{"id":3856,"date":"2026-05-04T04:00:53","date_gmt":"2026-05-04T02:00:53","guid":{"rendered":"https:\/\/studentmag.unipr.it\/?p=3856"},"modified":"2026-05-05T23:25:40","modified_gmt":"2026-05-05T21:25:40","slug":"toccare-con-dito-la-realta-il-computer-quantistico","status":"publish","type":"post","link":"https:\/\/studentmag.unipr.it\/index.php\/2026\/05\/04\/toccare-con-dito-la-realta-il-computer-quantistico\/","title":{"rendered":"Toccare con dito la realt\u00e0: il computer quantistico"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--link_color: var(--awb-color4);--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1144px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><ul style=\"--awb-size:18px;--awb-iconcolor:var(--awb-color3);--awb-line-height:30.6px;--awb-icon-width:30.6px;--awb-icon-height:30.6px;--awb-icon-margin:12.6px;--awb-content-margin:43.2px;\" class=\"fusion-checklist fusion-checklist-1 fusion-checklist-default type-icons\"><li class=\"fusion-li-item\" style=\"\"><span class=\"icon-wrapper circle-no\"><i class=\"fusion-li-icon fa-camera fas\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-li-item-content\">\n<p><strong>Alberto Lusetti<\/strong><\/p>\n<\/div><\/li><\/ul><div class=\"fusion-section-separator section-separator grunge fusion-section-separator-1\" style=\"--awb-spacer-height:43px;--awb-svg-margin-left:1.92%;--awb-svg-margin-right:1.92%;--awb-svg-margin-left-medium:1.92%;--awb-svg-margin-right-medium:1.92%;--awb-svg-margin-left-small:1.92%;--awb-svg-margin-right-small:1.92%;--awb-bg-size:100% 100%;--awb-bg-size-medium:100% 100%;--awb-bg-size-small:100% 100%;\"><div class=\"fusion-section-separator-svg\"><div class=\"fusion-grunge-candy-sep fusion-section-separator-svg-bg\" style=\"background-image:url( 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);height:43px;\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-separator fusion-has-icon fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;width:100%;\"><div class=\"fusion-separator-border sep-single sep-dashed\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:3px;\"><\/div><span class=\"icon-wrapper\" style=\"border-color:transparent;font-size:23px;width: 1.75em; height: 1.75em;border-width:3px;padding:3px;margin-top:-1.5px\"><i class=\"fa-angle-double-down fas\" style=\"font-size: inherit;color:var(--awb-color2);\" aria-hidden=\"true\"><\/i><\/span><div class=\"fusion-separator-border sep-single sep-dashed\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:3px;\"><\/div><\/div><div class=\"fusion-text fusion-text-1\" style=\"--awb-content-alignment:justify;\"><p>Atomi fermi e la certezza dell\u2019incertezza: questi sono i concetti che pi\u00f9 ci sono rimasti impressi nella lunga chiacchierata con la dottoranda Laura Bersani e la ricercatrice Elena Garlatti, le due scienziate che ci hanno accolto nel Laboratorio di Scienze e Tecnologie Quantistiche inaugurato a ottobre 2025 nel plesso di Fisica al Campus. Ci hanno raccontato nel modo pi\u00f9 semplice possibile il lavoro che svolgono, venendo soprattutto incontro alle nostre conoscenze base di fisica: lo zero assoluto; proprio come la temperatura che viene quasi raggiunta dal refrigeratore a diluizione (dilution refrigerator) della Leiden Cryogenics presente nel laboratorio. Vi state chiedendo cosa sia un refrigeratore a diluizione? Dovreste allora domandarvi anche cosa sia un computer quantistico e cosa sia un qubit. Preparate quindi i vostri snack preferiti, mettetevi comodi sotto un plaid soffice e cliccate <em>play<\/em> al primo episodio di questo spin off tecnologico un po\u2019 in salsa <em>The Big Bang Theor<\/em>y e un po\u2019 <em>Ai confini della realt\u00e0<\/em>, confini che si toccano proprio con la fredda punta del \u201cdito\u201d del dilution refrigerator.