{"id":33972,"date":"2019-10-31T21:55:41","date_gmt":"2019-10-31T18:55:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/nehvatka-geliya-mozhet-zamedlit-razvitie-kvantovyh-kompyuterov-obsuzhdaem-situatsiyu\/"},"modified":"2019-10-31T21:55:41","modified_gmt":"2019-10-31T18:55:41","slug":"nehvatka-geliya-mozhet-zamedlit-razvitie-kvantovyh-kompyuterov-obsuzhdaem-situatsiyu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/nehvatka-geliya-mozhet-zamedlit-razvitie-kvantovyh-kompyuterov-obsuzhdaem-situatsiyu","title":{"rendered":"Pomanjkanje helija lahko upo\u010dasni razvoj kvantnih ra\u010dunalnikov \u2014 razpravljamo o situaciji","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h5>Pogovarjamo o predpostavkah in navajamo mnenja strokovnjakov.<\/h5>\n<p>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/it-grad\/blog\/452424\/\"><img decoding=\"async\" alt=\"Pomanjkanje helija lahko upo\u010dasni razvoj kvantnih ra\u010dunalnikov \u2014 razpravljamo o situaciji\" src=\"\/wp-content\/uploads\/2019\/05\/1c0063cadf0d68b5c1f56e2e98a4b205.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><br \/>\n<i>\/ \u0444\u043e\u0442\u043e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/ibm_research_zurich\/33106602201\">IBM Research<\/a><\/noindex> CC BY-ND<\/i><\/p>\n<h2>Zakaj je helij v kvantnih ra\u010dunalnikih<\/h2>\n<p>\nPreden preidemo na razpravo o pomanjkanju helija, se pogovorimo o tem, zakaj kvantnim ra\u010dunalnikom sploh potrebujemo helij.<\/p>\n<p>Kvantne naprave delujejo s kubiti. Ti, za razliko od klasi\u010dnih bitov, lahko obstajajo v stanjih 0 in 1 hkrati \u2014 v superpoziciji. V ra\u010dunalni\u0161kem sistemu se pojavi fenomen kvantnega paralelizma, kjer se operacije izvajajo hkrati z ni\u010dlo in enico. Ta posebnost omogo\u010da napravam na osnovi kubitov, da re\u0161ujejo nekatere naloge hitreje kot klasi\u010dni ra\u010dunalniki \u2014 na primer, modelirajo molekulske in kemi\u010dne reakcije.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Toda tu se pojavi te\u017eava: kubiti so krhki in ohranjati superpozicijo lahko le nekaj nanosekund. Tudi majhna nihanja temperature jo lahko motijo in pride do tako imenovane\u00a0<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%94%D0%B5%D0%BA%D0%BE%D0%B3%D0%B5%D1%80%D0%B5%D0%BD%D1%86%D0%B8%D1%8F\">dekoherencije<\/a><\/noindex>. Da bi se izognili uni\u010denju kubitov, morajo kvantni ra\u010dunalniki <noindex><a rel=\"nofollow\" href=\"https:\/\/mashable.com\/2018\/01\/08\/ibm-quantum-computer-ces-201i8\/\">delovati<\/a><\/noindex> v pogojih nizkih temperatur \u2014 10 mK (\u2013273,14 \u00b0C). Za dosego temperatur, bli\u017enjih absolutni ni\u010dli, podjetja uporabljajo teko\u010di helij, natan\u010dneje izotop <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9-3\">helij-3<\/a><\/noindex>, ki pri takih ekstremnih pogojih ne strdi.<\/p>\n<h2>Kak\u0161en je problem<\/h2>\n<p>\nV bli\u017enji prihodnosti se lahko IT-industrija soo\u010di s pomanjkanjem helija-3 za razvoj kvantnih ra\u010dunalnikov. Na Zemlji je ta snov prakti\u010dno neodkrita v naravni obliki \u2014 njen dele\u017e v atmosferi planeta <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9-3#%D0%A0%D0%B0%D1%81%D0%BF%D1%80%D0%BE%D1%81%D1%82%D1%80%D0%B0%D0%BD%D1%91%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C\">zna\u0161a le 0,000137%<\/a><\/noindex> (1,37 delov na milijon v razmerju do helija-4). Helij-3 je proizvod razpada tritija, katerega proizvodnjo <noindex>so ustavili