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Paper Abstract and Keywords
Presentation 2018-06-05 14:20
Detection of nonlocality by two spin detectors and its initial condition dependence
Akira Matsumura, Yasusada Nambu (Nagoya Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In the theory of quantum fields or quantum many-body systems, a vacuum state is a fundamental one. The vacuum state of a quantum field or many-body system has quantum entanglement, and it has been known that its entanglement are important not only for field theory and condensed matter theory, but also for cosmology and gravitational physics. To understand how local observers measure the quantum nonlocality, in this research we discuss the detection of quantum nonlocality for a vacuum state by two spin detectors. As a simple model, we consider the vacuum of a massless scalar field and the interaction with the two spin detectors, and solve its time evolution perturbatively. From the obtained state of the two spins, we evaluate the quantum entanglement and the violation of the Bell's inequality between the detectors. We find that the detected quantum nonlocality strongly depends on the initial condition of the detectors, which tells us what experiment to extract the nonlocality are suitable.
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Keyword (in Japanese) (See Japanese page) 
(in English) quantum entanglement / Bell's inequality / local filtering operation / detection of quantum nonlocality / / / /  
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Conference Information
Committee QIT  
Conference Date 2018-06-04 - 2018-06-05 
Place (in Japanese) (See Japanese page) 
Place (in English) ICCH Ran 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2018-06-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Detection of nonlocality by two spin detectors and its initial condition dependence 
Sub Title (in English)  
Keyword(1) quantum entanglement  
Keyword(2) Bell's inequality  
Keyword(3) local filtering operation  
Keyword(4) detection of quantum nonlocality  
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1st Author's Name Akira Matsumura  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Yasusada Nambu  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
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Speaker Author-1 
Date Time 2018-06-05 14:20:00 
Presentation Time 20 minutes 
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