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-2\" style=\"--awb-content-alignment:justify;\"><h4 class=\"s4\" style=\"text-align: center;\">S1 EP1 \u2013 Non chiamatemi \u201csupercomputer\u201d<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"1200\" height=\"965\" title=\"IMG-20260220-WA0024\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-3\" style=\"--awb-content-alignment:center;\"><p>Il computer quantistico presente al plesso di Fisica del Campus \/ crediti <strong>Alberto Lusetti<\/strong><\/p>\n<\/div><div class=\"fusion-text fusion-text-4\" style=\"--awb-content-alignment:justify;\"><p>Lo <a href=\"https:\/\/spinquantumscience.unipr.it\/\" target=\"_blank\" rel=\"noopener\"><em>Spin base quantum science group <\/em><\/a>\u00e8 il team scientifico di cui Elena e Laura fanno parte, team che da 20 anni si trova in prima linea nelle ricerche sul magnetismo e sulla Meccanica Quantistica, una branca della Fisica che studia la materia e l\u2019energia su scale atomiche e subatomiche. I loro sforzi principali sono al momento incentrati sulla ricerca del miglior materiale per ottenere un computer quantistico, una delle frontiere scientifiche in campo tecnologico. Di questi ne esistono gi\u00e0 diversi prototipi efficienti: Elena ci ha spiegato che sia Google che IBM (l\u2019azienda madre del PC per come lo concepiamo noi) ne possiedono uno; esiste addirittura \u00abUn sito dove puoi accedere ad un computer quantistico \u2013 aggiunge Laura &#8211; puoi mandargli il tuo codice quantistico e lui ti fa il conto. \u00c8 abbastanza <em>user friendly<\/em>, anche se, ovviamente, devi sapere come scrivere la sequenza\u00bb. Ma perch\u00e9 l\u2019informatica si sta spingendo verso questa nuova tecnologia? \u00abI benefici sono diversi \u2013 racconta Laura \u2013 soprattutto sarebbe uno strumento potentissimo per la ricerca, perch\u00e9 riesce ad elaborare calcoli molto lunghi e sofisticati nel giro di poco tempo. Oggi questi si effettuano su grandi server dedicati esclusivamente al calcolo (i supercomputer) ma necessitano lo stesso molti giorni per elaborarli. Un altro importante sviluppo \u00e8 la crittografia nel campo delle comunicazioni: attualmente i software che se ne occupano utilizzano uno schema che un computer quantistico romperebbe in pochissimo tempo, \u00e8 necessario quindi passare ad una crittografia quantistica; pensate che sono nate <em>startup<\/em> con l\u2019intento di occuparsi di questo problema. Il vantaggio \u00e8 tutto racchiuso nella capacit\u00e0 di immagazzinare molte pi\u00f9 informazioni (e quindi pi\u00f9 velocit\u00e0 di calcolo) da parte del bit quantistico: il qubit\u00bb.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-5\" style=\"--awb-content-alignment:justify;\"><h4 class=\"s4\" style=\"text-align: center;\">S1 EP2 \u2013 Tesoro, mi si sono ingranditi i pixel<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><img decoding=\"async\" width=\"700\" height=\"700\" title=\"Coin rotation\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27700%27%20height%3D%27700%27%20viewBox%3D%270%200%20700%20700%27%3E%3Crect%20width%3D%27700%27%20height%3D%27700%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-6\" style=\"--awb-content-alignment:center;\"><p>crediti <a href=\"https:\/\/www.pexels.com\/it-it\/@pixabay\/\" target=\"_blank\" rel=\"noopener\"><strong>Pixabay<\/strong><\/a><\/p>\n<\/div><div class=\"fusion-text fusion-text-7\" style=\"--awb-content-alignment:justify;\"><p>Per capire cosa sia un qubit e perch\u00e9 abbia queste capacit\u00e0, dobbiamo immergerci nel mondo atomico e subatomico, governato da leggi molto diverse rispetto a come percepiamo la nostra quotidianit\u00e0. Partiamo dal significato di \u201cquanto\u201d descrittoci da Laura: \u00ab\u00c9 la minima quantit\u00e0 discreta di una grandezza fisica (come l\u2019energia) di un dato sistema. Immaginatelo come i pixel di un telefono: complessivamente voi vedete un\u2019immagine che sembra continua, bella liscia, senza interruzioni (la realt\u00e0 come la percepiamo); andando ad ingrandire sempre di pi\u00f9 vedrete invece che ci sono i pixel (i quanti)\u00bb. Se quindi noi percepiamo la realt\u00e0 con continuit\u00e0, a livello microscopico questo non accade: ci troviamo in un mondo fatto a blocchettini, in stati netti, \u201cquantizzati\u201d appunto. La cosa pi\u00f9 affascinante \u00e8 che questi blocchettini, intrinsecamente, non hanno identit\u00e0 specifica perch\u00e9 si trovano in una sovrapposizione di pi\u00f9 stati fisici, ad esempio diverse posizioni o energie. Questa condizione collassa (scompare) quando si effettua