共查询到20条相似文献,搜索用时 93 毫秒
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利用腔场与可移动镜子的作用制备两种非经典态 总被引:1,自引:1,他引:0
描述了在腔场与可移动镜子相互作用系统中,适当选择作用时间,可以制备单模腔场与镜子的纠缠态,或腔场的薛定谔猫态;通过调节腔场的长度、圆频率,以及镜子的质量、振动频率等宏观物理量,可以获得不同的量子态. 相似文献
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我们提出了一个制备多腔场薛定谔猫态的新方案.在这个方案里,我们需要一个两能级原子和几个铜的单模腔.其中,原子跃迁频率与各腔场频率是大失谐的.将原子同时注入几个腔中,原子与各腔同时发生相互作用.系统按大失谐情况下J-C模型演化.着重讨论了三腔场薛定谔猫态的制备,我们的方案可以很容易被推广到多腔场薛定谔猫态的制备. 相似文献
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量子力学教学中,薛定谔方程是描述一个量子系统变化的核心部分.学生对薛定谔方程的学习,可以理解量子物理和经典物理的不同之处,在量子物理教学中,薛定谔方程的讲解是一个非常重要的内容.然而在教学中学生对于薛定谔方程的理解,通常局限在定态薛定谔方程,而对于量子态随着时间的变化部分并不清楚,因此我们引入耦合腔模型:一个单光子在一个耦合的腔系统中,求光子在不同腔中出现概率随着时间变化关系.在教学中利用最简单的哈密顿量描述光子在耦合腔中的跳跃过程,给出几率随着时间变化的解析表达式,从而更加直观的理解微观粒子在一个量子系统中的规律. 相似文献
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利用全量子理论及量子信息保真度理论,研究了薛定谔猫态光场与玻色爱因斯坦凝聚原子相互作用系统中,量子态保真度随时间的演化特性.讨论了光场强度和玻色爱因斯坦凝聚原子间的耦合强度对量子态保真度的影响.结果表明:光场强度可调制量子态的保真效果,而原子间的耦合常数主要影响量子态保真度的振荡频率. 相似文献
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利用全量子理论及量子信息保真度理论,研究了薛定谔猫态光场与玻色爱因斯坦凝聚原子相互作用系统中,量子态保真度随时间的演化特性.讨论了光场强度和玻色爱因斯坦凝聚原子间的耦合强度对量子态保真度的影响.结果表明:光场强度可调制量子态的保真效果,而原子间的耦合常数主要影响量子态保真度的振荡频率. 相似文献
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A. N. Elsukov 《Russian Physics Journal》1965,8(4):39-42
A rigorous solution is given for modes of TMnmo type. The complex resonant frequency n is expressed via a transcendental characteristic equation. Some particular cases are discussed.Read at the Third All-Union Conference on Ferrites, Leningrad, 23 October 1963. 相似文献
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Yu. D. Chernichenko 《Physics of Atomic Nuclei》2004,67(2):414-423
Within the relativistic quasipotential approach to quantum field theory, a method is developed for solving a finite-difference quasipotential equation for the case where a total quasipotential describing the interaction of two relativistic spinless particles of unequal masses is a superposition of a nonlocal separable and a local quasipotential. The cases are investigated where the local component of the total interaction—it is assumed to be known—either admits or does not admit the existence of bound states. This makes it possible to obtain an exact expression for the increment of the phase shift, to determine the conditions of the existence of bound states, and to give a generalization of the Levinson theorem. 相似文献
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T. Ouisse 《The European Physical Journal B - Condensed Matter and Complex Systems》2001,22(4):415-420
The tunnelling lifetime of an electron lying in a p-type orbital localised at a given distance from a semiconductor or a metal is calculated by using Bardeen's method. It is
then shown that even in the absence of broad bands, the hole injection process from semiconductors and metals into polymers
should follow a Fowler-Nordheim dependence, provided that the current is not bulk-limited. In the semiconductor case, the
current can be expressed by a fully analytical formula, and by an approximate one in the case of a metal. It is demonstrated
that the effective Fowler-Nordheim barrier is not the mere difference between the metal work function or the semiconductor
electron affinity and the HOMO level of the polymer, but a simple function of both levels.
Received 6 April 2001 and Received in final form 29 May 2001 相似文献
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Molecular-dynamics was used to investigate the structural changes occurring in a three-dimensional solid when the solid is
transferred from an amorphous into a crystalline state. Crystal cells of a new type — pentadecahedrons with five square lateral
faces and ten regular triangular faces at the vertices of a cell — were found for the first time in a computer experiment.
It is shown that a bistructure consisting of crystal cells of different types, including cells with five-fold symmetry axes,
are stable in the solid.
Fiz. Tverd. Tela (St. Petersburg) 40, 1919–1924 (October 1998) 相似文献
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V. I. Bukreev 《Doklady Physics》2002,47(12):880-882
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The existence of surface polaritons in a dielectric at a boundary with an ideal metal or superconductor in a static electric
field is predicted. The frequency regions in which polaritons exist are substantially different for opposite orientations
of the electric field, so that a change in the direction of the field signifies “switching on” or “switching off” of surface
polaritons with a fixed frequency.
Pis'ma Zh. éksp. Teor. Fiz. 68, No. 12, 876–880 (25 December 1998) 相似文献
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V. P. Glashchenko 《Technical Physics》2014,59(5):754-761
The conditions under which the nonuniform compensating field of the reflector of the mass-reflectron can be generated with an acceptable accuracy at the symmetry axis of the reflector and extrapolated to the radial neighborhood of the axial line are determined. The plots that illustrate the distribution of the calculated nonuniform field of the reflector, the possibilities for implementation, and errors of focusing with respect to time of flight in the radial neighborhood are presented. Analytical expressions for the calculation of the time of flight of ions in the reflector in which the field distribution is described using a power series and analytical expressions for the calculation of the field distribution in the reflector in which the time of flight is determined using a power series are derived. A method for the analytical calculation of the compensating nonuniform field of the reflector based on the given dependence of the time of flight in the absence of such a field is proposed using a solution to the Abel integral equation. The solution to this equation yields analytical expressions for the calculation of the compensating field of the reflector in mass-reflectrons that contain the zero-field drift space and regions of acceleration (deceleration) of ions with a uniform field. 相似文献