关键词: 量子光学, 自旋压缩, 单模近似, 旋量玻色－爱因斯坦凝聚

Abstract:

Spin squeezing is an important concept in quantum mechanics, which has recently been found closely related with the criteria of the entanglement in quantum information. In this paper, a theoretical scheme for generating spin squeezing state in spinor Bose-Einstein Condensate (SBEC) with a laser pulse was put forward. Using the single-mode approximation, we obtained the time-dependent wave function of SBEC, and then the analytical expressions of the squeezed angle and spin squeezing parameter. By investigating spin squeezing in SBEC, one see that the spin squeezed state with more squeezing can be generated by increasing coupling strength between laser pulse and the condensate.

Key words: Quantum Optics, Spin squeezing, Single-mode approximation, Spinor Bose-Einstein Condensate