DocumentCode :
3041006
Title :
Real-time measurement and adjustment of random phase in frequency-nondegenerate entanglement swapping experiment
Author :
Ziru Sang ; Xiao Jiang ; Feng Li ; Han Zhang ; Tianming Zhao ; Ge Jin
Author_Institution :
State Key Lab. of Particle Detection & Electron., Univ. of Sci. & Technol. of China, Hefei, China
fYear :
2012
fDate :
9-15 June 2012
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, a circuit module developed for the experiment of the frequency-nondegenerate photons entanglement swapping is reported. The module transfers the random time interval into level from +1 to - 1 voltage to drive an electro-optic modulator (EOM). This experiment, aiming to entangle the frequency-nondegerate photons that never interacted, is an advanced strategy for quantum communication. The key point of the experiment is to realize the time interval real-time measurement, computation and feedback control. A precision TDC is built in a field programmable gate array (FPGA) with 40ps per LSB (a RMS resolution about 20ps). A programmable look-up table is used as computing unit and the delay time of the module is less than 110ns.
Keywords :
quantum communication; quantum entanglement; random processes; computation control; electro-optic modulator; feedback control; field programmable gate array; frequency-nondegenerate entanglement swapping experiment; frequency-nondegenerate photons entanglement swapping; programmable look-up table; quantum communication; random phase adjustment; random time; time interval real-time measurement; Delay; Feedback control; Field programmable gate arrays; Frequency measurement; Photonics; Real-time systems; FPGA; TDC; computation; entanglement swapping; feedback control; phase adjustment; real-time;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Real Time Conference (RT), 2012 18th IEEE-NPSS
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-1082-6
Type :
conf
DOI :
10.1109/RTC.2012.6418183
Filename :
6418183
Link To Document :
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