{"id":100209,"date":"2025-10-02T19:08:48","date_gmt":"2025-10-02T16:08:48","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=100209"},"modified":"2025-10-02T19:08:48","modified_gmt":"2025-10-02T16:08:48","slug":"fizicienii-au-simulat-o-gaura-neagra-in-laborator-iar-apoi-aceasta-a-inceput-sa-straluceasca","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/fizicienii-au-simulat-o-gaura-neagra-in-laborator-iar-apoi-aceasta-a-inceput-sa-straluceasca\/","title":{"rendered":"Fizicienii au simulat o gaur\u0103 neagr\u0103 \u00een laborator, iar apoi aceasta a \u00eenceput &#8222;s\u0103 str\u0103luceasc\u0103&#8221;"},"content":{"rendered":"<figure id=\"attachment_100210\" aria-describedby=\"caption-attachment-100210\" style=\"width: 348px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/gaura-neagra-7.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-100210\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/gaura-neagra-7.jpg\" alt=\"\" width=\"358\" height=\"297\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/gaura-neagra-7.jpg 358w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2025\/10\/gaura-neagra-7-300x249.jpg 300w\" sizes=\"auto, (max-width: 358px) 100vw, 358px\" \/><\/a><figcaption id=\"caption-attachment-100210\" class=\"wp-caption-text\"><strong>Imagine:<\/strong> generata de AI (<strong>Google Gemini<\/strong>)<\/figcaption><\/figure>\n<p>Un analog al unei g\u0103uri negre ne-ar putea spune c\u00e2teva lucruri despre o radia\u021bie evaziv\u0103 emis\u0103 teoretic de obiectul real. Folosind un lan\u021b de atomi a\u0219eza\u021bi \u00een \u0219ir indian pentru a simula orizontul evenimentelor unei g\u0103uri negre, o echip\u0103 de fizicieni a observat \u00een 2022 echivalentul a ceea ce numim <strong>radia\u021bie Hawking<\/strong> &#8211; particule n\u0103scute din perturb\u0103ri ale fluctua\u021biilor cuantice cauzate de ruptura spa\u021biu-timp a g\u0103urii negre. Acest lucru, spun ei, ar putea ajuta la rezolvarea tensiunii dintre dou\u0103 teorii ireconciliabile (\u00een prezent) pentru descrierea Universului: <strong>teoria general\u0103 a relativit\u0103\u021bii<\/strong> &#8211; care descrie comportamentul gravita\u021biei ca un c\u00e2mp continuu cunoscut sub numele de spa\u021biu-timp \u0219i <strong>mecanica cuantic\u0103 &#8211;<\/strong> care descrie comportamentul particulelor discrete folosind matematica probabilit\u0103\u021bii.<\/p>\n<p>Pentru o teorie unificat\u0103 a gravita\u021biei cuantice care poate fi aplicat\u0103 universal, aceste dou\u0103 teorii trebuie s\u0103 g\u0103seasc\u0103 o modalitate de a se \u00een\u021belege cumva \u015fi ne folosim de <strong>g\u0103urile negre<\/strong> &#8211; posibil cele mai ciudate \u0219i extreme obiecte din Univers. Aceste obiecte masive sunt at\u00e2t de incredibil de dense \u00eenc\u00e2t, la o anumit\u0103 distan\u021b\u0103 de centrul de mas\u0103 al g\u0103urii negre, nicio vitez\u0103 din Univers nu este suficient\u0103 pentru a evada. Nici m\u0103car viteza luminii.\u00a0Aceast\u0103 distan\u021b\u0103, care variaz\u0103 \u00een func\u021bie de masa g\u0103urii negre, se nume\u0219te <strong>orizontul evenimentelor<\/strong>. Odat\u0103 ce un obiect \u00eei traverseaz\u0103 limita, ne putem doar imagina ce se \u00eent\u00e2mpl\u0103, deoarece nimic nu se \u00eentoarce cu informa\u021bii despre soarta sa. Dar \u00een 1974, <strong>Stephen Hawking<\/strong> a propus c\u0103 \u00eentreruperile fluctua\u021biilor cuantice cauzate de orizontul evenimentelor au ca rezultat un tip de radia\u021bie foarte similar radia\u021biei termice. Dac\u0103 aceast\u0103 radia\u021bie Hawking exist\u0103, este mult prea slab\u0103 pentru a o detecta \u00eenc\u0103. Este posibil s\u0103 nu o putem niciodat\u0103 separa din curentul electric static al Universului. Dar \u00eei putem studia propriet\u0103\u021bile cre\u00e2nd analogi ai g\u0103urilor negre \u00een laborator. Acest lucru se mai f\u0103cuse \u0219i \u00eenainte, dar \u00een noiembrie 2022 o echip\u0103 condus\u0103 de Lotte Mertens de la Universitatea din Amsterdam, Olanda, a \u00eencercat ceva nou.