Schr�dinger's cat

Zhao Zhen-shuang

The progress of Schrdinger's cat states in the fields of quantum mechanics and scientific philosophy are summarized.Schrdinger's cat states are relevant to the fundamental problems of quantum mechanics —completeness problems of quantum mechanics,they have immense effects to the development of physics and philosophy.The study of Schrdinger's cat can help us to understand the nature of quantum mechanics.

Matthew F. D. Brown

Ji Ying-Hua, Haimei Luo, Zhiqing Ye +3 more

A scheme is presented for preparing the superposition of coherent states,i.e.,Schr?dinger cat states. These states can be generated by the action of an external impulse functional signal on initial vaccum state of a mesoscopic LC circuit. The nonclassical squeezing properties appear in the circuit under the Schr?dinger cat states.

Chuan-hua Dong, 上海大学物理系,上海 200436

The atomic coherent states will evolve to the atomic Schrdinger cat states at some special times in a low-Q acvity. The fluctuations and higher-order fluctuations of angular momentum in these atomic Schrdinger cat states are discussed. According to the uncertainty principle, the squeezing and higher-order squeezing for atomic angular momentum are investigated. It shows that the atomic Schrdinger cat states can be squeezed to second-and sixth-order, but cannot be squeezed to fourth-order. The properties of squeezing of atomic Schrdinger cat states formed by superposing infinite terms of atomic coherent states are identical with those of atomic coherent states.