Quantum state transmission through a spin chain in finite-temperature heat baths

Abstract Transmission of a quantum state is essential for performing quantum information processing tasks. The communication channel will be inevitably immersed in its surrounding environment under realistic conditions. In this paper, we investigate the influence of environment noise on the transmis...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. A, Mathematical and theoretical Vol. 54; no. 15; p. 155303
Main Authors Wang, Zhao-Ming, Ren, Feng-Hua, Luo, Da-Wei, Yan, Zhan-Yuan, Wu, Lian-Ao
Format Journal Article
LanguageEnglish
Published 16.04.2021
Online AccessGet full text

Cover

More Information
Summary:Abstract Transmission of a quantum state is essential for performing quantum information processing tasks. The communication channel will be inevitably immersed in its surrounding environment under realistic conditions. In this paper, we investigate the influence of environment noise on the transmission fidelity when transferring a quantum state through a spin chain. The non-Markovian open system dynamics is systematically analyzed by using the quantum state diffusion equation method. With each spin immersed in its own finite temperature and non-Markovian heat bath, we consider three types of system–bath interaction: dephasing, dissipation and spin-boson. The transmission fidelity is found to decrease with the increasing bath temperature and system–bath coupling strength. Interestingly, we find that the bath non-Markovianity can help enhancing the transmission fidelity.
ISSN:1751-8113
1751-8121
DOI:10.1088/1751-8121/abe751