leta 1988<\/noindex> (v ZDA so zaprli zadnjo te\u017ekovodno jedrsko elektrarno). Po tritiju so za\u010deli pridobivati iz komponent ukinjenega jedrskega oro\u017eja, vendar po <noindex><a rel=\"nofollow\" href=\"https:\/\/fas.org\/sgp\/crs\/misc\/R41419.pdf?forcedefault=true\">podatkov<\/a><\/noindex> Raziskovalni slu\u017ebi Kongresa ZDA ta pobuda ni omogo\u010dila pomembnega pove\u010danja zalog strate\u0161ke snovi. Rusija in ZDA imata nekaj zalog, vendar <noindex><a rel=\"nofollow\" href=\"https:\/\/www.lanl.gov\/discover\/publications\/1663\/2014-august\/_assets\/docs\/1663_22_HE3.pdf\">se pribli\u017eujejo koncu<\/a><\/noindex>.<\/p>\n<p>Situacija se dodatno pogor\u0161ava \u010dinjenicom da zna\u010dajna koli\u010dina helija-3 odlazi u proizvodnju neutron\u0161kih skenera koji se koriste na grani\u010dnim prelazima za pronala\u017eenje radioaktivnih materijala. Neutronski skener je obavezan alat na svim ameri\u010dkim carinama od 2000. godine. Zbog niza faktora, u SAD-u se snabdevanje helijem-3 ve\u0107 kontroli\u0161e od strane dr\u017eavnih organa, koji izdaju kvote dr\u017eavnim i privatnim organizacijama, a IT stru\u010dnjaci su zabrinuti da \u0107e uskoro svima koji \u017eele helij-3 po\u010deti da nedostaje.<\/p>\n<h2>Koliko je lo\u0161e<\/h2>\n<p>\nPostoji mi\u0161ljenje da \u0107e nedostatak helija-3 negativno uticati na kvantne razvojne projekte. Blejk D\u017eonson (Blake Johnson), potpredsednik kompanije koja proizvodi kvantne kompjutere Rigetti Computing, u intervjuu za MIT Tech Review <noindex><a rel=\"nofollow\" href=\"https:\/\/www.technologyreview.com\/s\/612760\/quantum-computers-component-shortage\/\">je povedal<\/a><\/noindex>, ka\u017ee da je rashladni agens neverovatno te\u0161ko nabaviti. Problemi se dodatno pogor\u0161avaju njegovom visokom cenom \u2014 punjenje jedne rashladne jedinice ko\u0161ta 40 hiljada dolara.<\/p>\n<p>Me\u0111utim, predstavnici D-Wave, drugog kvantnog startapa, ne sla\u017eu se s mi\u0161ljenjem Blejka. Prema <noindex><a rel=\"nofollow\" href=\"https:\/\/www.techrepublic.com\/article\/how-helium-shortages-will-impact-quantum-computer-research\/\">besedah<\/a><\/noindex> re\u010dima potpredsednika organizacije, proizvodnja jednog kvantnog kompjutera zahteva samo malu koli\u010dinu helija-3, koju mo\u017eemo smatrati neznatnom u pore\u0111enju s ukupnom dostupnom koli\u010dinom supstance. Stoga, deficit rashladnog agensa bi\u0107e neprimetan za kvantnu industriju.<\/p>\n<p>Plus, danas se razmatraju druge metode va\u0111enja helija-3 koje nisu povezane s tritijumom. Jedna od njih je va\u0111enje izotopa iz prirodnog gasa. Prvo se podvrgava dubokoj kondenzaciji na niskim temperaturama, a zatim prolazi kroz procese separacije i rektifikacije (odvajanja gasnih impureti). Ovaj pristup je ranije smatran ekonomski neopravdanim, ali se situacija promenila s razvojem tehnologije. Pro\u0161le godine su najavili svoje planove za po\u010detak va\u0111enja helija-3 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.interfax.ru\/business\/595180\">u \u201eGazpromu\u201c<\/a><\/noindex>.<\/p>\n<blockquote><p>Nekoliko zemalja planira va\u0111enje helija-3 na Mesecu. U njegovom povr\u0161inskom sloju nalazi se do <noindex><a rel=\"nofollow\" href=\"https:\/\/www.lpi.usra.edu\/meetings\/lpsc2007\/pdf\/2175.pdf\">2,5 miliona tona<\/a><\/noindex> (tabela 2) ove supstance. Prema procenama nau\u010dnika, resursa \u0107e biti dovoljno za pet milenijuma. U NASA-i su ve\u0107 po\u010deli da razvijaju <noindex><a rel=\"nofollow\" href=\"http:\/\/ntrs.nasa.gov\/archive\/nasa\/casi.ntrs.nasa.gov\/19890005477.pdf\">projekte postrojenja<\/a><\/noindex>, koja prera\u0111uju <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A0%D0%B5%D0%B3%D0%BE%D0%BB%D0%B8%D1%82\">regolit<\/a><\/noindex> u helij-3. Razvojem odgovaraju\u0107e infrastrukturne opreme na Zemlji i Mesecu bave se <noindex><a rel=\"nofollow\" href=\"https:\/\/www.dawn.com\/news\/1315836\">Indija<\/a><\/noindex> in <noindex><a rel=\"nofollow\" href=\"https:\/\/www.extremetech.com\/extreme\/197784-china-is-going-to-mine-the-moon-for-helium-3-fusion-fuel\">Kitajska<\/a><\/noindex>. Me\u0111utim, implementacija \u0107e biti mogu\u0107a najranije 2030. godine.<\/p><\/blockquote>\n<p>\n\u0160e en na\u010din za prepre\u010devanje pomanjkanja helija-3 je najti nadomestek pri proizvodnji nevtronskih skenerjev. Mimogrede, ta <noindex><a rel=\"nofollow\" href=\"https:\/\/www.machinedesign.com\/materials\/researchers-devise-long-sought-workaround-helium-3-shortage\">je \u017ee bil odkrit<\/a><\/noindex> leta 2018 \u2014 to so kristali cinkovega sulfida in litijevega fluorida-6. Ti omogo\u010dajo zaznavanje radioaktivnih materialov s natan\u010dnostjo, ki presega 90%.<\/p>\n<p><img decoding=\"async\" alt=\"Pomanjkanje helija lahko upo\u010dasni razvoj kvantnih ra\u010dunalnikov \u2014 razpravljamo o situaciji\" src=\"\/wp-content\/uploads\/2019\/05\/0e0fc46a0ef6adbca809831b64a1abe2.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ \u0444\u043e\u0442\u043e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flickr.com\/photos\/ibm_research_zurich\/33235097265\">IBM Research<\/a><\/noindex> CC BY-ND<\/i><\/p>\n<h2>Druge 'kvantne' te\u017eave<\/h2>\n<p>\nPoleg pomanjkanja helija obstajajo tudi druge ovire, ki ovirajo razvoj kvantnih ra\u010dunalnikov. Prva je pomanjkanje strojne opreme. Na svetu je \u0161e vedno malo velikih podjetij, ki se ukvarjajo z razvojem 'notranjosti' za kvantne naprave. V\u010dasih morajo podjetja \u010dakati, da izdelajo sistem hlajenja, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.technologyreview.com\/s\/612760\/quantum-computers-component-shortage\/\">ve\u010d kot eno leto<\/a><\/noindex>.<\/p>\n<p>\u0160tevilne dr\u017eave posku\u0161ajo re\u0161iti problem preko vladnih programov. Tak\u0161ne pobude so \u017ee uvedene v ZDA in Evropi. Na primer, nedavno je na Nizozemskem z podporo Ministrstva za ekonomijo za\u010delo delovati podjetje Delft Circuits. Ukvarja se s proizvodnjo komponent za kvantne ra\u010dunalni\u0161ke sisteme.<\/p>\n<p>\u0160e ena te\u017eava je pomanjkanje strokovnjakov. Povpra\u0161evanje po njih nara\u0161\u010da, a jih ni enostavno najti. Po <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nytimes.com\/2018\/10\/21\/technology\/quantum-computing-jobs-immigration-visas.html\">podatkov<\/a><\/noindex> NYT, na svetu ni ve\u010d kot tiso\u010d izku\u0161enih 'kvantnih in\u017eenirjev'. Problematiko re\u0161ujejo vodilni tehni\u010dni univerze. Na MIT so \u017ee <noindex><a rel=\"nofollow\" href=\"http:\/\/news.mit.edu\/2019\/mit-william-oliver-qanda-talent-shortage-quantum-computing-0123\">ustvarjajo<\/a><\/noindex> prve programe za izobra\u017eevanje strokovnjakov za delo s kvantnimi napravami. Razvijajo se ustrezni akademski programi <noindex><a rel=\"nofollow\" href=\"https:\/\/www.hpcwire.com\/2018\/09\/17\/house-passes-1-275b-national-quantum-initiative\/\">se bave<\/a><\/noindex> tudi v ameri\u0161ki National Quantum Initiative.