Influence of thermal effects on atomic Bloch oscillation

doi:10.1007/s11467-024-1420-9

Frontiers of Physics

2024, Vol. 19

Issue (6): 62201 https://doi.org/10.1007/s11467-024-1420-9

本期目录

Influence of thermal effects on atomic Bloch oscillation

Guoling Yin¹, Chi-Kin Lai², Nana Chang^2,³, Yi Liang², Dekai Mao², Xiaoji Zhou^1,^2,³(

)

¹. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China
². State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, Peking University, Beijing 100871, China
³. Institute of Carbon-based Thin Film Electronics, Peking University, Taiyuan 030012, China

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Abstract：

Advancements in the experimental toolbox of cold atoms have enabled the meticulous control of atomic Bloch oscillation (BO) within optical lattices, thereby enhancing the capabilities of gravity interferometers. This work delves into the impact of thermal effects on Bloch oscillation in 1D accelerated optical lattices aligned with gravity by varying the system’s initial temperature. Through the application of Raman cooling, we effectively reduce the longitudinal thermal effect, stabilizing the longitudinal coherence length over the timescale of its lifetime. The atomic losses over multiple Bloch periods are measured, which are primarily attributed to transverse excitation. Furthermore, we identify two distinct inverse scaling behaviors in the oscillation lifetime scaled by the corresponding density with respect to temperatures, implying diverse equilibrium processes within or outside the Bose−Einstein condensate (BEC) regime. The competition between the system’s coherence and atomic density leads to a relatively smooth variation in the actual lifetime versus temperature. Our findings provide valuable insights into the interaction between thermal effects and BO, offering avenues for the refinement of quantum measurement technologies.

Key words： Bloch oscillation optical lattice thermal effects cold atoms Raman cooling

收稿日期: 2024-02-23 出版日期: 2024-05-24

Corresponding Author(s): Xiaoji Zhou

引用本文:

. [J]. Frontiers of Physics, 2024, 19(6): 62201.
Guoling Yin, Chi-Kin Lai, Nana Chang, Yi Liang, Dekai Mao, Xiaoji Zhou. Influence of thermal effects on atomic Bloch oscillation. Front. Phys. , 2024, 19(6): 62201.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-024-1420-9
https://academic.hep.com.cn/fop/CN/Y2024/V19/I6/62201

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