Demonstration of Non-Deterministic Quantum Logic Operations using Linear Optical Elements

Details Demonstration of Non-Deterministic Quantum Logic Operations using Linear Optical Elements Demonstration of Non-Deterministic Quantum Logic Operations using Linear Optical Elements

2001-09-25

arxiv.org/abs/quant-ph/0109128v2

Phys. Rev. Lett. 88, 257902 (2002)

Physics

Quantum Physics

4 pages, 5 figures; Minor changes

Scientific paper

10.1103/PhysRevLett.88.257902

Knill, Laflamme, and Milburn recently showed that non-deterministic quantum logic operations could be performed using linear optical elements, additional photons (ancilla), and post-selection based on the output of single-photon detectors [Nature 409, 46 (2001)]. 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 (non-destructive) CNOT that succeeds with a probability of 1/4.

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