{"id":16147,"date":"2011-04-08T15:16:55","date_gmt":"2011-04-08T12:16:55","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=16147"},"modified":"2011-04-12T14:28:41","modified_gmt":"2011-04-12T11:28:41","slug":"huvasti-elektronid-voolavatest-aatomitest-valmistatud-vooluring","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=16147","title":{"rendered":"H\u00fcvasti elektronid? Voolavatest aatomitest valmistatud vooluring"},"content":{"rendered":"<p><strong>Aeg jootekolb pensionile saata? K\u00f5rvaloleval pildil kujutatud <a href=\"http:\/\/en.wikipedia.org\/wiki\/Atomtronics\">aatomtroonilises <\/a>vooluringis ei liigu ringi mitte elektronid vaid aatomid. Selliste vooluringide abil v\u00f5iks tulevikus luua uusi, \u00fclitundlikke <a href=\"http:\/\/en.wikipedia.org\/wiki\/Gyroscope\">g\u00fcroskoope<\/a>.<\/strong><\/p>\n<p><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/04\/dn20351-1_300.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-16148\" title=\"dn20351-1_300\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/04\/dn20351-1_300.jpg\" alt=\"Kui aatompilved l\u00e4hevad vooluga kaasa. Pilt: JQI\/NIST\" width=\"300\" height=\"229\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/04\/dn20351-1_300.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/04\/dn20351-1_300-250x190.jpg 250w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Ka varem on suudetud panna aatomeid liikuma \u00fchest punktist teise. Et panna neid aga liikuma ringi, jahutas Kevin Wright koos kolleegidega maha 100 000 naatriumi aatomit nii, et nad moodustasid <a href=\"http:\/\/en.wikipedia.org\/wiki\/Bose-einstein_condensate\">Bose-Einsteini kondensaadi <\/a>&#8211; aatomitest koosnev kogu, mis k\u00e4itub kui \u00fcksik ja sidus kvantobjekt, kirjutab <a href=\"http:\/\/www.newscientist.com\/article\/dn20351-byebye-electrons-circuit-made-from-flowing-atoms.html\">NewScientist.com<\/a>.<\/p>\n<p>Teadlased kasutasid kondensaadi toroidi l\u00f5ksup\u00fc\u00fcdmiseks keerulist laserkiirte kogumit. Lisaks andis veel \u00fcks laserkiirte paar, millest \u00fcks p\u00f6\u00f6rles ringi, aatomitele just nii palju energiat, et nad liiguksid \u00fchiselt r\u00f5ngas ringi, kuid et kondensaat oma koherentsust ei kaotaks.<\/p>\n<p>See aatomite tsirkulatsioon toimis 40 sekundi jooksul &#8211; neli korda kauem kui \u00fcheski varasemas eksperimendis.<\/p>\n<p>Voolavad aatomid k\u00e4ituvad kui h\u00f5\u00f5rdumiseta <a href=\"http:\/\/en.wikipedia.org\/wiki\/Superfluid\">supervedelikud<\/a>, mis on v\u00e4ga tundlikud p\u00f6\u00f6ramisele, mist\u00f5ttu seesuguseid aatomtroonilisi tsirkulatsioone saaks kasutada \u00fclitundlikes g\u00fcroskoopides, s\u00f5nas Wright.<\/p>\n<p>Samuti sulgesid teadlased hetkeks osa toroidist, takistades sellega aatomite voolu, kuid mille t\u00f5ttu nad ka t\u00e4iesti seisma ei j\u00e4\u00e4nud. Elektrilistes vooluringides on sellele s\u00fcsteemile sarnaseim analoog tunnelkontakt &#8211; kahe \u00fclijuhi vahelist vahet \u00fcletav vool. Selline kontakt on aluseks \u00fclijuhtivatele kvantinterferents seadmetele(superconducting quantum interference devices ehk\u00a0<a href=\"http:\/\/en.wikipedia.org\/wiki\/SQUID\">SQUIDS<\/a>), mida kasutatakse \u00fclitundlike magnetv\u00e4ljade m\u00f5\u00f5tmisel.<\/p>\n<p>Queenslandi \u00dclikooli f\u00fc\u00fcsik <strong>Matthew Davise<\/strong> s\u00f5nul on antud uurimust\u00f6\u00f6 muljetavaldav ning ta n\u00f5ustub, et see v\u00f5ib tulevikus viia praktiliste seadmeteni, mis on p\u00f6\u00f6rlevate gravitatsioonij\u00f5udude suhtes erakordselt tundlikud.<\/p>\n<p><a href=\"http:\/\/www.newscientist.com\/article\/dn20351-byebye-electrons-circuit-made-from-flowing-atoms.html\">Allikas<\/a><\/p>\n<p>Teadusartikkel: \u00a0&#8220;<a href=\"http:\/\/prl.aps.org\/abstract\/PRL\/v106\/i13\/e130401\">Superflow in a Toroidal Bose-Einstein Condensate: An Atom Circuit with a Tunable Weak Link<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aeg jootekolb pensionile saata? K\u00f5rvaloleval pildil kujutatud aatomtroonilises vooluringis ei liigu ringi mitte elektronid vaid aatomid. Selliste vooluringide abil v\u00f5iks tulevikus luua uusi, \u00fclitundlikke g\u00fcroskoope. Ka varem on suudetud panna aatomeid liikuma \u00fchest punktist teise. Et panna neid aga liikuma ringi, jahutas Kevin Wright koos kolleegidega maha 100 000 naatriumi aatomit nii, et nad moodustasid [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[31,16],"tags":[],"class_list":{"0":"post-16147","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rakenduslik-teadus","7":"category-teadusuudis","8":"entry","9":"has-post-thumbnail"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/16147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16147"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/16147\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}