un\u2019interazione fisica (una misura) col quanto, indirizzandolo verso uno solo dei suoi possibili stati. Elena e Laura ce lo fanno visualizzare immaginando il lancio di una moneta in aria, un sistema a due stati: fin quando ruota su s\u00e9 stessa non \u00e8 n\u00e9 testa n\u00e9 croce ma passa di continuo dall\u2019uno all\u2019altro stato; quando l\u2019afferriamo e l\u2019appoggiamo sul dorso della mano stiamo effettuando la misura: ora \u00e8 solo testa. Le interazioni con l\u2019ambiente circostante, inoltre, portano alla perdita di coerenza quantistica: la temperatura, ad esempio, \u00abIntroduce del rumore, del movimento, dell\u2019agitazione termica \u2013 spiega Laura \u2013 ecco perch\u00e9 noi lavoriamo a temperature bassissime, dove tutto viene rallentato. Atomi completamente fermi sono impossibili da ottenere per loro stessa natura, ma riusciamo a ridurre enormemente le loro fluttuazioni e a condensare il sistema \u201cal suo stato base\u201d\u00bb, ed \u00e8 qui che entra in gioco il refrigeratore a diluizione.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-8\" style=\"--awb-content-alignment:justify;\"><h4 class=\"s4\" style=\"text-align: center;\">S1 EP3 \u2013 Il dito nella piega\u2026 quantistica<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><img decoding=\"async\" width=\"675\" height=\"900\" title=\"DR\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-9\" style=\"--awb-content-alignment:center;\"><p>La complessa struttura del dilution refrigerator e il suo caratteristico &#8220;dito&#8221; \/ crediti <strong>Elena Garlatti<\/strong><\/p>\n<\/div><div class=\"fusion-text fusion-text-10\" style=\"--awb-content-alignment:justify;\"><p>\u00abPu\u00f2 arrivare a temperature prossime allo zero assoluto. Pensate che nello spazio c\u2019\u00e8 pi\u00f9 caldo, rispetto al \u201cdito\u201d freddo del dilution\u00bb. Elena ci introduce cos\u00ec questo apparecchio criogenico che permette di raggiungere temperature fino a -273 gradi Celsius (a -273.15 si arriva allo zero assoluto) grazie all\u2019elio liquido pompato al suo interno. Il macchinario non \u00e8 visibile perch\u00e9 avvolto da un contenitore, ma guardando la fotografia appesa alla parete ricorda un astrolampo, l\u2019elegante lampadario di un teatro all\u2019italiana: una lucente intelaiatura cilindrica verticale, ariosa, composta da piattaforme circolari connesse tra di loro da piccole strutture tubiformi che gravitano verso il basso, verso una lunga protuberanza tubolare: il suo \u201cdito\u201d. \u00c8 proprio sulla sua punta che avviene il contatto con il mondo quantico grazie a due componenti: un cristallino di nanomagneti molecolari, le nostre molecole \u201ccalcolatrici\u201d e un criomagnete che aiuta nella loro manipolazione (ancora no spoiler, siamo solo al 3\u00b0 episodio)<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-11\" style=\"--awb-content-alignment:justify;\"><h4 class=\"s4\" style=\"text-align: center;\">S1 EP4 \u2013 Qu(anti)bit in un germoglio<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-4 hover-type-none\"><img decoding=\"async\" width=\"992\" height=\"634\" title=\"Immagine quanto 3\" src=\"https:\/\/studentmag.unipr.it\/wp-content\/uploads\/2026\/04\/Immagine-quanto-3-e1776443875304.jpg\" data-orig-src=\"https:\/\/studentmag.unipr.it\/wp-content\/uploads\/2026\/04\/Immagine-quanto-3-e1776443875304.jpg\" alt class=\"lazyload img-responsive wp-image-3902\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-12\" style=\"--awb-content-alignment:center;\"><p>Una semplificazione grafica e bidimensionale del comportamento dello &#8220;spin&#8221; quantistico dell&#8217;elettrone \/ crediti <strong>Alberto Lusetti<\/strong><\/p>\n<\/div><div class=\"fusion-text fusion-text-13\" style=\"--awb-content-alignment:justify;\"><p>Ok, siamo arrivati a quel momento della stagione dove trame apparentemente slegate cominciano ad intrecciarsi: magnetismo e informatica. Laura ci spiega che \u00e8 quantistica anche l\u2019origine del magnetismo della materia: \u00abSi basa sullo \u201cspin\u201d, una propriet\u00e0 quantistica intrinseca negli elettroni degli atomi: contribuisce al momento magnetico delle particelle e pu\u00f2 allinearsi con un