Quantum Superposition State Production by Continuous Observations and Feedback

Abstract

We present a protocol for generation of superpositions of states with distinguishable field amplitudes in an optical cavity by quantum nondemolition photon number measurements and coherent feeding of the cavity.Comment: RevTex4, 4 pages, 2 figures. Published in Phys. Rev. Lett. with higher quality figures. The first part of the manuscript, regarding the Fock state generator, has been remove