Enhancing the coherence time of a neutral atom by an optical quartic trap

• URL: http://arxiv.org/abs/2502.20794v1
• Date: Fri, 28 Feb 2025 07:20:28 GMT
• Title: Enhancing the coherence time of a neutral atom by an optical quartic trap
• Authors: Haobo Chang, Zhuangzhuang Tian, Xin Lv, Mengna Yang, Zhihui Wang, Qi Guo, Pengfei Yang, Pengfei Zhang, Gang Li, Tiancai Zhang,
• Abstract summary: Coherence time of an optically trapped neutral atom is a crucial parameter for quantum technologies.<n>We formulated the decoherence rate caused by the variance of the differential energy shift and photon jumping rate.<n>We experimentally investigated the coherence time of a trapped single cesium atom.
• Score: 23.831187386634372
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The coherence time of an optically trapped neutral atom is a crucial parameter for quantum technologies. We found that optical dipole traps with higher-order spatial forms inherently offer lower decoherence rates compared to those with lower-order spatial forms. We formulated the decoherence rate caused by the variance of the differential energy shift and photon jumping rate. Then, we constructed blue-detuned harmonic and quartic optical dipole traps, and experimentally investigated the coherence time of a trapped single cesium atom. The experimental results qualitatively verified our theory. Our approach provides a novel method to enhance the coherence time of optically trapped neutral atoms.

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