Quantum Metrology: Detection of weak forces using Schrodinger Cat resources

Details Quantum Metrology: Detection of weak forces using Schrodinger Cat resources Quantum Metrology: Detection of weak forces using Schrodinger Cat resources

2003-12-08

arxiv.org/abs/quant-ph/0312063v1

Physics

Quantum Physics

Proceedings of the Sixth International Conference on Quantum Communication, Measurement and Computing, pg 333, ed by J H Shapi

Scientific paper

We investigate the utility of non classical states of simple harmonic oscillators (a superposition of coherent states) for sensitive force detection. We find that like squeezed states a superposition of coherent states allows the detection of displacement measurements at the Heisenberg limit. Entangling many superpositions of coherent states offers a significant advantage over a single mode superposition states with the same mean photon number.

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