MODIFIED NONCLASSICAL COHERENT STATE: SQUEEZING, ANTIBUNCHING, SUB-POISSONIAN PHOTON STATISTICS, REALIZATION SCHEME WITH THE \chi ⁽²⁾-NONLINEARITY, AND GENERATION OF A MACROSCOPIC ENTANGLED STATE
Podoshvedov S.A.

Received: August 17, 2006

PACS: 42.50.Dv

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The nonlinear χ ⁽²⁾ Mach - Zehnder interferometer is proposed as a device for conditional generation of a modified coherent nonclassical state. We show that the generated macroscopic state exhibits nonclassical effects, such as squeezing, photon antibunching, and sub-Poissonian statistics. The modified coherent state generates a macroscopic entangled state. The scheme works without the photon number resolving detection but requires high-efficiency photodetectors. We explain a mechanism of generation of the modified coherent nonclassical state.