campo magnetico, come l\u2019ago di una bussola. Questa direzione possiamo immaginarla come una piccola freccia che punta verso l\u2019alto o verso il basso. Un materiale \u00e8 magnetico tanto pi\u00f9 possiede elementi con spin in un\u2019unica direzione; nel caso di una situazione intermedia, non lo \u00e8\u00bb. Lo spin \u00e8 quindi un sistema binario che possiamo associare convenzionalmente ai due bit alla base dell\u2019informatica: uno stato allo 0 l\u2019altro a 1. Essendo quantistico (in sovrapposizione di stati) dobbiamo per\u00f2 anche considerare tutte quelle probabilit\u00e0 in cui la freccia possa essere un po\u2019 pi\u00f9 in alto o un po\u2019 pi\u00f9 in basso: possiamo trovarci in situazioni probabilistiche come 50 e 50 (la nostra moneta di prima, ad esempio) oppure 70 e 30 o anche 99 e 1. Questo gioco di probabilit\u00e0, tradotto in cifre, permette di prendere in considerazione tutti quegli infiniti valori compresi tra 0 e 1, come 0,36 oppure 0,75. Attenzione per\u00f2, questa sovrapposizione non \u00e8 una semplice probabilit\u00e0 classica come la intendiamo noi, ma \u00e8 una combinazione quantistica di stati: possono avere anche ampiezze complesse che si riescono ad estrarre solo in seguito ad una misura. La capacit\u00e0 di elaborare informazioni che risiede in un bit quantistico (ecco il qubit!) \u00e8 quindi maggiore del bit classico, perch\u00e9 permette risposte pi\u00f9 sfumate. Laura: \u00abIn meccanica quantistica il focus si sposta non tanto sul conoscere dove sia l\u2019oggetto, su cosa faccia e come \u00e8 fatto, ma sul sapere con che probabilit\u00e0 pu\u00f2 essere una certa cosa piuttosto che un\u2019altra. Noi siamo assolutamente certi di come \u00e8 incerto\u00bb. Le potenzialit\u00e0 del qubit si manifestano soprattutto quando questo lo si connette ad un altro qubit a lui affiancato: \u00abSi sfrutta un\u2019altra propriet\u00e0 quantisitica \u2013 aggiunge Elena &#8211; l\u2019entanglement (\u201cintreccio\u201d): oltre ad essere in sovrappostone lui \u00e8 in sovrapposizione col suo vicino, diventando correlati in modo tale da non poter essere descritti indipendentemente\u00bb una situazione che permette un ampliamento esponenziale delle potenzialit\u00e0 di calcolo ad ogni qubit intrecciato. Tutto sembra cos\u00ec semplice e lineare ma\u2026 non vi sembra manchi il plot twist di mezza stagione?<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-6 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-14\" style=\"--awb-content-alignment:justify;\"><h4 style=\"text-align: center;\">S1 EP5 \u2013 Mamma, ho perso (di vista) il quanto<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-5 hover-type-none\"><img decoding=\"async\" width=\"1000\" height=\"667\" title=\"Visione\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271000%27%20height%3D%27667%27%20viewBox%3D%270%200%201000%20667%27%3E%3Crect%20width%3D%271000%27%20height%3D%27667%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/studentmag.unipr.it\/wp-content\/uploads\/2026\/04\/Visione-e1776810369746.jpg\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-15\" style=\"--awb-content-alignment:center;\"><p>crediti <a href=\"https:\/\/unsplash.com\/it\/@ionfet\" target=\"_blank\" rel=\"noopener\"><strong>Ion Fet<\/strong><\/a><\/p>\n<\/div><div class=\"fusion-text fusion-text-16\" style=\"--awb-content-alignment:justify;\"><p>Siamo sicuri che vi stiate chiedendo perch\u00e9 non vi si siano ancora sovrapposti gli occhi allo schermo, dopo questi quattro episodi. Qualche risposta ve l\u2019abbiamo gi\u00e0 data prima: la temperatura e altri fattori, tra cui il nostro essere macroscopici, non permettono di esperire (fortunatamente?) la sovrapposizione di stati. Ma c\u2019\u00e8 anche un altro elemento da considerare: la vista. \u00abTutte le volte che fai una misura o interagisci con il quanto \u2013 spiega Laura \u2013 ne alteri lo stato quantistico: \u201cvedere\u201d <em>\u00e8<\/em> una misura. Come funziona la visione? \u00c8 un concetto particolare: la mia mano non splende, per\u00f2 io la vedo lo stesso perch\u00e9 la luce ci rimbalza contro; quindi di fatto c\u2019\u00e8 stata una piccola interazione di luce (fotoni) con la mia mano. Se