收稿日期: 2009-05-20
修回日期: 2009-06-03
网络出版日期: 2009-11-15
基金资助
国家自然科学基金(10821063,10775179)、 中国科学院重要方向性项目 (KJCX2-yw-N29)和 中国科学院研究生院院长基金项目资助
Leggett inequality and nonlocal realism
Received date: 2009-05-20
Revised date: 2009-06-03
Online published: 2009-11-15
通过比较Leggett不等式和Bell不等式,研究了Leggett不等式中非定域项的特点,给出了非定域项在不同幂次下Leggett不等式的形式.发现在非定域项不同的幂次下,推广的Leggett不等式对应着不同强弱的两体关联,即关联的大小可由幂次δ的取值来标定.并对推广的Leggett不等式和Bell不等式在量子力学下破坏大小进行了比较,分析了破坏大小和非定域项的关系.
关键词： Leggett不等式; 非定域性; 量子关联
李军利 , 乔从丰 . Leggett不等式和非定域实在论[J]. 中国科学院大学学报, 2009 , 26(6) : 745 -748 . DOI: 10.7523/j.issn.2095-6134.2009.6.003
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
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