{"id":4186,"date":"2020-05-31T18:10:06","date_gmt":"2020-05-31T16:10:06","guid":{"rendered":"http:\/\/websrv.saske.sk\/uef\/?p=4186"},"modified":"2020-06-01T12:15:29","modified_gmt":"2020-06-01T10:15:29","slug":"o-krok-blizsie-ku-kvantovym-pocitacom","status":"publish","type":"post","link":"https:\/\/websrv.saske.sk\/uef\/o-krok-blizsie-ku-kvantovym-pocitacom\/","title":{"rendered":"O krok bli\u017e\u0161ie ku kvantov\u00fdm po\u010d\u00edta\u010dom"},"content":{"rendered":"

V\u00fdskumn\u00e1 skupina z\u00a0ko\u0161ick\u00e9ho\u00a0Centra fyziky n\u00edzkych tepl\u00f4t\u00a0veden\u00e1\u00a0Mgr. Tom\u00e1\u0161om Samuelym, PhD. z\u00a0\u00dastavu fyzik\u00e1lnych vied PF UPJ\u0160 v\u00a0Ko\u0161iciach publikovala v\u00a0najnov\u0161om \u010d\u00edsle prest\u00ed\u017eneho americk\u00e9ho \u010dasopisu\u00a0Science Advances<\/a>\u00a0svoje v\u00fdsledky experimentov\u00a0na supravodivom feromagnetickom diamante. \u010casopis\u00a0Science Advances<\/a>\u00a0je zaraden\u00fd v\u00a0rebr\u00ed\u010dku\u00a0Nature Index<\/a>\u00a0a\u00a0m\u00e1 impaktov\u00fd faktor vy\u0161e 12,8. Publikovan\u00e1 \u0161t\u00fadia Zhang, Samuely, Iwahara et al. (2020) tak\u00a0potvrdzuje vysok\u00fa kvalitu a\u00a0medzin\u00e1rodn\u00e9 uznanie experiment\u00e1lnej fyziky na PF UPJ\u0160 a\u00a0SAV v\u00a0Ko\u0161iciach.<\/strong><\/p>\n

Ko\u0161ick\u00e1 skupina pomocou n\u00edzkoteplotn\u00e9ho skenovacieho tunelov\u00e9ho mikroskopu identifikovala s\u00fa\u010dasn\u00fd v\u00fdskyt dvoch zvy\u010dajne navz\u00e1jom sa vylu\u010duj\u00facich javov, supravodivosti a\u00a0feromagnetizmu. V\u00fdskumn\u00edci uk\u00e1zali, \u017ee neobvykl\u00e1 kombin\u00e1cia uveden\u00fdch javov sp\u00f4sobuje vznik\u00a0Yu-Shiba-Rusinovov\u00fdch\u00a0<\/strong>(YSR) p\u00e1sov<\/strong>\u00a0– unik\u00e1tnych elektr\u00f3nov\u00fdch stavov s\u00a0rozsahom desiatok nanometrov. V\u00fdsledky ko\u0161ick\u00e9ho experimentu boli potvrden\u00e9 aj teoretick\u00fdm modelom v\u00a0medzin\u00e1rodnej spolupr\u00e1ci expertov z\u00a0 D\u00e1nska, Belgicka, Nemecka, Spojen\u00e9ho kr\u00e1\u013eovstva a\u00a0Singapuru.<\/p>\n

