BELLS INEQUALITIES AND DENSITY-MATRICES - REVEALING HIDDEN NONLOCALITY

被引:246
作者
POPESCU, S [1 ]
机构
[1] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL
关键词
D O I
10.1103/PhysRevLett.74.2619
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Standard Bell inequalities apply to correlations arising when two or more macroscopically separated systems are each subjected to a single ideal measurement. While these inequalities demonstrate that quantum mechanics and local hidden variable theories yield incompatible predictions for pure states, they fail for mixed states: For mixed states, correlations arising from a single ideal measurement on each system may obey standard Bell inequalities, yet when each system is subjected to a sequence of ideal measurements the correlations are nonlocal. For some situations even this last procedure fails, and we must consider more complex ("nonideal") measurements. © 1995 The American Physical Society.
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页码:2619 / 2622
页数:4
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