<\/p>\n<p>Un lan\u021b unidimensional de atomi a servit drept cale pentru electroni pentru a &#8222;s\u0103ri&#8221; dintr-o pozi\u021bie \u00een alta. Prin ajustarea u\u0219urin\u021bei cu care se poate produce aceast\u0103 s\u0103ritur\u0103, fizicienii au putut face ca anumite propriet\u0103\u021bi s\u0103 dispar\u0103, cre\u00e2nd efectiv un fel de orizont al evenimentelor care interfera cu natura ondulatorie a electronilor. Efectul acestui orizont al evenimentelor false a produs o cre\u0219tere a temperaturii care a corespuns a\u0219tept\u0103rilor teoretice ale unui sistem echivalent de g\u0103uri negre, a spus echipa, dar numai atunci c\u00e2nd o parte a lan\u021bului s-a extins dincolo de orizontul evenimentelor. Aceasta ar putea \u00eensemna c\u0103 \u00eencurc\u0103tura particulelor care se afl\u0103 pe orizontul evenimentelor este esen\u021bial\u0103 \u00een generarea radia\u021biei Hawking.<\/p>\n<p>Radia\u021bia Hawking simulat\u0103 a fost termic\u0103 doar pentru un anumit interval de amplitudini ale saltului \u0219i \u00een cadrul simul\u0103rilor care au \u00eenceput prin imitarea unui tip de spa\u021biu-timp considerat &#8222;plat&#8221;. Acest lucru sugereaz\u0103 c\u0103 radia\u021bia Hawking ar putea fi termic\u0103 doar \u00eentr-o serie de situa\u021bii \u0219i atunci c\u00e2nd exist\u0103 o schimbare \u00een deformarea spa\u021biu-timpului din cauza gravita\u021biei. Nu este clar ce \u00eenseamn\u0103 acest lucru pentru gravita\u021bia cuantic\u0103, dar modelul ofer\u0103 o modalitate de a studia apari\u021bia radia\u021biei Hawking \u00eentr-un mediu care nu este influen\u021bat de dinamica neobi\u0219nuit\u0103 a form\u0103rii unei g\u0103uri negre. \u0218i, pentru c\u0103 este at\u00e2t de simplu, poate fi folosit \u00eentr-o gam\u0103 larg\u0103 de configura\u021bii experimentale, au spus cercet\u0103torii.<\/p>\n<p><strong>Sursa:<\/strong> studiul \u015ftiin\u0163ific <a href=\"https:\/\/journals.aps.org\/prresearch\/abstract\/10.1103\/PhysRevResearch.4.043084\" target=\"_blank\" rel=\"noopener\"><strong>&#8222;Thermalization by a synthetic horizon&#8221; \/ journal.aps.org<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un analog al unei g\u0103uri negre ne-ar putea spune c\u00e2teva lucruri despre o radia\u021bie evaziv\u0103 emis\u0103 teoretic de obiectul real. Folosind un lan\u021b de atomi a\u0219eza\u021bi \u00een \u0219ir indian pentru a simula orizontul evenimentelor unei g\u0103uri negre, o echip\u0103 de &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Fizicienii au simulat o gaur\u0103 neagr\u0103 \u00een laborator, iar apoi aceasta a \u00eenceput &#8222;s\u0103 str\u0103luceasc\u0103&#8221;\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/fizicienii-au-simulat-o-gaura-neagra-in-laborator-iar-apoi-aceasta-a-inceput-sa-straluceasca\/#more-100209\" aria-label=\"Cite\u0219te mai multe despre Fizicienii au simulat o gaur\u0103 neagr\u0103 \u00een laborator, iar apoi aceasta a \u00eenceput &#8222;s\u0103 str\u0103luceasc\u0103&#8221;\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":100210,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11042],"tags":[6394,346,347,11043,9786,596,1367,4724,8649,429,18508,6790,13121,2501,3203,2358,1104,789,1087,2250,2916],"class_list":["post-100209","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fizica-chimie","tag-amsterdam","tag-atomi","tag-electroni","tag-fizica-chimie","tag-fizicieni","tag-gaura-neagra","tag-gravitatie","tag-laborator","tag-mecanica-cuantica","tag-olanda","tag-orizontul-evenimentelor","tag-particule","tag-radiatia-hawking","tag-spatiu","tag-stephen-hawking","tag-temperatura","tag-teoria-relativitatii","tag-timp","tag-univers","tag-universitate","tag-viteza-luminii","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fizicienii au simulat o gaur\u0103 neagr\u0103 \u00een laborator, iar apoi aceasta a \u00eenceput &quot;s\u0103 str\u0103luceasc\u0103&quot; - Secretele lui Lovendal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lovendal.ro\/wp52\/fizicienii-au-simulat-o-gaura-neagra-in-laborator-iar-apoi-aceasta-a-inceput-sa-straluceasca\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fizicienii au simulat o gaur\u0103 neagr\u0103 \u00een laborator, iar apoi aceasta a \u00eenceput &quot;s\u0103 str\u0103luceasc\u0103&quot;\" \/>\n<meta property=\"og:description\" content=\"Un analog al unei g\u0103uri negre ne-ar putea spune c\u00e2teva lucruri despre o radia\u021bie evaziv\u0103 emis\u0103 teoretic de obiectul real. 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