Induced coherence with and without induced emission
arXiv:quant-ph/0001118 · doi:10.1016/S0375-9601(00)00314-5
Abstract
We analyze signal coherence in the setup of Wang, Zou and Mandel, where two optical downconverters have indistinct idler modes. Quantum interference, caused by indistinguishability of paths, has a visibility proportional to the transmission amplitude between idlers. Classical interference, caused by induced emission, may be complete for any finite transmission.
3 pages, including 2 postscript figures