资源描述：
《Feynman diagrams versus Fermi-gas Feynman emulator》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、LETTERSPUBLISHEDONLINE:18MARCH2012
2、DOI:10.1038/NPHYS2273FeynmandiagramsversusFermi-gasFeynmanemulatorK.VanHoucke1,2*1,3,E.Kozik4,5,N.Prokof’ev1,6,B.Svistunov1,6,M.J.H.Ku7,,F.WernerA.T.Sommer7,L.W.Cheuk7,A.Schirotzek8andM.W.Zwierlein7Preciseunderstandingofstronglyinteractingfermions
3、,fromwithzero-rangeinteractionsatinfinitescatteringlength46.Thiselectronsinmodernmaterialstonuclearmatter,presentssystemofferstheuniquepossibilitytostringentlytestourtheoryamajorgoalinmodernphysics.However,thetheoreticalagainstaquantumemulatorrealizedherewithtrappedultracolddescri
4、ptionofinteractingFermisystemsisusuallyplagued6LiatomsatabroadFeshbachresonance46.Thisexperimentalbytheintricatequantumstatisticsatplay.Herewepresentvalidationisindispensableforourtheory,basedonresummationofacross-validationbetweenanewtheoreticalapproach,boldapossiblydivergentseri
5、es:althoughthephysicalanswerisshowntodiagrammaticMonteCarlo1–3,andprecisionexperimentsonbeindependentoftheappliedresummationtechniquesuggestingultracoldatoms.Specifically,wecomputeandmeasure,withthattheprocedureisadequateitsmathematicalvalidityremainsunprecedentedprecision,thenorm
6、al-stateequationofstateoftobeproven.Inessence,natureprovidesthe`proof'.Thispresentstheunitarygas,aprototypicalexampleofastronglycorrelatedthefirstalthoughlong-anticipatedcompellingexampleofhowfermionicsystem4–6.Excellentagreementdemonstratesthataultracoldatomscanguidenewmicroscop
7、ictheoriesforstronglyseriesofFeynmandiagramscanbecontrollablyresummedinainteractingquantummatter.non-perturbativeregimeusingbolddiagrammaticMonteCarlo.Atunitarity,thedisappearanceofaninteraction-imposedlengthInhisseminal1981lecture7,RichardFeynmanarguedthatscaleleadstoscaleinvarian
8、ce.Thispropertyrendersthemodelanarbitraryquantumsystemcannotbeefficientlysimulatedrelevantforotherphysicalsystemssuchasneutronmatter.Itwithaclassicaluniversalcomputer,becausegenerally,quantumalsomakesthebalanced(thatis,spin-unpolarized)unitarygasstatisticscanonlybeimitatedwithaclas
9、sicaltheoryifprobabilities