osservi un oggetto stai interagendo con lui per via di questo passaggio di luce. Non sappiamo quindi come siano fatti questi stati quantistici, non possiamo vederli con gli occhi\u00bb. Avete mai guardato <em>Lost<\/em>? L\u2019impatto \u00e8 stato pi\u00f9 o meno come quello di scoprire l\u2019esistenza di una certa botola sull\u2019isola\u2026<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-7 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-17\" style=\"--awb-content-alignment:justify;\"><h4 style=\"text-align: center;\">S1 EP6 &#8211; Il Matrix<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-6 hover-type-none\"><img decoding=\"async\" width=\"1000\" height=\"667\" title=\"Matrix light\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271000%27%20height%3D%27667%27%20viewBox%3D%270%200%201000%20667%27%3E%3Crect%20width%3D%271000%27%20height%3D%27667%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/studentmag.unipr.it\/wp-content\/uploads\/2026\/04\/Matrix-light-e1776810385183.jpg\" alt class=\"lazyload img-responsive wp-image-3904\"\/><\/span><\/div><div class=\"fusion-section-separator section-separator grunge fusion-section-separator-7\" style=\"--awb-spacer-height:10px;--awb-svg-margin-left:1.92%;--awb-svg-margin-right:1.92%;--awb-svg-margin-left-medium:1.92%;--awb-svg-margin-right-medium:1.92%;--awb-svg-margin-left-small:1.92%;--awb-svg-margin-right-small:1.92%;--awb-divider-height:10px;--awb-spacer-padding-top:inherit;--awb-bg-size:100% 10px;--awb-bg-size-medium:100% 100%;--awb-bg-size-small:100% 100%;\"><div class=\"fusion-section-separator-svg\"><div class=\"fusion-grunge-candy-sep fusion-section-separator-svg-bg\" style=\"background-image:url( 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-18\" style=\"--awb-content-alignment:center;\"><p>crediti <a href=\"https:\/\/unsplash.com\/it\/@profwicks\" target=\"_blank\" rel=\"noopener\"><strong>Ben Wicks<\/strong><\/a><\/p>\n<\/div><div class=\"fusion-text fusion-text-19\" style=\"--awb-content-alignment:justify;\"><p>Non possiamo vedere gli stati quantici di persona ma la matematica ci aiuta a visualizzarli: prima di effettuare il calcolo con i qubit c\u2019\u00e8 un lungo lavoro teorico e tecnico a supporto della creazione dell\u2019algoritmo che si vuol testare. Una volta ideato, l\u2019obiettivo \u00e8 vedere se ci sia riscontro nella fase sperimentale: \u00abRaffreddiamo con il dilution il nostro cristallino (le molecole), lo magnetizziamo col criomagnete e poi cerchiamo di manipolare lo stato quantistisco dei loro spin con altri campi magnetici a nostro comando, realizzando una sequenza di operazioni ben precise: un algoritmo. Al momento stiamo operando in contemporanea sugli spin di pi\u00f9 molecole ma puntiamo in futuro a manipolare quello di ogni singolo atomo\u00bb. Il processo raccontatoci da Elena avviene sulle centinaia di nanosecondi, un lasso di tempo percettibile per far diventare gli spin quantistici, prima che qualcosa torni ad interagire con loro: nonostante le bassissime temperature, ci sono ancora delle interazioni, del \u201crumore\u201d, che distruggono lo stato di sovrapposizione. A far da tramite in questa operazione \u00e8 ancora il computer classico: si prende carico dell\u2019input (il comando) da dare agli spin e dell\u2019output, lasciando la parte del calcolo ai qubit. Gli stimoli fisici provenienti dalla sollecitazione degli spin vengono infatti tradotti in linguaggio binario ma \u00abPer ora non riusciamo a parlare direttamente con il quantistico \u2013 racconta Laura \u2013 i risultati ottenuti vanno interpretati e tradotti in un linguaggio che ci permetta di comprendere se il calcolo sia venuto o meno. Lo stesso vale per i computer normali: se tutti possiamo utilizzarli \u00e8 grazie a degli interpreti che non ci mostrano sequenze di 0 e 1\u00bb.