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由多模奇偶相干态组成的第种四态叠加多模叠加态光场的等阶N次方Y压缩
引用本文:杨志勇,许定国,张继良,薛琳娜.由多模奇偶相干态组成的第种四态叠加多模叠加态光场的等阶N次方Y压缩[J].光子学报,2001,30(5):533-538.
作者姓名:杨志勇  许定国  张继良  薛琳娜
作者单位:1. 西北大学光子学与光子技术研究所,西北大学光电子技术省级重点实验室,,西北大学现代物理研究所
2. 西北大学光子学与光子技术研究所,西北大学光电子技术省级重点实验室,商洛师专量子光学与量子信息研究所,商洛师专物理系,
3. 商洛师专量子光学与量子信息研究所,商洛师专物理系,
4. 延安大学物理系
基金项目:陕西省自然科学基金(2000 SL10)、陕西省教育厅专项科研基金(00JK115)和商洛师范专科学校科学研究基金资助项目
摘    要:本文根据量子力学中的线性叠加原理,构造了由多模复共轭奇相干态与多模复共轭偶相干态所组成的第Ⅱ种四态叠加多模叠加态光场|Ψo,e(4)Ⅱ>q.利用多模压缩态理论,研究了态|Ψo,e(4)Ⅱ>q的等阶N次方Y压缩特性.结果发现:1)多模叠加态光场|Ψo,e(4)Ⅱ>q中,压缩阶数N为偶数时,只存在等阶N-Y最小测不准态;2)多模叠加态光场|Ψo,e(4)Ⅱ>q,在压缩阶数为奇数时,随着腔模总数q、态间相位差(θeo)、各模初相位φj以及态的几率幅值re和ro及平均光子数Rj2等取不同的组合定值时,可呈现以下几种状态:①等阶N-Y最小测不准态、②“半相干态”、③“半压缩态”;3)本文构造的多模叠加态|Ψo,e(4)Ⅱ>q与文献17、18研究的多模叠加态|Ψo,e(4)Ⅰ>q在相同的条件下呈现出完全相同的压缩特性,故态|Ψo,e(4)Ⅱ>q与态|Ψo,e(4)Ⅰ>q之间存在着“压缩简并”现象.

关 键 词:“半相干态”  “半压缩态”  “压缩简并”  等阶N-Y最小测不准态  等阶N次方Y压缩  四态叠加  多模叠加态光场
收稿时间:2000-10-05
修稿时间:2000年10月5日

EQUAL-ORDER N-TH POWER Y-SQUEEZING OF THE SECOND FOUR-STATE SUPERIMPOSITION MULTI-MODE SUPERIMPOSITION STATE LIGHT FIELD COMPOSED BY MULTI-MODE ODD AND EVEN COHERENT STATE LIGHT FIELD
Xu Dingguo.EQUAL-ORDER N-TH POWER Y-SQUEEZING OF THE SECOND FOUR-STATE SUPERIMPOSITION MULTI-MODE SUPERIMPOSITION STATE LIGHT FIELD COMPOSED BY MULTI-MODE ODD AND EVEN COHERENT STATE LIGHT FIELD[J].Acta Photonica Sinica,2001,30(5):533-538.
Authors:Xu Dingguo
Institution:1. Institute of Quantum Optics & Quantum Information Scionce, and Department of Physics Shanglao Normal College, Shangzhou 726000;2. Yan’an University Physics Department, Yan’an 716000;3. Institute of Photonics & Photon-Technology, and Provincial Key Laboratory of Photoelectronic Techology, Northwest University, Xi’an 710069;4. Institute of Modern Physics, Northwest University, Xi’an 710069
Abstract:Based on the linear superimposition theory in quantum machanics,the second four-state superinposition mulit-mode superimposition state light |Ψ(4)o,e,Ⅱ〉q composed by multi-mode compless cojugation odd and even coherent state light field are constituted.By using multi-mode state theory which is proposed by Yang Zhiyong and Hou Xun,the properties of the equal-order N-th power Y-squeezing of state |Ψ(4)o,e,Ⅱ〉q is studied in detail.It is found:1)When squeezing order N is an even number,state |Ψ(4)o,e,Ⅱ〉q always presents equal order N-Y minimum uncertainty state;2)When N is odd,the cavity order sum q,the phase difference between states (θe-θo),the initial phase of each vertical φj,the probability amplitude re,ro and the average photonic number R2j take different fixed value,state |Ψ(4)o,e,Ⅱ〉q presents the following effect:①equal order N-Y minium uncertainty state;②“half coherent state”;③“half squeezing state”;3)Both the squeezing result and squeezing characteristic between |Ψ(4)o,e,Ⅱ〉q and |Ψ(4)o,e,Ⅰ〉q are the same completely,this phenomenon is ‘squeezing degenerate’.
Keywords:Half  coherence state  Half  squeezing state  Squeezing degeneration  Equal  order Nth power Y squeezing  Equal  order N  Y mini  uncertainty state  Four state superimposition multimode superimposition state light field  Half coherence squeezing stat
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