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›› 2009, Vol. 26 ›› Issue (6): 745-748.DOI: 10.7523/j.issn.2095-6134.2009.6.003

• Research Articles • Previous Articles     Next Articles

Leggett inequality and nonlocal realism

LI Jun-Li1, QIAO Cong-Feng1,2   

  1. 1. College of Physical Science, Graduate University of the Chinese Academy of Sciences,Beijing 100049, China;
    2. Theoretical Physics Center for Science Facilities (TPCSF), Beijing 100049, China
  • Received:2009-05-20 Revised:2009-06-03 Online:2009-11-15

Abstract:

Through comparing the Leggett inequality with Bell inequalities, we investigate the nature of the nonlocal term in Leggett inequality and obtain various Leggett inequalities with different powers of the nonlocal term. We find that in different powers of δ the generalized Leggett inequalities correspond to different degrees of bipartite correlation, that is, the degree of correlation can be determined by the power of δ. The violation degrees of the generalized Leggett inequality and the Bell inequality are compared under the circumstance of quantum mechanics. The relations between violation of inequalities and nonlocal term are analyzed.

Key words: Leggett inequality, non-locality, quantum correlations

CLC Number: