Extended Rydberg Lifetimes in a Cryogenic Atom Array

• URL: http://arxiv.org/abs/2602.05959v1
• Date: Thu, 05 Feb 2026 18:13:34 GMT
• Title: Extended Rydberg Lifetimes in a Cryogenic Atom Array
• Authors: Junlan Jin, Yue Shi, Youssef Aziz Alaoui, Jingxin Deng, Yukai Lu, Jeff D. Thompson, Waseem S. Bakr,
• Abstract summary: We report on the realization of a $133$Cs optical tweezer array in a cryogenic blackbody radiation environment.<n>By enclosing the array within a 4K radiation shield, we measure long Rydberg lifetimes, up to $406 (36),$s for the $55 P_3/2$ Rydberg state.
• Score: 2.5231063512856347
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report on the realization of a $^{133}$Cs optical tweezer array in a cryogenic blackbody radiation (BBR) environment. By enclosing the array within a 4K radiation shield, we measure long Rydberg lifetimes, up to $406 (36)\,μ$s for the $55 P_{3/2}$ Rydberg state, a factor of 3.3(3) longer than the room-temperature value. We employ single-photon coupling for coherent manipulation of the ground-Rydberg qubit. We measure a small differential dynamic polarizability of the transition, beneficial for reducing dephasing due to light intensity fluctuations. Our results pave the path for advancing neutral-atom two-qubit gate fidelities as their error budgets become increasingly dominated by $T_1$ relaxation of the ground-Rydberg qubit.

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