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Paper Abstract and Keywords
Presentation 2018-06-04 13:20
[Poster Presentation] Time-domain measurement of continuous-variable entanglement using temporally shaped local oscillator pulses
Ami Shinjo (Gakushuin Univ.), Yujiro Eto (AIST), Takuya Katayama, Takuya Hirano (Gakushuin Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) We report the time domain measurement of continuous variable entanglement using a pulsed light source and waveguides. In the time domain measurement we obtained the quadrature amplitude value for each pulse independently using a oscilloscope, therefore it is easy to apply to quantum information processing. However, in the case of pulsed light source there is a problem of temporal-mode matching between local oscillator (LO) pulses used for homodyne detection and entangled pulses. We solved the problem by shortening the duration of the LO pulse by parametric amplification. Furthermore, we made homodyne detectors suitable for the time-domain measurement. The product of measured conditional variances satisfies the EPR-Reid criterion although the significance is not sufficient.
Keyword (in Japanese) (See Japanese page) 
(in English) continuous-variable entanglement / pulsed light / waveguide / homodyne detection / EPR-Reid criterion / / /  
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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) Time-domain measurement of continuous-variable entanglement using temporally shaped local oscillator pulses 
Sub Title (in English)  
Keyword(1) continuous-variable entanglement  
Keyword(2) pulsed light  
Keyword(3) waveguide  
Keyword(4) homodyne detection  
Keyword(5) EPR-Reid criterion  
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1st Author's Name Ami Shinjo  
1st Author's Affiliation Gakushuin University (Gakushuin Univ.)
2nd Author's Name Yujiro Eto  
2nd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
3rd Author's Name Takuya Katayama  
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 2018-06-04 13:20:00 
Presentation Time 90 minutes 
Registration for QIT 
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