Using a single-mode approximation,we carry out the entanglement measures,e.g.,the negativity and von Neumann entropy when a tetrapartite generalized GHZ state is treated in a noninertial frame,but only uniform acceleration is consid-ered for simplicity.In terms of explicit negativity calculated,we notice that the difference between the algebraic average π4 and geometric average Π4 is very small with the increasing accelerated observers and they are totally equal when all four qubits are accelerated simultaneously.The entanglement properties are discussed from one accelerated observer to all four accelerated observers.It is shown that the entanglement still exists even if the acceleration parameter r goes to infinity.It is interesting to discover that all 1-1 tangles are equal to zero,but 1-3 and 2-2 tangles always decrease when the acceleration parameter r increases.We also study the von Neumann entropy and find that it increases with the number of the accelerated observers.In addition,we find that the von Neumann entropy SABCDI,SABCIDI,SABICIDI and SAIBICIDI always decrease with the controllable angle θ,while the entropies S3-3 non,S3-2 non,S3-1 non and S3-0 non first increase with the angle θand then decrease with it.

Qian Dong;R.Santana Carrillo;Guo-Hua Sun;Shi-Hai Dong

Centro de Investigación en Computación,Instituto Politécnico Nacional,UPALM,CDMX 07738,Mexico;Catedrática CONACyT,Centro de Investigación en Computación,Instituto Politécnico Nacional,UPALM,CDMX 07738,Mexico;Research Center for Quantum Physics,Huzhou University,Huzhou 313000,China;Laboratorio de Información Cuántica,CIDETEC,Instituto Politécnico Nacional,UPALM,CDMX 07700,Mexico

中国物理B（英文版）

[1]Qian Dong;R.Santana Carrillo;Guo-Hua Sun;Shi-Hai Dong-.Tetrapartite entanglement measures of generalized GHZ state in the noninertial frames)[J].中国物理B（英文版）,2022(03):190-196

Tetrapartite,noninertial,tetrapartite,SABCDI,SABCIDI,SABICIDI,SAIBICIDI

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