State preparation by photon filtering
arXiv:quant-ph/9906077 · doi:10.1002/(SICI)1521-3978(200005)48:5/7<671::AID-PROP671>3.0.CO;2-G
Abstract
We propose a setup capable of generating Fock states of a single mode radiation field. The scheme is based on coupling the signal field to a ring cavity through cross-Kerr phase modulation, and on conditional ON-OFF photodetection at the output cavity mode. The same setup allows to prepare selected superpositions of Fock states and entangled two-mode states. Remarkably, the detector's quantum efficiency does not affect the reliability of the state synthesis.
Paper submitted to the proceedings of the III Adriatico Research Conference on Quantum Interferometry, ICTP, March 1-5,1999. 9 pages, 10 eps figures