排序方式: 共有158条查询结果,搜索用时 695 毫秒
41.
非线性J-C模型中场的熵压缩 总被引:2,自引:0,他引:2
运用量子信息熵理论研究了非线性Jaynes—Cummings模型中场的熵压缩特性,讨论了克尔介质与原子初态对场熵压缩的影响。结果表明强克尔介质相互作用可以产生深度压缩光,原子相干性也影响场熵压缩效应的存在和压缩深度。 相似文献
42.
We explore the entropy uncertainty for qutrit system under non-Markov noisy environment and discuss the effects of the quantum memory system and the spontaneously generated interference(SGI)on the entropy uncertainty in detail.The results show that,the entropy uncertainty can be reduced by using the methods of quantum memory system and adjusting of SGI.Particularly,the entropy uncertainty can be decreased obviously when both the quantum memory system and the SGI are simultaneously applied. 相似文献
43.
We describe a protocol for telecloning a quantum state to M distant users via an ( M + 1)-particle W state, In the scheme, two atoms interact simultaneously with a highly detuned cavity mode with the assistance of a classical field. The scheme is insensitive to the cavity decay and the thermal field. Moreover, the Bell-state measurement can be achieved by detecting two atoms separately. Thus telecloning can be realized in a simple way. 相似文献
44.
Fast scheme for generating quantum-interference states and GHZ state of N trapped ions 总被引:1,自引:0,他引:1 下载免费PDF全文
We propose a fast scheme to generate the quantum-interference states
of N trapped ions. In the scheme the ions are driven by a
standing-wave laser beam whose carrier frequency is tuned such that
the ion transition can take place. We also propose a simple and fast
scheme to produce the GHZ state of N hot trapped ions and this
scheme is insensitive to the heating of vibrational motion, which is
important from the viewpoint of decoherence. 相似文献
45.
熵测不准关系与光场的熵压缩 总被引:27,自引:3,他引:24
用熵作为光场量子涨落的量度,根据熵测不准关系,建立了熵压缩的概念,具体研究了光场与原子相互作用时的熵压缩,结果显示,熵压缩实现了对光场压缩效应的高灵敏量度。 相似文献
46.
47.
Entanglement-enhanced classical communication through generalized amplitude damping channel 下载免费PDF全文
The problem of sending a single classical bit through a generalized
amplitude damping channel is considered. When two transmissions
through the channel are available as a resource, we find that two
entangled transmissions can enhance the capability of receiver's
judging information correctly under certain conditions compared with
two product-state transmissions. In addition, we find a special case
in which the two entangled transmissions can always make a
classical bit more effectively disable the noise influence. 相似文献
48.
Quantum entanglement in the system of a moving V-type three-level atom interacting with the SU(1,1)-related coherent fields 下载免费PDF全文
In a system with a moving V-type three-level atom interacting with
the SU(1,1)-related coherent fields,
we investigate the entanglement between the moving three-level atom
and the SU(1,1)-related coherent fields by
using the quantum-reduced entropy, and that
between the SU(1,1)-related
coherent fields by using the quantum relative
entropy of entanglement. It is shown that the two kinds of entanglement
are dependent on the atomic motion and
exhibit the periodic evolution with a
period of 2π/p. The maximal atom--field qutrit entanglement
state can be prepared, and the entanglement preservation
of the SU(1,1)-related coherent fields
can be realized in the interacting process
via the appropriate selection of system
parameters and interaction time. 相似文献
49.
Entanglement and photon statistics of output fields from beam splitter for binomial state inputs 总被引:1,自引:0,他引:1 下载免费PDF全文
The entanglement properties are investigated based on linear entropy, and nonclassicalities are examined of output fields from a beam splitter for pure binomial state inputs. It is shown that the properties of the entanglement and the photon statistics of output fields are not only strongly dependent on the parameters of input binomial states but also quite involved with the nature of the beam splitter. The best entanglement can be obtained when the parameters of both input states and the beam splitter are chosen appropriately. Finally, we analyse briefly the distinguishability between the joint input state and the joint output state. 相似文献
50.
Linear entropy dynamics of the field in the Jaynes-Cummings model with an intensity-dependent coupling in the dispersive approximation 下载免费PDF全文
We present the linear entropy dynamics of the field state in the dispersive cavity in the Jaynes-Cummings model with an intensity-dependent coupling in the dispersive approximation, and investigate the influence of dissipation on entanglement between the field and the atoms. We show that the coherence properties of the field are also affected by the cavity when the nonlinear process of the field interacting with the atoms with an intensity-dependent coupling is involved, and find that the dissipation constant, the intensity of the field and the atomic distribution angle have different influence on the coherence properties of the field. 相似文献