Concurrence for infinite-dimensional quantum systems

  • Authors:

  • Yu Guo;Jinchuan Hou;Yuncai Wang

  • Affiliations:

  • Department of Mathematics, Shanxi Datong University, Datong, China 037009 and Department of Physics and Optoelectronics, Institute of Optoelectronic Engineering, Taiyuan University of Technology, ...;Department of Mathematics, Taiyuan University of Technology, Taiyuan, China 030024;Department of Physics and Optoelectronics, Institute of Optoelectronic Engineering, Taiyuan University of Technology, Taiyuan, China 030024

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

Concurrence is an important entanglement measure for states in finite-dimensional quantum systems that was explored intensively in the last decade. In this paper, we extend the concept of concurrence to infinite-dimensional bipartite systems and show that it is continuous and does not increase under local operation and classical communication.