搜索结果: 91-105 共查到“知识库 量子光学”相关记录233条 . 查询时间(0.343 秒)
原子-腔-光纤复合系统中的纠缠特性
量子光学 原子-腔-光纤复合系统 选择原子测量 量子纠缠
2011/12/20
采用Negativity熵来描述两子系统间的纠缠,研究了由两个二能级原子与光纤联接的单模腔构成的系统的纠缠特性.利用数值计算方法讨论了原子与腔场的耦合强度和原子选择性测量对纠缠特性的影响.研究结果表明:对一个原子的选择性测量,可增强原子间与腔场间和腔场与腔场间的纠缠.
纠缠相干态的纠缠浓缩
纠缠相干态 纠缠浓缩 光束分离器 光子探测
2011/12/19
利用线性光学元器件对光场量子态进行操纵,可以实现远程的量子纠缠调控和量子通讯.通过分析光学分束器对相干态光场的作用,发现当初始光场态是两个两部分纠缠态的直乘时,让其中的两模通过光学分束器作用后再对其进行光子计数,另外两模将会塌缩到新的纠缠态.基于这个特点,提出了一个实现部分纠缠相干态纠缠浓缩的方案.在这个方案中,两个部分纠缠相干态被用来作为量子信道,通过光学分束器作用后对光场进行光子数探测时,如果...
回音壁腔光机械系统中的动力学行为
回音壁光机械腔 光机械诱导透明 光机械诱导吸收 量子信息
2012/11/26
研究了在控制和探测激光存在时回音壁腔光机械系统中的动力学行为，分析了系统中产生类似于原子电磁诱导透明与吸收的原因，论证了此系统的输出场在探测频率下存在类似于电磁诱导透明和电磁诱导吸收的现象，并证实了回音壁光机械腔系统与Λ原子系统中的泵浦探测响应特性相类似.此外，利用泵浦失谐控制光机械系统中类似于电磁诱导透明和电磁诱导吸收之间的转换，此系统中光机械诱导透明与吸收的论证为量子信息的处理提供了理论依据.
水相合成了谷胱甘肽修饰的CdTe/ZnS 量子点(GSH-CdTe/ZnS QDs). 从原子力显微镜照片可以看出, 合成的核壳型GSH-CdTe/ZnS QDs 具有良好的分散性. 当吡柔比星与GSH-CdTe/ZnS QDs 相互作用时, 吡柔比星吸附在GSH-CdTe/ZnS QDs 的表面, 通过光诱导电子转移的方式猝灭GSH-CdTe/ZnS QDs 的荧光. 然后向GSH-CdTe/Z...
Effects of Fermi-surface shrinking on the optical sum rule in pnictides
Effects of Fermi-surface optical sum rule in pnictides
2010/11/25
In this paper we investigate the effects of the band shifts induced by the interband spin-fluctuation coupling on the optical sum rule in pnictides. We show that, despite the shrinking of the Fermi su...
Currently proposed architectures for long-distance quantum communication rely on networks of quantum processors connected by optical communications channels [1,2]. The key resource for such networks ...
Supersymmetry and PT-Symmetric Spectral Bifurcation
Supersymmetry Spectral Bifurcation Quantum Physics
2010/11/8
Dynamical systems exhibiting both PT and Supersymmetry are analyzed in a general scenario. It is found that, in an appropriate parameter domain, the ground state may or may not respect PT-symmetry. In...
Optically induced spin polarisation of the NV- centre in diamond: role of electron-vibration interaction
Optically induced spin polarisation NV- centre in diamond: role electron-vibration interaction
2010/11/22
The novel aspect of the centre (NV−) in diamond is the high degree of spin polarisation achieved through optical illumination. In this paper it is shown that the spin polarisation occurs as a co...
Chiral Dynamics and Dubna-Mainz-Taipei Dynamical Model for Pion-Photoproduction Reaction
Chiral symmetry threshold 0 production baryon deformation
2011/1/5
We demonstrate that the Dubna-Mainz-Taipei (DMT) meson-exchange dynamica model, which starts from an effective chiral Lagrangian, for pion photoproduction pro-vides an excellent and economic framework...
Repulsively-bound exciton-biexciton states in high-spin fermions in optical lattices
Repulsively-bound exciton-biexciton states optical lattices
2010/11/17
We show that the interplay between spin-changing collisions and quadratic Zeeman coupling
provides a novel mechanism for the formation of repulsively bound composites in high-spin fermions,which we i...
An accelerated particle sees the Minkowski vacuum as thermally excited, and the particle
moves stochastically due to an interaction with the thermal bath. This interaction fluctuates
the particle’s ...
Elastic electron-deuteron scattering and two-body current operators in the Light-Front Hamiltonian Dynamics
Elastic electron-deuteron scattering two-body current operators Light-Front Hamiltonian Dynamics
2011/1/6
The electromagnetic properties of the deuteron are investigated within a Light-Front Hamilto-
nian Dynamics framework, with a current operator that contains both one-body and two-body
contributions....
Despite weak spin-orbit coupling and an indirect band gap, significant optical spin orientation
is possible in silicon. We show this by performing full band-structure calculations of the phonon-assis...
Classical and Quantum Interpretations Regarding Thermal Behavior in a Coordinate Frame Accelerating Through Zero-Point Radiation
Classical Quantum Thermal Behavior Coordinate Frame Zero-Point Radiation
2010/11/16
A relativistic classical field theory with zero-point radiation involves a vacuum corresponding to a scale-invariant spectrum of random classical radiation in spacetime with the overall constant chos...
Single and Double Photonuclear Excitations in Pb+Pb Collisions at the LHC
Single Double Photonuclear Excitations Pb+Pb Collisions
2011/1/10
Cross sections are calculated for single and double photon exchange in ultra-peripheral Pb+Pb
collisions at the LHC. The particle production is simulated with the DPMJET event generator.
Large cross...