Spojenie feromagnetick\u00e9ho usporiadania spinov a\u00a0supravodivosti je jav s\u00a0potenci\u00e1lnym uplatnen\u00edm v\u00a0spintronike<\/strong>, ale aj v kvantov\u00fdch technol\u00f3gi\u00e1ch<\/strong>. Na rozdiel od elektroniky, pri ktorej sa inform\u00e1cia pren\u00e1\u0161a pohybom elektr\u00f3nov, v\u00a0spintronike doch\u00e1dza iba k\u00a0zmene spinu (stavu elektr\u00f3nu) a\u00a0nedoch\u00e1dza tak k\u00a0disip\u00e1cii tepla, teda ohrievaniu obvodu. Na rozhran\u00ed medzi topologicky netrivi\u00e1lnymi YSR p\u00e1smi a topologicky trivi\u00e1lnym prostred\u00edm vznikaj\u00fa tzv. Majorana viazan\u00e9 stavy<\/strong>. Tie sa daj\u00fa vyu\u017ei\u0165 ako topologicky chr\u00e1nen\u00e9 qubity v\u00a0kvantov\u00fdch po\u010d\u00edta\u010doch odoln\u00fdch vo\u010di dekoherencii. K\u00a0dekoherencii toti\u017e doch\u00e1dza v\u00a0d\u00f4sledku interakcie qubitu s\u00a0okol\u00edm, \u010do m\u00e1 za n\u00e1sledok znehodnotenie ulo\u017eenej inform\u00e1cie. Je to jeden z\u00a0hlavn\u00fdch technologick\u00fdch probl\u00e9mov, ktor\u00fd br\u00e1ni vytvoreniu prakticky vyu\u017eite\u013en\u00e9ho kvantov\u00e9ho po\u010d\u00edta\u010da.<\/p>\n

Napriek tomu, \u017ee realiz\u00e1cia vy\u0161\u0161ie uvedenej\u00a0 technol\u00f3gie\u00a0 je zatia\u013e ot\u00e1zna, jej pr\u00ednos pre kvantov\u00e9 technol\u00f3gie by bol tak z\u00e1sadn\u00fd, \u017ee sa na jej v\u00fdvoj zamerali nielen akademick\u00e9 in\u0161tit\u00facie, ale aj komer\u010dn\u00e9 spolo\u010dnosti ako napr.\u00a0Microsoft<\/a>\u00a0\u010di\u00a0Nokia Bell labs<\/a>.<\/p>\n

Odkaz na publikovan\u00fa \u0161t\u00fadiu:<\/p>\n

Zhang, G., Samuely, T., Iwahara, I., Ka\u010dmar\u010d\u00edk, J., Wang, C., May, P.W., Jochum, J.K., Onufriienko, O., Szab\u00f3, P., Zhou, S., Samuely, P., Moshchalkov, V.V., Chibotaru, L.V.,\u00a0 Rubahn, H.-G., 2020. Yu-Shiba-Rusinov bands in ferromagnetic superconducting diamond.\u00a0Science Advances<\/em>, 6 (20), eaaz2536
\nhttps:\/\/doi.org\/10.1126\/sciadv.aaz2536<\/a><\/p>\n

Text a foto: prevzat\u00e9 zo str\u00e1nok PF UPJ\u0160<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

V\u00fdskumn\u00e1 skupina z\u00a0ko\u0161ick\u00e9ho\u00a0Centra fyziky n\u00edzkych tepl\u00f4t\u00a0veden\u00e1\u00a0Mgr. Tom\u00e1\u0161om Samuelym, PhD. z\u00a0\u00dastavu fyzik\u00e1lnych vied PF UPJ\u0160 v\u00a0Ko\u0161iciach publikovala v\u00a0najnov\u0161om \u010d\u00edsle prest\u00ed\u017eneho americk\u00e9ho \u010dasopisu\u00a0Science Advances\u00a0svoje v\u00fdsledky experimentov\u00a0na supravodivom…<\/p>\n","protected":false},"author":11,"featured_media":4187,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/4186"}],"collection":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/comments?post=4186"}],"version-history":[{"count":5,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/4186\/revisions"}],"predecessor-version":[{"id":4194,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/posts\/4186\/revisions\/4194"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/media\/4187"}],"wp:attachment":[{"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/media?parent=4186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/categories?post=4186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/websrv.saske.sk\/uef\/wp-json\/wp\/v2\/tags?post=4186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}