MODIFIED NONCLASSICAL COHERENT STATE: SQUEEZING, ANTSBUNCHING, SUB-POISSON1AN PHOTON STATISTICS, REALIZATION SCHEME WITH THE x(2)-NONLINEAR!TY, AND GENERATION OF A MACROSCOPIC ENTANGLED STATE

摘要

The nonlinear x(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.