A scheme for adjusting the dipole squeezing properties of one atom at one place by manipulating and detecting another atom at the remote place is proposed, in which these atoms initially in the spatially separated ent...A scheme for adjusting the dipole squeezing properties of one atom at one place by manipulating and detecting another atom at the remote place is proposed, in which these atoms initially in the spatially separated entangled state act as a quantum channel carrying quantum information. The result shows that the dipole squeezing properties of one atom can be adjusted by rotating and detecting the other, and the maximal atomic squeezing can be obtained under local operation and classical communication.展开更多
The dynamics of different kinds of discrete breathers in three types of one-dimensional monatomic chainswith on-site and inter-site potentials are investigated.The existence and evolution of symmetric breather, antisy...The dynamics of different kinds of discrete breathers in three types of one-dimensional monatomic chainswith on-site and inter-site potentials are investigated.The existence and evolution of symmetric breather, antisymmetricbreather, and multibreather in one-dimensional models are proved by using rotating wave approximation, localanharmonic approximation, and the numerical method.The linear stability of these breathers is investigated by usingLyapunov stable analysis.The localization and stability of breathers in three types of models correlate closely to thesystem nonlinear parameter β.展开更多
O731 2000021386非简谐性离子晶格在光场中的能谱:动态斯塔克效应=Energy spectrum of anharmonic ionic-crystallattice in lightfield a dynamical Stark effect[刊,中]/欧发(华南理工大学应用物理系.广东,广州(510641)),何明高,吴福...O731 2000021386非简谐性离子晶格在光场中的能谱:动态斯塔克效应=Energy spectrum of anharmonic ionic-crystallattice in lightfield a dynamical Stark effect[刊,中]/欧发(华南理工大学应用物理系.广东,广州(510641)),何明高,吴福根(广东工业大学数理系.广东,广州(510090))//光学学报.-1999,19(7).-889-895以在偶极近似与旋转波近似下导出的哈密顿算符为基础,并以单模光频支声子与单模光场构成的共振耦合系统为简化模型,取得该耦合系统相互作用能谱的比较严格的解析解,同时还发现一种起源于声子-声子耦合的真空平移效应。图2参9(严寒)展开更多
Following Jaynes-Cummings model,the evolution of the field entropy in the system of a two-level atom interacting with the single mode coherent field is investigated under rotating-wave approximation.The typical case &...Following Jaynes-Cummings model,the evolution of the field entropy in the system of a two-level atom interacting with the single mode coherent field is investigated under rotating-wave approximation.The typical case "the field frequency variance with time in the form of sine ω=ω0+usin(wt) has been considered.The influences of the amplitude and angle frequency of the field frequency variance on entropy evolution of the field are discussed by numerical calculations.Calculation results indicate that the field frequency variance influences violently the behavior of field entropy evolution;the larger the amplitude of the field frequency variance is,the stronger the influence of the field frequency variance on the time evolution of field entropy is.展开更多
In this paper, the quantum entanglement between a single mode binomial field and a cascade three-level atom is calculated mechanically without the rotating wave approximation. The numerical results indicate that the q...In this paper, the quantum entanglement between a single mode binomial field and a cascade three-level atom is calculated mechanically without the rotating wave approximation. The numerical results indicate that the quantum entanglement at the first few periods is reduced notably due to the fact that the atom is initially in the superposition state. With increasing field parameter , the period of the entanglement evolution becomes obvious and the quantum decoherence phenomenon emerges in a short time.展开更多
文摘A scheme for adjusting the dipole squeezing properties of one atom at one place by manipulating and detecting another atom at the remote place is proposed, in which these atoms initially in the spatially separated entangled state act as a quantum channel carrying quantum information. The result shows that the dipole squeezing properties of one atom can be adjusted by rotating and detecting the other, and the maximal atomic squeezing can be obtained under local operation and classical communication.
基金Supported by the National Natural Science Foundation of China under Grant No.1057411 the Foundation for Researching Group by Beijing Normal University
文摘The dynamics of different kinds of discrete breathers in three types of one-dimensional monatomic chainswith on-site and inter-site potentials are investigated.The existence and evolution of symmetric breather, antisymmetricbreather, and multibreather in one-dimensional models are proved by using rotating wave approximation, localanharmonic approximation, and the numerical method.The linear stability of these breathers is investigated by usingLyapunov stable analysis.The localization and stability of breathers in three types of models correlate closely to thesystem nonlinear parameter β.
文摘O731 2000021386非简谐性离子晶格在光场中的能谱:动态斯塔克效应=Energy spectrum of anharmonic ionic-crystallattice in lightfield a dynamical Stark effect[刊,中]/欧发(华南理工大学应用物理系.广东,广州(510641)),何明高,吴福根(广东工业大学数理系.广东,广州(510090))//光学学报.-1999,19(7).-889-895以在偶极近似与旋转波近似下导出的哈密顿算符为基础,并以单模光频支声子与单模光场构成的共振耦合系统为简化模型,取得该耦合系统相互作用能谱的比较严格的解析解,同时还发现一种起源于声子-声子耦合的真空平移效应。图2参9(严寒)
基金Natural Science Foundation of Fujian Province under Grant(No.2008J0217)
文摘Following Jaynes-Cummings model,the evolution of the field entropy in the system of a two-level atom interacting with the single mode coherent field is investigated under rotating-wave approximation.The typical case "the field frequency variance with time in the form of sine ω=ω0+usin(wt) has been considered.The influences of the amplitude and angle frequency of the field frequency variance on entropy evolution of the field are discussed by numerical calculations.Calculation results indicate that the field frequency variance influences violently the behavior of field entropy evolution;the larger the amplitude of the field frequency variance is,the stronger the influence of the field frequency variance on the time evolution of field entropy is.
基金supported by the National Natural Science Foundation of China (Grant No. 1097602/A06)
文摘In this paper, the quantum entanglement between a single mode binomial field and a cascade three-level atom is calculated mechanically without the rotating wave approximation. The numerical results indicate that the quantum entanglement at the first few periods is reduced notably due to the fact that the atom is initially in the superposition state. With increasing field parameter , the period of the entanglement evolution becomes obvious and the quantum decoherence phenomenon emerges in a short time.
