Extreme subradiance from two-band Bloch oscillations in atomic arrays

• URL: http://arxiv.org/abs/2303.15071v1
• Date: Mon, 27 Mar 2023 10:23:41 GMT
• Title: Extreme subradiance from two-band Bloch oscillations in atomic arrays
• Authors: Luojia Wang, Da-Wei Wang, Luqi Yuan, Yaping Yang, and Xianfeng Chen
• Abstract summary: We show that exotic subradiance can be realized and maintained at a time scale upto 12 orders of magnitude larger than the spontaneous decay time in atomic arrays with the finite size. Our results also point out the possibility of controllable switching between superradiant and subradiant states, which leads to potential applications in quantum storage.
• Score: 7.535603310837171
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Atomic arrays provide an important quantum optical platform with photon-mediated dipoledipole interactions, which can be engineered to realize key applications in quantum information processing. A major obstacle for such application is the fast decay of the excited states. By controlling two-band Bloch oscillations in an atomic array under external magnetic field, here we show that exotic subradiance can be realized and maintained at a time scale upto 12 orders of magnitude larger 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 extremely long decay time. We show that such operation can be achieved by introducing a spatially linear potential from external magnetic field in 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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