Phase Sensitivity of a Mach-Zehnder Quantum Sensor

Details Phase Sensitivity of a Mach-Zehnder Quantum Sensor Phase Sensitivity of a Mach-Zehnder Quantum Sensor

2007-01-31

arxiv.org/abs/quant-ph/0701243v1

Conference proceedings of QCMC2006, The 8th International Conference on Quantum Communication, Measurement, and Computing, Tsu

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

We investigate the dependence of the fidelity of a Mach-Zehnder quantum interferometer on the prior information about the phase, for Fock state input and for maximally entangled (N00N) state input. For no prior information, the fidelity for Fock state input is greater than for N00N state input. In the limit of a narrow distribution describing the prior information, we find that both Fock and N00N state inputs lead to nearly equal fidelity.

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