Journal of Research on Many-body Systems

Journal of Research on Many-body Systems

Effect of environmental noise on coherence of quantum states

Document Type : Full length research Paper

Authors
Marzieh Asoudeh
Nafiseh Biari
Department of Physics, Islamic Azad University, North Tehran Branch, Tehran, Iran
10.22055/jrmbs.2022.17460
Abstract
In this paper, we study the effect of magnetic field and temperature on the amount of coherence in a two spin Heisenberg system. We show that increasing the temperature always leads to lowering the value of this coherence. We also show that the increase of the amount of the magnetic field, leads to increasing the value of coherence up to a certain value, and ultimately it decreases its value to zero. We also study the same problem for three and four spins in the Heisenberg chain and we show that the same features are also observed for three and four-spin systems. The trends show that these features may be general for Heisenberg chains of arbitrary length.
Keywords
Coherence
Quantum channel
Thermal coherence
Heisenberg chain
Subjects
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Journal of Research on Many-body Systems
Volume 12, Issue 1 - Serial Number 32
spring 2022
Spring 2022
Pages 1-9

  • Receive Date 15 June 2021
  • Revise Date 25 November 2021
  • Accept Date 08 February 2022