General multimode sum-squeezing

Nguyen Ba An, Vo Tinh

Lei Jianping

Aim To study of the property of the higher-power sum-squeezing of the generalized electrical-field of multimode functional superposition state light field with the superposition of four unsymmetrical quantum states in medium.Method By using the whole quantum multimode high-order squeezing state theory.Result Under certain conditions,the generalized electrical-field of multimode functional superposition state light field in medium shows the higher-power sum-squeezing.Conclusion The squeezing extent of the higher-order sum-squeezing shown in the generalized electrical-field of multimode functional superposition state light field in the medium is connected with squeezing power number,the intensity of the coherent state light field of the single mode,and the coefficient of the gain dielectric or the absorption dielectric.

Mark S. Hillery

Yang Zhi-yong

Utilized the general theory of multimode squeezed state, the squeezing properties of a new kind of multimode superposition state which composed by multimode functional coherent state and multimode functional imaginary coherent state is studied, and it is found that, when the products of sum-number of cavity-modes and squeezing number is an even number, the state can present equal-power sum squeezing effect in some special equal-phase-surface; The spatial distribution of classical intensity of the light-field has a direct influence upon the squeezed degree and the squeezed depth of generalized nonlinear equal-power sum-squeezing of the state ,and with the change of the spatial distribution of classical intensity of each mode, the squeezed degree and the squeezed depth of each mode of the state are anisotropic in spatial distribution.

József Janszky, Yu. Ya. Yushin

Jiliang Zhang

In this paper,the multimode squeezed state theory established by yang Zhiyong and Hou Xun and published in Acta Photonica Sinica is utilized to study the effects of Generalized nonlinear N-th power sum squeezing is seventh kind of Multimode superposition state light field which is composed of the linear superpositions of multimode coherent state and contrary state of multimode imaginary coherent state . It is found that under the conditions of the products q ·N=2p and p=2m+l(m=0,1,2,3, …)where q represents the cavity-mode number and N represents the squeezing power number,while some certain quantization conditions are satisfied by the initial phase sum of each mode,and while the mixing phase sum + made of the initial phase difference( ) between the two components of the state and the mean photon number of each multimode coherent state light field mentioned above changes continuously in the foxed and closed region,the state can always present the effects of generalized nonlinear N-th power sum squeezing that chandes periodically.This shows that the state is a typical multimode nonchasical light field.