Weak force detection with superposed coherent states

Details Weak force detection with superposed coherent states Weak force detection with superposed coherent states

2001-09-11

arxiv.org/abs/quant-ph/0109049v2

Phys. Rev. A 66, 023819 (2002)

Physics

Quantum Physics

6 pages, no figures: New section added on entangled resources. Changes to discussions and conclusion

Scientific paper

10.1103/PhysRevA.66.023819

We investigate the utility of non classical states of simple harmonic oscillators, particularly a superposition of coherent states, for sensitive force detection. We find that like squeezed states a superposition of coherent states allows 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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