skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Thermal entanglement in the two-qubit Heisenberg XY model under a nonuniform external magnetic field

Abstract

We investigate the thermal entanglement in the two-qubit Heisenberg XY model with a nonuniform magnetic field. Concurrence, the measurement of entanglement, is calculated. The behavior of concurrence is present at three different cases. Contrary to the uniform magnetic field case, we find that the entanglement and the critical temperature T{sub C} may be enhanced under a nonuniform magnetic field.

Authors:
; ;  [1]
  1. Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092 (China)
Publication Date:
OSTI Identifier:
20640417
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 68; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevA.68.044301; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; CORRELATIONS; CRITICAL TEMPERATURE; ENERGY LEVELS; HEISENBERG MODEL; INFORMATION THEORY; MAGNETIC FIELDS; QUANTUM MECHANICS

Citation Formats

Yang, Sun, Yuguang, Chen, and Hong, Chen. Thermal entanglement in the two-qubit Heisenberg XY model under a nonuniform external magnetic field. United States: N. p., 2003. Web. doi:10.1103/PhysRevA.68.044301.
Yang, Sun, Yuguang, Chen, & Hong, Chen. Thermal entanglement in the two-qubit Heisenberg XY model under a nonuniform external magnetic field. United States. https://doi.org/10.1103/PhysRevA.68.044301
Yang, Sun, Yuguang, Chen, and Hong, Chen. 2003. "Thermal entanglement in the two-qubit Heisenberg XY model under a nonuniform external magnetic field". United States. https://doi.org/10.1103/PhysRevA.68.044301.
@article{osti_20640417,
title = {Thermal entanglement in the two-qubit Heisenberg XY model under a nonuniform external magnetic field},
author = {Yang, Sun and Yuguang, Chen and Hong, Chen},
abstractNote = {We investigate the thermal entanglement in the two-qubit Heisenberg XY model with a nonuniform magnetic field. Concurrence, the measurement of entanglement, is calculated. The behavior of concurrence is present at three different cases. Contrary to the uniform magnetic field case, we find that the entanglement and the critical temperature T{sub C} may be enhanced under a nonuniform magnetic field.},
doi = {10.1103/PhysRevA.68.044301},
url = {https://www.osti.gov/biblio/20640417}, journal = {Physical Review. A},
issn = {1050-2947},
number = 4,
volume = 68,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2003},
month = {Wed Oct 01 00:00:00 EDT 2003}
}