Physics – Quantum Physics
Scientific paper
2004-11-16
J. Opt. B: Quantum Semiclass. Opt. 7 82-86, 2005
Physics
Quantum Physics
5 pages, 7 figures (published version)
Scientific paper
10.1088/1464-4266/7/2/008
We present a scheme for non-deterministically approximating photon number resolving detectors using non-discriminating detectors. The model is simple in construction and employs very few physical resources. Despite its non-determinism, the proposal may nonetheless be suitable for use in some quantum optics experiments in which non-determinism can be tolerated. We analyze the detection scheme in the context of an optical implementation of the controlled-NOT gate, an inherently non-deterministic device. This allows the gate's success probability to be traded away for improved gate fidelity, assuming high efficiency detectors. The scheme is compared to two other proposals, both deterministic, for approximating discriminating detectors using non-discriminating detectors: the cascade and time division multiplexing schemes.
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