{"id":28738,"date":"2019-03-16T20:54:00","date_gmt":"2019-03-16T13:54:00","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=28738"},"modified":"2021-10-03T20:55:53","modified_gmt":"2021-10-03T13:55:53","slug":"nghien-cuu-dao-nguoc-thoi-gian-bang-may-tinh-luong-tu","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/nghien-cuu-dao-nguoc-thoi-gian-bang-may-tinh-luong-tu\/","title":{"rendered":"Nghi\u00ean c\u1ee9u \u0111\u1ea3o ng\u01b0\u1ee3c th\u1eddi gian b\u1eb1ng m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed"},"content":{"rendered":"\n

C\u00e1c nh\u00e0 khoa h\u1ecdc Nga, M\u1ef9 v\u00e0 Th\u1ee5y S\u0129 v\u1eeba th\u1ef1c hi\u1ec7n nghi\u00ean c\u1ee9u \u0111\u1ea3o ng\u01b0\u1ee3c th\u1eddi gian b\u1eb1ng m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed, \u0111i\u1ec1u nghe c\u00f3 v\u1ebb m\u00e2u thu\u1eabn v\u1edbi nhi\u1ec1u \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd c\u01a1 b\u1ea3n.<\/p>\n\n\n\n

\"IBM<\/td><\/tr>
IBM Q, m\u1ed9t trong c\u00e1c m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed hi\u1ec7n \u0111\u1ea1i nh\u1ea5t th\u1ebf gi\u1edbi\u1ea2NH: IBM<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Theo The Independent<\/em>, gi\u1edbi khoa h\u1ecdc v\u1eeba s\u1eed d\u1ee5ng \u0111i\u1ec7n t\u1eed (electron) v\u00e0 th\u1ebf gi\u1edbi<\/a> l\u01b0\u1ee3ng t\u1eed k\u1ef3 l\u1ea1 \u0111\u1ec3 quay ng\u01b0\u1ee3c th\u1eddi gian trong th\u00ed nghi\u1ec7m \u0111\u00e1nh d\u1ea5u b\u01b0\u1edbc ti\u1ebfn l\u1edbn v\u1ec1 s\u1ef1 hi\u1ec3u bi\u1ebft c\u1ee7a con ng\u01b0\u1eddi xung quanh m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed.<\/p>\n\n\n\n

B\u1ea5t c\u1ee9 ai theo d\u00f5i m\u00e1y t\u00ednh \u0111\u1ec1u c\u00f3 th\u1ec3 th\u1ea5y s\u1ef1 ki\u1ec7n x\u1ea3y ra nh\u01b0 th\u1ec3 th\u1eddi gian \u0111\u01b0\u1ee3c quay ng\u01b0\u1ee3c. C\u00e1c nh\u00e0 khoa h\u1ecdc th\u1ef1c hi\u1ec7n th\u00ed nghi\u1ec7m \u0111\u1ebfn t\u1eeb Vi\u1ec7n V\u1eadt l\u00fd v\u00e0 C\u00f4ng ngh\u1ec7<\/a> Moscow (MIPT), M\u1ef9 v\u00e0 Th\u1ee5y S\u0129. H\u1ecd k\u1ef3 v\u1ecdng k\u1ef9 thu\u1eadt n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, tr\u1edf n\u00ean \u0111\u00e1ng tin c\u1eady v\u00e0 ch\u00ednh x\u00e1c h\u01a1n theo th\u1eddi gian.<\/p>\n\n\n\n

\"Nghi\u00ean<\/a><\/figure>\n\n\n\n

TIN LI\u00caN QUAN<\/h4>\n\n\n\n

Tr\u01b0\u1edfng nh\u00f3m nghi\u00ean c\u1ee9u, ti\u1ebfn s\u0129 Gordey Lesovik, ng\u01b0\u1eddi \u0111\u1ee9ng \u0111\u1ea7u ph\u00f2ng th\u00ed nghi\u1ec7m V\u1eadt l\u00fd Th\u00f4ng tin L\u01b0\u1ee3ng t\u1eed t\u1ea1i MIPT cho hay: \u201cCh\u00fang t\u00f4i t\u1ea1o ra m\u1ed9t tr\u1ea1ng th\u00e1i ph\u00e1t tri\u1ec3n theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i v\u1edbi m\u0169i t\u00ean nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c c\u1ee7a th\u1eddi gian\u201d. \u201cC\u1ed7 m\u00e1y th\u1eddi gian\u201d \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 trong b\u00e0i vi\u1ebft tr\u00ean t\u1ea1p ch\u00ed Scientific Reports bao g\u1ed3m m\u1ed9t m\u00e1y t\u00ednh \u0111i\u1ec7n t\u1eed th\u00f4 s\u01a1 t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u electron \u201cqubit\u201d.<\/p>\n\n\n\n

Qubit l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb th\u00f4ng tin, \u0111\u01b0\u1ee3c di\u1ec5n t\u1ea3 b\u1eb1ng 1, 0 ho\u1eb7c h\u1ed7n h\u1ee3p c\u1ee7a c\u1ea3 hai. Trong th\u00ed nghi\u1ec7m, \u201cch\u01b0\u01a1ng tr\u00ecnh ti\u1ebfn h\u00f3a\u201d \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n khi\u1ebfn qubit tr\u1edf th\u00e0nh m\u00f4 h\u00ecnh thay \u0111\u1ed5i ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p c\u1ee7a nh\u1eefng s\u1ed1 0 v\u00e0 1. Trong qu\u00e1 tr\u00ecnh n\u00e0y, tr\u1eadt t\u1ef1 bi\u1ebfn m\u1ea5t. Sau \u0111\u00f3, m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh kh\u00e1c \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee7a\u00a0m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed<\/a>\u00a0theo c\u00e1ch \u201c\u0111i ng\u01b0\u1ee3c\u201d t\u1eeb h\u1ed7n lo\u1ea1n sang tr\u1eadt t\u1ef1. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1c qubit \u0111\u00e3 quay tr\u1edf l\u1ea1i xu\u1ea5t ph\u00e1t \u0111i\u1ec3m c\u1ee7a n\u00f3.<\/p>\n\n\n\n

H\u1ea7u h\u1ebft \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd \u0111i \u0111\u01b0\u1ee3c theo c\u1ea3 hai chi\u1ec1u, t\u01b0\u01a1ng lai v\u00e0 qu\u00e1 kh\u1ee9. \u0110\u01a1n c\u1eed n\u1ebfu b\u1ea1n xem video c\u1ee7a qu\u1ea3 b\u00f3ng bi-da ch\u1ea1m m\u1ed9t qu\u1ea3 b\u00f3ng bi-da kh\u00e1c, r\u1ed3i tua ng\u01b0\u1ee3c video, c\u00e1c qu\u00e1 tr\u00ecnh v\u1eadt l\u00fd \u0111\u1ec1u c\u00f3 ngh\u0129a v\u00e0 kh\u00f4ng th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c h\u01b0\u1edbng n\u00e0o l\u00e0 \u0111\u00fang \u1edf c\u1ea5p \u0111\u1ed9 v\u1eadt l\u00fd.<\/p>\n\n\n\n

Song v\u0169 tr\u1ee5 c\u00f3 quy t\u1eafc ch\u1ec9 \u0111i theo m\u1ed9t c\u00e1ch: \u0110\u1ecbnh lu\u1eadt th\u1ee9 nh\u00ec c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc, m\u00f4 t\u1ea3 s\u1ef1 ti\u1ebfn tri\u1ec3n t\u1eeb tr\u1eadt t\u1ef1 sang r\u1ed1i lo\u1ea1n. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n xem video v\u1ec1 vi\u1ec7c ai \u0111\u00f3 \u0111\u00e1nh c\u00e1c qu\u1ea3 b\u00f3ng bi-da n\u1eb1m g\u1ecdn g\u00e0ng v\u0103ng sang nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau, r\u1ed3i tua ng\u01b0\u1ee3c l\u1ea1i video \u0111\u00f3 \u0111\u1ec3 xem th\u00ec s\u1ef1 vi\u1ec7c tr\u00f4ng c\u00f3 v\u1ebb v\u00f4 ngh\u0129a.<\/p>\n\n\n\n

Th\u00ed nghi\u1ec7m m\u1edbi gi\u1ed1ng nh\u01b0 vi\u1ec7c t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c qu\u1ea3 b\u00f3ng bi-da b\u1eb1ng m\u1ed9t c\u00fa \u0111\u00e1nh ho\u00e0n h\u1ea3o \u0111\u1ebfn n\u1ed7i ch\u00fang l\u0103n tr\u1edf l\u1ea1i th\u00e0nh m\u1ed9t kim t\u1ef1 th\u00e1p c\u00f3 tr\u1eadt t\u1ef1. Gi\u1edbi khoa h\u1ecdc nh\u1eadn th\u1ea5y r\u1eb1ng ch\u1ec9 v\u1edbi hai qubit, vi\u1ec7c \u201c\u0111\u1ea3o ng\u01b0\u1ee3c th\u1eddi gian\u201d \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u1edbi t\u1ef7 l\u1ec7 th\u00e0nh c\u00f4ng 85%. V\u1edbi ba qubit tr\u1edf l\u00ean, nhi\u1ec1u l\u1ed7i x\u1ea3y ra h\u01a1n v\u00e0 t\u1ef7 l\u1ec7 th\u00e0nh c\u00f4ng l\u00e0 50%.<\/p>\n\n\n\n

T\u1ef7 l\u1ec7 l\u1ed7i d\u1ef1 ki\u1ebfn s\u1ebd gi\u1ea3m khi c\u00e1c nh\u00e0 khoa h\u1ecdc c\u1ea3i thi\u1ec7n \u0111\u1ed9 tinh vi c\u1ee7a thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c d\u00f9ng. Th\u00ed nghi\u1ec7m c\u00f3 ti\u1ec1m n\u0103ng \u0111\u1ea1t \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong vi\u1ec7c ph\u00e1t tri\u1ec3n m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed. Ti\u1ebfn s\u0129 Lesovik chia s\u1ebb: \u201cThu\u1eadt to\u00e1n c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt v\u00e0 s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh vi\u1ebft cho m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed, lo\u1ea1i b\u1ecf nhi\u1ec5u v\u00e0 l\u1ed7i\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c nh\u00e0 khoa h\u1ecdc Nga, M\u1ef9 v\u00e0 Th\u1ee5y S\u0129 v\u1eeba th\u1ef1c hi\u1ec7n nghi\u00ean c\u1ee9u \u0111\u1ea3o ng\u01b0\u1ee3c th\u1eddi gian b\u1eb1ng m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed, \u0111i\u1ec1u nghe c\u00f3 v\u1ebb m\u00e2u thu\u1eabn v\u1edbi nhi\u1ec1u \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd c\u01a1 b\u1ea3n. IBM Q, m\u1ed9t trong c\u00e1c m\u00e1y t\u00ednh l\u01b0\u1ee3ng t\u1eed hi\u1ec7n \u0111\u1ea1i nh\u1ea5t th\u1ebf gi\u1edbi\u1ea2NH: IBM Theo The Independent, gi\u1edbi […]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28738","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28738","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28738"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28738\/revisions"}],"predecessor-version":[{"id":28739,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28738\/revisions\/28739"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}