scholarly journals Enhancing the W State Fusion Process With a Toffoli Gate and a CNOT Gate via One-Way Quantum Computation and Linear Optics

2015 ◽  
Vol 127 (4) ◽  
pp. 1189-1190 ◽  
Author(s):  
F. Diker ◽  
F. Ozaydin ◽  
M. Arik
Keyword(s):  
Quantum Computation ◽  
W State ◽  
Fusion Process ◽  
Linear Optics ◽  
Cnot Gate ◽  
Toffoli Gate ◽  
State Fusion

scholarly journals Universal quantum computation with shutter logic

2006 ◽  
Vol 6 (6) ◽  
pp. 495-515
Author(s):  
J.C. Garcia-Escartin ◽  
P. Chamorro-Posada
Keyword(s):  
Quantum Computation ◽  
Quantum Logic ◽  
Quantum Computer ◽  
Quantum Memory ◽  
Linear Optics ◽  
Cnot Gate ◽  
Free Model ◽  
Universal Quantum

We show that universal quantum logic can be achieved using only linear optics and a quantum shutter device. With these elements, we design a quantum memory for any number of qubits and a CNOT gate which are the basis of a universal quantum computer. An interaction-free model for a quantum shutter is given.

Efficient linear optics quantum computation

2001 ◽  
Vol 1 (Special) ◽  
pp. 13-19
Author(s):  
G.J. Milburn ◽  
T. Ralph ◽  
A. White ◽  
E. Knill ◽  
R. Laflamme
Keyword(s):  
Quantum Computation ◽  
Single Photon ◽  
Quantum Algorithms ◽  
Optical Nonlinearities ◽  
Linear Optics ◽  
Optical Elements ◽  
Particle Detectors ◽  
Feed Forward ◽  
Single Electrons ◽  
Photon Source

Two qubit gates for photons are generally thought to require exotic materials with huge optical nonlinearities. We show here that, if we accept two qubit gates that only work conditionally, single photon sources, passive linear optics and particle detectors are sufficient for implementing reliable quantum algorithms. The conditional nature of the gates requires feed-forward from the detectors to the optical elements. Without feed forward, non-deterministic quantum computation is possible. We discuss one proposed single photon source based on the surface acoustic wave guiding of single electrons.

scholarly journals Universal remote quantum computation assisted by the cavity input–output process

2015 ◽  
Vol 471 (2184) ◽  
pp. 20150274 ◽  
Author(s):  
Ming-Xing Luo ◽  
Xiaojun Wang
Keyword(s):  
Quantum Computation ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Output Process ◽  
Input Output ◽  
Toffoli Gate ◽  
Classical Communication ◽  
Optical Cavities ◽  
Proposed Model ◽  
Einstein Podolsky Rosen

Quantum computing may provide potential superiority to solve some difficult problems. We propose a scheme for scalable remote quantum computation based on an interface between the photon and the spin of an electron confined in a quantum dot embedded in a microcavity. By successively interacting auxiliary photon pulses with spins charged in optical cavities, a prototypical quantum controlled–controlled flip gate (Toffoli gate) is achieved on a remote three-spin system using only one Einstein–Podolsky–Rosen entanglement, and local operations and classical communication. Our proposed model is shown to be robust to practical noise and experimental imperfections in current cavity–quantum electrodynamics techniques.

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