An Investigation of Leggett’s Inequality

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Kashefi, Maryam | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40003 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Shafiee, Afshin
Abstract:
Quantum correlations are among most intriguing problems in physics. Bell’s inequality which was proved in 1964 provides with us the possibility of comparing the predictions of quantum theory with what an underlying local realistic theory may reproduce for some given observables in correlated states. The violation of Bell’s inequality in practice prohibits the existance of such underlying theories. Yet, it is not clear which of the assumption, i.e., locality or reality is responsible for explaining the experimentally verified violations. In 2003, a Nobel prizewinner A. J. Leggett proved a new inequality in which the locality assumption was not crucial. Here, we explore different aspects of Leggett’s inequality with a specific emphasis on the significance of the reality assumption.
Keywords:
Nonlocality ; Bell Inequality ; Leggett Inequality ; Reality

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