Sub-ms, nondestructive, time-resolved quantum-state readout of a single, trapped neutral atom

• URL: http://arxiv.org/abs/2007.09422v2
• Date: Sun, 11 Oct 2020 20:55:10 GMT
• Title: Sub-ms, nondestructive, time-resolved quantum-state readout of a single, trapped neutral atom
• Authors: Margaret E. Shea, Paul M. Baker, James A. Joseph, Jungsang Kim, Daniel J. Gauthier
• Abstract summary: We achieve fast, nondestructive quantum-state readout via fluorescence detection of a single $87$Rb atom. The atom is driven by linearly-polarized readout laser beams, making the scheme insensitive to the distribution of atomic population. Our results are likely to find application in neutral-atom quantum computing and simulation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We achieve fast, nondestructive quantum-state readout via fluorescence detection of a single $^{87}$Rb atom in the 5$S_{1/2}$ ($F=2$) ground state held in an optical dipole trap. The atom is driven by linearly-polarized readout laser beams, making the scheme insensitive to the distribution of atomic population in the magnetic sub-levels. We demonstrate a readout fidelity of $97.6\pm0.2\%$ in a readout time of $160\pm20$ $\mu$s with the atom retained in $>97\%$ of the trials, representing an advancement over other magnetic-state-insensitive techniques. We demonstrate that the $F=2$ state is partially protected from optical pumping by the distribution of the dipole matrix elements for the various transitions and the AC-Stark shifts from the optical trap. Our results are likely to find application in neutral-atom quantum computing and simulation.

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