Eliminating the Unruh effect of relativistic Dirac fields by partial measurements  

作　　者：N A Khan Syed Tahir Amin Munsif Jan 

机构地区：[1]Centro de Física das Universidades do Minho e Porto,Departamento de Física e Astronomia,Faculdade de Ciências,Universidade do Porto,4169-007 Porto,Portugal [2]Departamento de Física,Instituto Superior Técnico,Universidade de Lisboa,Av.Rovisco Pais,1049-001 Lisboa,Portugal [3]CeFEMA,Instituto Superior Técnico,Universidade de Lisboa,Av.Rovisco Pais,1049-001 Lisboa,Portugal [4]Instituto de Telecomunicacoes,LAv.Rovisco Pais,1049-001 Lisboa,Portugal [5]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China

出　　处：《Communications in Theoretical Physics》2020年第12期130-136,共7页理论物理通讯（英文版）

基　　金：supported by the INTERWEAVE project,Erasmus Mundus Action 2 Strand 1 Lot 11,EACEA/42/11 Grant Agreement 2013-2538/001-001 EM Action 2 Partnership Asia-Europe,Fundacao da Ciência e Tecnologia and COMPETE 2020 program in FEDER component(EU),through the projects POCI-01-0145-FEDER-028887 and UID/FIS/04650/2013;the support from the Fundacao da Ciência e Tecnologia(FCT)through a Doctoral Programme in the Physics and Mathematics of Information and the associated scholarship PD/BD/113651/2015 and through the grant UID/CTM/04540/2013;the support of SQIG–Security and Quantum Information Group,under the Fundacao para a Ciência e a Tecnologia(FCT)project UID/EEA/50008/2019;European funds,namely H2020 project SPARTA。

摘　　要：The retrieval of lost entanglement for relatively accelerated fermionic observers of a tripartite system by a partial measurement technique has been investigated.From the prospective of the negativities of one-tangles and theπ-tangle,we show that the degraded entanglement in noninertial frames with single-mode approximation is completely retrieved by an optimal strength of the partial measurement or the partial measurement reversal.In addition,we find that the optimal one-tangle with respect to inertial and noninertial observers turns out to be the same for an optimal strength of partial measurements at q0=0 when two accelerated observers move with infinite acceleration.

关 键 词：entanglement retrieval π-tangle Unruh decoherence 

分 类 号：O413.3[理学—理论物理]