1203.0199 (G. W. Lin et al.)

Quantum Nondemolition Measurement and Preparation of Fock States with
Electromagnetically Induced Transparency in an Optical Cavity    [PDF]

G. W. Lin, Y. P. Niu, T. Huang, X. M. Lin, Z. Y. Wang, S. Q. Gong

We propose a technique for quantum nondemolition (QND) measurement and preparation of fock states by dynamics of electromagnetically induced transparency (EIT). An atomic medium trapped in an optical cavity is driven by two continuous-wave classical fields under steady-state EIT. The weak coherent fields are sequently injected into the cavity. During the process of photons passing through the cavity, a measurement on the changes of absorption loss of the probe field will be used for QND measurement of the small photon number, and thus create photon fock states, in particular single-photon states, in a heralded way.

View original: http://arxiv.org/abs/1203.0199