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Kerr介质中压缩真空场与耦合双原子依赖强度耦合系统原子布居数的时间演化 总被引:19,自引:14,他引:5
研究了存在Kerr介质时,单模压缩真空场与耦合双原子依赖强度耦合相互作用系统原子布居数的时间演化规律,讨论了Kerr介质、原子间相互作用和光场的初始压缩因子对原子布居数时间演化的影响. 相似文献
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研究了存在Kerr介质时,耦合双原子与单模压缩真空场双光子跃迁相互作用系统光场的量子特性,讨论了Kerr介质和原子间偶极-偶极相互作用对光场量子特性的影响. 结果表明:当Kerr效应和偶极-偶极相互作用可以忽略时,光场U2分量的涨落能被周期性地压缩,随着Kerr效应和偶极-偶极相互作用的增强,光场的压缩逐渐变浅,压缩次数减少;Kerr效应和偶极-偶极相互作用的影响使光场的二阶相干度时间演化曲线呈现周期性的崩塌-回复现象,但不论耦合强度如何,光子总是呈现聚束效应.
关键词:
Kerr介质
压缩真空场
耦合双原子
光场的量子特性 相似文献
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研究了存在Kerr介质时,双模压缩真空场与耦合二能级原子相互作用系统中光子的统计性质,讨论了Kerr介质与光场的耦合强度、光场的初始压缩因子和原子的初态对光子统计性质的影响.数值计算结果表明,光子周期性地交替呈现聚束和反聚束效应,光场两模之间总是呈现正相关,并且这种相关为非经典相关;Kerr介质的影响使光场的二阶相干度演化曲线呈现周期性的崩塌-回复现象,随着Kerr效应的加强,崩塌-回复周期变短,以至消失.
关键词:
Kerr介质
耦合双原子
双模压缩真空场
光子统计性质 相似文献
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采用数值计算的方法,研究了有Kerr介质存在时负二项式光场与二能级原子依赖强度耦合相互作用系统中原子布居反转的时间演化规律,讨论了Kerr介质和光场参量对原子反转的时间演化的影响. 相似文献
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The conjecture that geodesics in the Kerr matric witha > m cannot violate causality in the sense of meeting a turning point before making up for lost time, is found to be untrue for null geodesics. 相似文献
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P C Vaidya 《Pramana》1984,22(3-4):151-158
In addition to the Kerr metric with cosmological constant Λ several other metrics are presented giving a Kerr-like solution
of Einstein’s equations in the background of deSitter universe. A new metric of what may be termed as rotating deSitter space-time—a
space-time devoid of matter but containing null fluid with twisting null rays, has been presented. This metric reduces to
the standard deSitter metric when the twist in the rays vanishes. Kerr metric in this background is the immediate generalization
of Schwarzschild’s exterior metric with cosmological constant. 相似文献
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O. Semerák 《General Relativity and Gravitation》1993,25(10):1041-1077
Stationary frames in the Kerr geometry are rewieved and their properties compared. In particular, the locally non-rotating frame, the Carter frame, the static frame and the frame connected with the equatorial circular geodesic are treated as the most important examples. 相似文献
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The motion of test particles in polar orbit about the source of the Kerr field of gravity is studied, using Carter's first integrals for timelike geodesies in the Kerr space-time. Expressions giving the angular coordinates of such particles as functions of the radial one are derived, both for the case of a rotating black hole as well as for that of a naked singularity. 相似文献
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An exact solution of Einstein's equations describing the gravitational wave associated to a ring of massless particles is presented. It has been obtained by boosting the Kerr metric along the axis of symmetry, and considering the limit in which the speed of the boost tends to the velocity of light. 相似文献
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G. Dautcourt 《General Relativity and Gravitation》2009,41(6):1437-1454
Roy P. Kerr has discovered his celebrated metric 45 years ago, yet the problem to find a generalization of the Schwarzschild metric for a rotating mass was faced much earlier. Lense and Thirring, Bach, Andress, Akeley, Lewis, van Stockum and others have tried to solve it or to find an approximative solution at least. In particular Achilles Papapetrou, from 1952 to 1961 in Berlin, was interested in an exact solution. He directed the author in the late autumn of 1959 to work on the problem. Why did these pre-Kerr attempts fail? Comments based on personal reminiscences and old notes. 相似文献
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Imaginary Weyl coordinates in the Kerr space-time 总被引:1,自引:0,他引:1
Wang Yongcheng 《General Relativity and Gravitation》1984,16(6):551-561
By introducing imaginary Weyl coordinates the Kerr geometry can be described by the Weyl coordinate system as good as the Boyer-Lindquist system. 相似文献
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Parametrization of the Kerr Solution 总被引:1,自引:0,他引:1
From the Kerr solution of Ernst equation under Ehlers and unitary transformations, we build a parametrized Kerr solution depending on three parameters, namely the mass, the angular momentum of the source and an adimensional parameter m
1. Varying m
1 produces a topological deformation of the ergosphere. 相似文献
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Walter Simon 《General Relativity and Gravitation》1984,16(5):465-476
For stationary, asymptotically flat solutions of Einstein's equations, covariant functionals of the metric variables are defined which characterize the Kerr metric uniquely. For instance, we obtain a generalization of the Bach tensor to stationary metrics, which vanishes if and only if the solution is Kerr. We also give a new interpretation of the Schwarzschild-to-Kerr-transformation. Our results might be applicable to simplify the proof of the uniqueness theorem for stationary black holes. 相似文献