原子阵列中双波段布洛赫振荡产生的极端单激发子辐照度

IF 6.6 1区 物理与天体物理 Q1 OPTICS
Luojia Wang, Da-Wei Wang, Luqi Yuan, Yaping Yang, and Xianfeng Chen
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引用次数: 0

摘要

原子阵列提供了一个重要的量子光学平台,通过光子介导的偶极-偶极相互作用,可以实现量子信息处理的关键应用。此类应用的一个主要障碍是激发态的快速衰减。通过在外加磁场下控制原子阵列中单次激发的双波段布洛赫振荡,我们在这里展示了在有限尺寸的原子阵列中,奇异的亚辐照度可以实现并保持,而且比自发衰减时间长几个数量级。我们的主要发现是找到了防止激发态波包散射到自由空间光锥内部耗散区的方法,从而使激发态在亚辐射状态下保持极长的衰减时间。我们的研究表明,在原子阵列中引入来自外部磁场的空间线性电势,然后沿相反方向操纵相互连接的双波段布洛赫振荡,就能实现这种操作。我们的研究结果还指出了在超辐射态和亚辐射态之间进行可控切换的可能性,这将为量子存储带来潜在的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extreme single-excitation subradiance from two-band Bloch oscillations in atomic arrays
Atomic arrays provide an important quantum optical platform with photon-mediated dipole–dipole interactions that can be engineered to realize key applications in quantum information processing. A major obstacle for such applications is the fast decay of the excited states. By controlling two-band Bloch oscillations of single excitation in an atomic array under an external magnetic field, here we show that exotic subradiance can be realized and maintained with orders of magnitude longer than the spontaneous decay time in atomic arrays with the finite size. The key finding is to show a way for preventing the wavepacket of excited states scattering into the dissipative zone inside the free space light cone, which therefore leads to the excitation staying at a subradiant state for an extremely long decay time. We show that such operation can be achieved by introducing a spatially linear potential from the external magnetic field in the atomic arrays and then manipulating interconnected two-band Bloch oscillations along opposite directions. Our results also point out the possibility of controllable switching between superradiant and subradiant states, which leads to potential applications in quantum storage.
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来源期刊
CiteScore
13.60
自引率
5.30%
发文量
1325
期刊介绍: Photonics Research is a joint publishing effort of the OSA and Chinese Laser Press.It publishes fundamental and applied research progress in optics and photonics. Topics include, but are not limited to, lasers, LEDs and other light sources; fiber optics and optical communications; imaging, detectors and sensors; novel materials and engineered structures; optical data storage and displays; plasmonics; quantum optics; diffractive optics and guided optics; medical optics and biophotonics; ultraviolet and x-rays; terahertz technology.
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