Zidan N, Abdel-Hameed H F, Metwally N
Mathematics Department, Faculty of Science, Sohag University, Sohag, Egypt.
Mathematics Department, College of Science, Jouf University, Sakaka, Saudi Arabia.
Sci Rep. 2019 Feb 25;9(1):2699. doi: 10.1038/s41598-019-39183-5.
The quantum Fisher information of an atomic system interacting with a single cavity mode in the presence of Kerr medium is discussed. It is shown that quantum Fisher information for an initial separable atomic system is larger than that depicted for the initial entangled atomic system. For initial vacuum state of the cavity mode, the quantum Fisher information with respect to the Kerr medium and the phase decoherence parameter is larger than that displayed for the detuning parameter. Both phase decoherence and Kerr medium have the same effect on the decay of quantum Fisher information, while they have an opposite effect on its maximum values.
讨论了在克尔介质存在下与单腔模相互作用的原子系统的量子费舍尔信息。结果表明，初始可分离原子系统的量子费舍尔信息大于初始纠缠原子系统的量子费舍尔信息。对于腔模的初始真空态，关于克尔介质和相位退相干参数的量子费舍尔信息大于失谐参数的量子费舍尔信息。相位退相干和克尔介质对量子费舍尔信息的衰减具有相同的影响，而它们对其最大值具有相反的影响。