<\/p>\n<p>Na splo\u0161no so IT strokovnjaki prepri\u010dani, da so problemi, s katerimi se soo\u010dajo ustvarjalci kvantnih ra\u010dunalnikov, zagotovo premagljivi. V prihodnosti lahko pri\u010dakujemo nove tehnolo\u0161ke preboje na tem podro\u010dju.<\/p>\n<p>\nO \u010demer pi\u0161emo v prvem blogu o korporativnem IaaS:<\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/bezopasnost\/god-v-dejstvii-kogo-i-za-chto-nakazali-po-gdpr\/\">Leto v akciji: koga in zakaj so kaznovali po GDPR<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/ploshhadki\/razvitie-data-centrov-texnologicheskie-trendy-2\/\">Razvoj data centara: tehnolo\u0161ki trendovi<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/proizvoditelnost\/kak-povysit-energoeffektivnost-data-centra\/\">Kako pove\u0107ati energetsku efikasnost data centra<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/pochemu-korporativnye-zakazchiki-ispolzuyut-virtualnye-mashiny-a-ne-kontejnery\/\">Zakaj podjetja uporabljajo virtualne stroje in ne kontejnerjev<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/kak-iaas-pomogaet-razvivat-biznes-tri-zadachi-kotorye-reshit-oblako\/\">Kako IaaS poma\u017ee razvoju poslovanja: tri zadatka koje oblak re\u0161ava<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/tendencii\/besservernye-vychisleniya-v-oblake-trend-sovremennosti-ili-neobxodimost\/\">Brezstre\u017eni izra\u010duni v oblaku \u2013 trend sodobnosti ali nuja?<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/iaas-blog.it-grad.ru\/proizvoditelnost\/testirovanie-diskovoj-sistemy-v-oblake\/\">Kako testirati diskovni sistem v oblaku<\/a><\/noindex><\/li>\n<\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/it-grad\/blog\/452424\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u043c \u043e \u043f\u0440\u0435\u0434\u043f\u043e\u0441\u044b\u043b\u043a\u0430\u0445 \u0438 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u043c \u043c\u043d\u0435\u043d\u0438\u044f \u044d\u043a\u0441\u043f\u0435\u0440\u0442\u043e\u0432. \/ \u0444\u043e\u0442\u043e IBM Research CC BY-ND \u0417\u0430\u0447\u0435\u043c \u043d\u0443\u0436\u0435\u043d \u0433\u0435\u043b\u0438\u0439 \u0432 \u043a\u0432\u0430\u043d\u0442\u043e\u0432\u044b\u0445 \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0430\u0445 \u041f\u0440\u0435\u0436\u0434\u0435 \u0447\u0435\u043c \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u043a \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0443 \u043e \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438 \u0441 \u043d\u0435\u0445\u0432\u0430\u0442\u043a\u043e\u0439 \u0433\u0435\u043b\u0438\u044f, \u043f\u043e\u0433\u043e\u0432\u043e\u0440\u0438\u043c \u043e \u0442\u043e\u043c, \u0437\u0430\u0447\u0435\u043c \u0432\u043e\u043e\u0431\u0449\u0435 \u043a\u0432\u0430\u043d\u0442\u043e\u0432\u044b\u043c \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0430\u043c \u043d\u0443\u0436\u0435\u043d \u0433\u0435\u043b\u0438\u0439. \u041a\u0432\u0430\u043d\u0442\u043e\u0432\u044b\u0435 \u043c\u0430\u0448\u0438\u043d\u044b \u043e\u043f\u0435\u0440\u0438\u0440\u0443\u044e\u0442 \u043a\u0443\u0431\u0438\u0442\u0430\u043c\u0438. \u041e\u043d\u0438, \u0432 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0431\u0438\u0442\u043e\u0432, \u043c\u043e\u0433\u0443\u0442 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u0432 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f\u0445 0 \u0438 1 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