scholarly journals Linear optical implementation of the two-qubit controlled phase gate with conventional photon detectors

2007 ◽  
Vol 75 (3) ◽  
Author(s):  
Xubo Zou ◽  
ShengLi Zhang ◽  
Ke Li ◽  
Guangcan Guo
Keyword(s):  
Photon Detectors ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Linear Optical

ontrolled implementation of two-photon controlled phase gate within a network

2010 ◽  
Vol 10 (9&10) ◽  
pp. 821-828
Author(s):  
Yan Xia ◽  
Jie Song ◽  
Zhen-Biao Yang ◽  
Shi-Biao Zheng
Keyword(s):  
Quantum Computer ◽  
Photon Detectors ◽  
Optical Elements ◽  
Experimental Realization ◽  
Two Photon ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Linear Optical ◽  
Polarized Photons ◽  
Linear Optical Elements

We propose a protocol to controlled implement the two-photon controlled phase gate within a network by using interference of polarized photons. The realization of this protocol is appealing due to the fact that the quantum state of light is robust against the decoherence, and photons are ideal carriers for transmitting quantum information over long distances. The proposed setup involves simple linear optical elements and the conventional photon detectors that only distinguish the vacuum and nonvacuum Fock number states. This can greatly simplify the experimental realization of a linear optical quantum computer.

scholarly journals Experimental Implementation of the Optimal Linear-Optical Controlled Phase Gate

2011 ◽  
Vol 106 (1) ◽  
Author(s):  
Karel Lemr ◽  
A. Černoch ◽  
J. Soubusta ◽  
K. Kieling ◽  
J. Eisert ◽  
...  
Keyword(s):  
Experimental Implementation ◽  
Optimal Linear ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Linear Optical

scholarly journals Scheme for a linear-optical controlled-phase gate with programmable phase shift

2015 ◽  
Vol 17 (12) ◽  
pp. 125202
Author(s):  
Karel Lemr ◽  
Karol Bartkiewicz ◽  
Antonín Černoch
Keyword(s):  
Phase Shift ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Linear Optical

scholarly journals ALTERNATE SCHEME FOR OPTICAL CLUSTER-STATE GENERATION WITHOUT NUMBER-RESOLVING PHOTON DETECTORS

2007 ◽  
Vol 05 (04) ◽  
pp. 617-626
Author(s):  
MARK M. WILDE ◽  
FEDERICO SPEDALIERI ◽  
JONATHAN P. DOWLING ◽  
HWANG LEE
Keyword(s):  
Quantum Computing ◽  
Cluster State ◽  
Photon Number ◽  
Success Probability ◽  
Photon Detectors ◽  
Alternate Scheme ◽  
State Generation ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Qubit Gate

We design a controlled-phase gate for linear optical quantum computing by using photodetectors that cannot resolve photon number. An intrinsic error-correction circuit corrects errors introduced by the detectors. Our controlled-phase gate has a 1/4 success probability. Recent development in cluster-state quantum computing has shown that a two-qubit gate with non-zero success probability can build an arbitrarily large cluster state only with polynomial overhead. Hence, it is possible to generate optical cluster states without number-resolving detectors and with polynomial overhead.

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