Thermal entanglement in Spin-1 biparticle system

Jianping Li

Xian-Ting Liang

In this paper, the generating of entanglement by using some biparticle Bose systems acting on vacuum state are investigated. These systems include two-mode squeezed system, thermal system of a free single particle (where the fictitious tilde system is regarded another particle), and the system of two coupling harmonic oscillators. The technique of integration within an ordered product (IWOP) of operators is used.

N. Canosa, R. Rossignoli

Shuangwei Hu, Jing‐Ling Chen

O. D. Timofeevskaya

In this communication we consider the zero temperature properties of entanglement in free and interacting fermion systems following Bogoliubov’s excitation approach. We investigate spin biparticle entanglement in BCS superconductor ground state of electron gas and in EPS state of 3 He atoms. The relation between pair-distribution functions and biparticle quantum entanglement is discussed.

Qilin Wang, Rongfang Liu, Hong‐Mei Zou +2 more

Abstract In this work, the entanglement dynamics of a moving-biparticle system driven by an external classical field are investigated, where the moving-biparticle system is coupled with a zero temperature common environment. The analytical expressions of the density operator and the entanglement can be obtained by using the dressed-state basis when the total excitation number is one. We also discuss in detail the effects of different parameters on the entanglement dynamics. The results show that the classical driving can not only protect the entanglement, but also effectively eliminate the influence of the qubit velocity and the detuning on the quantum entanglement.