A note on invariants and entanglements

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Published 9 July 2001 • Published under licence by IOP Publishing Ltd
, , Citation Sergio Albeverio and Shao-Ming Fei 2001 J. Opt. B: Quantum Semiclass. Opt. 3 223 DOI 10.1088/1464-4266/3/4/305

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Author affiliations

1 Institut für Angewandte Mathematik, Universität Bonn, D-53115 Bonn, Germany

2 Institute of Applied Mathematics, Chinese Academy of Science, Beijing, People's Repulic of China

3 SFB 256; BiBoS; CERFIM (Locarno); Acc.Arch., USI (Mendrisio).

Dates

  1. Received 2 August 2000
  2. Published

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1464-4266/3/4/223

Abstract

Quantum entanglements are studied in terms of the invariants under local unitary transformations. A generalized formula of concurrence for N-dimensional quantum systems is presented. This generalized concurrence has potential applications in studying separability and calculating the entanglement of formation for high-dimensional mixed quantum states.

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