Optical Field Squeezed States and Its Application in the Quantum Communication

Kun Cheng Peng

Squeezed state light is a nonclassical optical field which has extensive potential applications in optical measurement with high sensitivity exceeding the standard quantum limit as well as in optical communications and quantum information with extremely low noise. This has given birth to cross-disciplines of physics and information science. An overview is presented of the generation of squeezed state light fields and their important applications in sub-shot-noise-limit optical measurement and quantum information research.

Horace P. Yuen

Yancheng Zhao, Guoxi Fang

The concept of the squeezed state of light field as well as the theory of realizing quantum optical communication and its experimental mechanism have been given. The principles of the transmitter of the quantum optical communication and the receiver have been introduced and the keypoints of realizing quantum optical communication have been suggested.

Carlton M. Caves

YU Xu-dong

Squeezed light is an important non-classical light field.It is the basis of quantum entanglement and quantum communication and has a very important application value in quantum optics field.In this paper,we utilize stable optical components and simplify the complexity of the generation system of squeezed light,so we could obtain a stable squeezed vacuum light with the squeezed component of 2 dB below shot noise level(SNL) and the anti-squeezed component of 8 dB above SNL by periodically poled potassium titanyl oxygenic phosphate(PPKTP) crystals.The purpose of this paper is to provide a stable generation device of squeezed vacuum light.

A. D. Jannussis, Vasileios Bartzis