Demonstration of Nondeterministic Quantum Logic Operations Using Linear Optical Elements
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Type of Work4 pages
Citation of Original PublicationT. B. Pittman, B. C. Jacobs, and J. D. Franson, Demonstration of Nondeterministic Quantum Logic Operations Using Linear Optical Elements, Phys. Rev. Lett. 88, 257902, https://doi.org/10.1103/PhysRevLett.88.257902
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©2002 The American Physical Society
Knill, Laflamme, and Milburn [Nature (London) 409, 46 (2001)] recently showed that nondeterministic quantum logic operations could be performed using linear optical elements, additional photons (ancilla), and postselection based on the output of single-photon detectors. Here we report the experimental demonstration of two logic devices of this kind, a destructive controlled-NOT (CNOT) gate and a quantum parity check. These two devices can be combined with a pair of entangled photons to implement a conventional (nondestructive) CNOT that succeeds with a probability of 1/4.