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Paper Abstract and Keywords
Presentation 2015-11-24 12:20
Direct observation of pulsed EPR entanglement measured by shaped local oscillators
Ami Shinjo, Sachi Kikuchi, Yujiro Eto, Takuya Hirano (Gakushuin Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) The strong entanglement correlation that satisfies Einstein-Podolsky-Rosen (EPR) criterion seemingly violates the Heisenberg's uncertainty relation, and thus demonstrates the EPR paradox. In recent years, the entanglement is regarded as an essential resource for the quantum communication systems. The pulsed entanglement offers an advantage that entangled pulse system can easily be identified and the demonstration of casual separation is easier. However, pulsed light experiment has difficulty in achieving efficient temporal and spatial mode matching. We used parametric amplification to shape the LO pulse and improved temporal mode matching efficiency. We observed entanglement that satisfies EPR criterion without any correction such as detector's noise.
Keyword (in Japanese) (See Japanese page) 
(in English) continuous-variable entanglement / pulsed light / waveguide / homodyne detection / EPR criterion / / /  
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Conference Information
Committee QIT  
Conference Date 2015-11-24 - 2015-11-25 
Place (in Japanese) (See Japanese page) 
Place (in English) NTT Atsugi R&D center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2015-11-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Direct observation of pulsed EPR entanglement measured by shaped local oscillators 
Sub Title (in English)  
Keyword(1) continuous-variable entanglement  
Keyword(2) pulsed light  
Keyword(3) waveguide  
Keyword(4) homodyne detection  
Keyword(5) EPR criterion  
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1st Author's Name Ami Shinjo  
1st Author's Affiliation Gakushuin University (Gakushuin Univ.)
2nd Author's Name Sachi Kikuchi  
2nd Author's Affiliation Gakushuin University (Gakushuin Univ.)
3rd Author's Name Yujiro Eto  
3rd Author's Affiliation Gakushuin University (Gakushuin Univ.)
4th Author's Name Takuya Hirano  
4th Author's Affiliation Gakushuin University (Gakushuin Univ.)
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Speaker Author-1 
Date Time 2015-11-24 12:20:00 
Presentation Time 20 minutes 
Registration for QIT 
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