arXiv subjects

Yu-Xia Xie

Publications and source records attributed to Yu-Xia Xie.

2 recordsLinked to original sources

arXiv2013

Measurement-induced nonlocality in the anisotropic Heisenberg chain

Quantum correlations are essential for quantum information processing. Measurement-induced nonlocality (MIN) which is defined based on the projective measurement is a good measure of quantum correlation, and is favored for its potential applications. We investigate here behaviors of the geometric and entropic MIN in the two-qubit Heisenberg XY chain, and reveal effects of the anisotropic parameter $γ$ as well as the external magnetic field $B$ on strength of them. Our results show that both $γ$ and $B$ can serve as efficient controlling parameters for tuning the MIN in the XY chain.

quant-ph↗

arXiv2012

Improving teleportation fidelity in structured reservoirs

Seeking flexible methods to control quantum teleportation in open systems is an important task of quantum communication. In this paper, we study how the super-Ohmic, Ohmic and sub-Ohmic reservoirs affect teleportation of a general one-qubit state. The results revealed that the structures of the reservoirs play a decisive role on quality of teleportation. Particularly, the fidelity of teleportation may be improved by the strong backaction of the non-Markovian memory effects of the reservoir. The physical mechanism responsible for this improvement are determined.

quant-ph↗