arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1709.08702quant-phcond-mat.dis-nn
收藏

随机介质中的纠缠动力学

Entanglement dynamics in random media

G. Menezes, N. F. Svaiter, C. A. D. Zarro

摘要:

研究了光锥的随机涨落对二能级原子间纠缠动力学的影响。在我们的模型中,两原子系统被设想为一个开放的系统与电磁场耦合在真空状态。我们采用量子主方程的玻恩-马尔可夫近似,以描述完全积极的时间演化的原子系统。我们限制我们的调查的情况下,原子单独耦合到两个空间分离的腔,其中一个显示出现的光锥波动。在这样的无序腔中,我们假设Klein-Gordon方程的系数是空间坐标的随机函数。无序介质由一个中心的,平稳的高斯过程。我们证明了无序具有减缓纠缠衰变的效果。我们推测在强无序环境中,纠缠态的平均寿命可以通过几乎完全抑制量子非定域退相干的方式得到提高。

英文摘要:

We study how the entanglement dynamics between two-level atoms is impacted by random fluctuations of the light cone. In our model the two-atom system is envisaged as an open system coupled with an electromagnetic field in the vacuum state. We employ the quantum master equation in the Born-Markov approximation in order to describe the completely positive time evolution of the atomic system. We restrict our investigations to the situation in which the atoms are coupled individually to two spatially separated cavities, one of which displaying the emergence of light-cone fluctuations. In such a disordered cavity, we assume that the coefficients of the Klein-Gordon equation are random functions of the spatial coordinates. The disordered medium is modeled by a centered, stationary and Gaussian process. We demonstrate that disorder has the effect of slowing down the entanglement decay. We conjecture that in a strong disorder environment the mean life of entangled states can be enhanced in such a way as to almost completely suppress quantum nonlocal decoherence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