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-8 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-row\"><div class=\"fusion-text fusion-text-20\" style=\"--awb-content-alignment:justify;\"><h4 style=\"text-align: center;\">S1 EP7 \u2013 Quanto, ci mancherai<\/h4>\n<\/div><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-7 hover-type-none\"><img decoding=\"async\" width=\"1000\" height=\"675\" title=\"20260220_152901\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271000%27%20height%3D%27675%27%20viewBox%3D%270%200%201000%20675%27%3E%3Crect%20width%3D%271000%27%20height%3D%27675%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"https:\/\/studentmag.unipr.it\/wp-content\/uploads\/2026\/04\/20260220_152901-scaled-e1776810423416.jpg\" alt class=\"lazyload img-responsive wp-image-3916\"\/><\/span><\/div><div class=\"fusion-text fusion-text-21\" style=\"--awb-content-alignment:center;\"><p>I cristallini utilizzati per il calcolo quantistico \/ crediti <strong>Alberto Lusetti<\/strong><\/p>\n<\/div><div class=\"fusion-section-separator section-separator grunge fusion-section-separator-8\" style=\"--awb-spacer-height:10px;--awb-svg-margin-left:1.92%;--awb-svg-margin-right:1.92%;--awb-svg-margin-left-medium:1.92%;--awb-svg-margin-right-medium:1.92%;--awb-svg-margin-left-small:1.92%;--awb-svg-margin-right-small:1.92%;--awb-divider-height:10px;--awb-spacer-padding-top:inherit;--awb-bg-size:100% 10px;--awb-bg-size-medium:100% 100%;--awb-bg-size-small:100% 100%;\"><div class=\"fusion-section-separator-svg\"><div class=\"fusion-grunge-candy-sep fusion-section-separator-svg-bg\" 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);\"><\/div><\/div><div class=\"fusion-section-separator-spacer\"><div class=\"fusion-section-separator-spacer-height\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-22\" style=\"--awb-content-alignment:justify;\"><p>Non c\u2019\u00e8 stata nessuna lunga e affascinante speculazione sui buchi neri e sulla Teoria delle stringhe come pensavamo, tutta colpa del nostro scienziato televisivo preferito, Sheldon Cooper (a cui per\u00f2 continuiamo a voler bene). Ci siamo imbattuti invece in un mix tra fisica, matematica ed informatica, forse non il miglior smoothie da sorseggiare per due menti umanistiche come le nostre. Salutando per\u00f2 le due ricercatrici, ci piace immaginarci tra i primi testimoni nell\u2019ambito di questa ricerca di frontiera. La storia ci insegna a non sottovalutare una tecnologia che oggi sembra fantascienza solo perch\u00e9 non \u00e8 alla portata del quotidiano; si era fatto lo stesso errore ontologico con i primi calcolatori, ingombranti quanto gli armadi di casa. Elena e Laura ci hanno illustrato le strette collaborazioni per portare avanti le ricerche con la stessa IBM e altre universit\u00e0 internazionali: da Manchester a Saragozza, da Berlino a Copenaghen (\u00e8 da qui che arrivano i cristallini) fino alla prestigiosa Northwestern University in Illinois, negli Stati Uniti. E mentre ci immaginiamo in un futuro lontano di avere in tasca uno smartphone quantistico, sul funzionamento della nostra realt\u00e0 ci rimane qualche dubbio esistenziale\u2026 quanti? Forse troppi.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Nel plesso di Fisica del Campus si sperimenta con una tecnologia all&#8217;avanguardia, sfruttando la meccanica quantistica<\/p>\n","protected":false},"author":8,"featured_media":3881,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25,29],"tags":[202,148,58],"autore":[163,176],"class_list":["post-3856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cool-tura","category-uni-verso","tag-scienza","tag-studenti","tag-universita","autore-alberto-lusetti","autore-federica-davoli"],"acf":[],"_links":{"self":[{"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/posts\/3856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/comments?post=3856"}],"version-history":[{"count":35,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/posts\/3856\/revisions"}],"predecessor-version":[{"id":4273,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/posts\/3856\/revisions\/4273"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/media\/3881"}],"wp:attachment":[{"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/media?parent=3856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/categories?post=3856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/tags?post=3856"},{"taxonomy":"autore","embeddable":true,"href":"https:\/\/studentmag.unipr.it\/index.php\/wp-json\/wp\/v2\/autore?post=3856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}