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Exploring the entanglement of free spin-(1/2), spin-1 and spin-2 fields
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Exploring the entanglement of free spin-(1/2), spin-1 and spin-2 fields

作者: 杨智;孔令欣 
出版日期:
摘要:Inthisstudy;weexploretheentanglementoffreespin-(1/2);spin-1;andspin-2fields.WestartwithanexampleinvolvingMajoranafieldsin1+1and2+1dimensions.Subsequently;weperformtheBogoliubovtransformationandexpressthevacuumstatewithaparticlepairstateintheconfigurationspace;whichisusedtocalculatetheentropy.Thisclearlydemonstratesthattheentanglemententropyoriginatesfromtheparticlesacrosstheboundary.Finally;wegeneralizethismethodtofreespin-1andspin-2fields.Thesehigherfreemasslessspinfieldshavewellknowncomplicationsowingtogaugeredundancy.Wedealwiththeredundancybygauge-fixinginthelight-conegauge.WeshowthatthisgaugeprovidesanaturaltensorproductstructureintheHilbertspace;whilesurrenderingexplicitLorentzinvariance.WealsousetheBogoliubovtransformationtocalculatetheentropy.Thearealawemergesnaturallybythismethod.
刊名:中国物理C:英文版
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