2001/09/30 by W. J. Munro, K. Nemoto, G. J. Milburn +1 · 3 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.66.023819
published as Phys. Rev. A 66, 023819 (2002) · 6 pages, no figures: New section added on entangled resources. Changes to discussions and conclusion
arxiv created 2002/06/17 · arxiv updated 2009/12/01
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.