A novel nondeterministic scheme for a nondestructive two-qubit controlled phase gate with linear optics

2010 ◽  
Vol 374 (4) ◽  
pp. 527-530 ◽  
Author(s):  
Peng Huang ◽  
Yuan Lu ◽  
Guihua Zeng
Keyword(s):  
Linear Optics ◽  
Phase Gate ◽  
Controlled Phase Gate

scholarly journals Linear Optics Controlled-Phase Gate Made Simple

2005 ◽  
Vol 95 (21) ◽  
Author(s):  
Nikolai Kiesel ◽  
Christian Schmid ◽  
Ulrich Weber ◽  
Rupert Ursin ◽  
Harald Weinfurter
Keyword(s):  
Linear Optics ◽  
Phase Gate ◽  
Controlled Phase Gate

scholarly journals Proposal for a destructive controlled phase gate using linear optics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
S. U. Shringarpure ◽  
J. D. Franson
Keyword(s):  
Linear Optics ◽  
Practical Applications ◽  
Control Qubit ◽  
Probability Of Success ◽  
Average Probability ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Target Qubit

AbstractKnill, Laflamme, and Milburn showed that linear optics techniques could be used to implement a nonlinear sign gate. They also showed that two of their nonlinear sign gates could be combined to implement a controlled-phase gate, which has a number of practical applications. Here we describe an alternative implementation of a controlled-phase gate for a single-rail target qubit that only requires the use of a single nonlinear sign gate. This gives a much higher average probability of success when the required ancilla photons are generated using heralding techniques. This implementation of a controlled-phase gate destroys the control qubit, which is acceptable in a number of applications where the control qubit would have been destroyed in any event, such as in a postselection process.

scholarly journals Destructive Controlled-Phase Gate using Linear Optics

2021 ◽  
Author(s):  
S. U. Shringarpure ◽  
J. D. Franson
Keyword(s):  
Linear Optics ◽  
Practical Applications ◽  
Control Qubit ◽  
Probability Of Success ◽  
Average Probability ◽  
Phase Gate ◽  
Controlled Phase Gate

Abstract Knill, Laflamme, and Milburn showed that linear optics techniques could be used to implement a nonlinear sign gate. They also showed that two of their nonlinear sign gates could be combined to implement a controlled-phase gate, which has a number of practical applications. Here we describe an alternative implementation of a controlled-phase gate that only requires the use of a single nonlinear sign gate. This gives a much higher average probability of success when the required ancilla photons are generated using heralding techniques. This implementation of a controlled-phase gate destroys the control qubit, which is acceptable in a number of applications where the control qubit would have been destroyed in any event, such as in a postselection process.

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.

One-step construction of the multiple-qubit Rydberg controlled-phase gate

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
S. L. Su ◽  
H. Z. Shen ◽  
Erjun Liang ◽  
Shou Zhang
Keyword(s):  
One Step ◽  
Phase Gate ◽  
Controlled Phase Gate
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