Related papers: Spontaneous Raman scattering out of a metastable atomic qubit

Spontaneous Raman scattering out of a metastable atomic qubit

URL: http://arxiv.org/abs/2505.04854v1
Date: Wed, 07 May 2025 23:32:33 GMT
Title: Spontaneous Raman scattering out of a metastable atomic qubit
Authors: I. D. Moore, A. Quinn, J. O'Reilly, J. Metzner, S. Brudney, G. J. Gregory, D. J. Wineland, D. T. C. Allcock,
Abstract summary: We measure spontaneous Raman scattering rates out of a metastable $D_5/2$ qubit manifold of a single trapped $40$Ca$+$ ion illuminated by 976 nm light.<n>This supports the calculation of error rates from both types of scattering during one- and two-qubit gates.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Metastable qubits in atomic systems can enable large-scale quantum computing by simplifying hardware requirements and adding efficient erasure conversion to the pre-existing toolbox of high-fidelity laser-based control. For trapped atomic ions, the fundamental error floor of this control is given by spontaneous Raman and Rayleigh scattering from short-lived excited states. We measure spontaneous Raman scattering rates out of a metastable $D_{5/2}$ qubit manifold of a single trapped $^{40}$Ca$^+$ ion illuminated by 976 nm light that is -44 THz detuned from the dipole-allowed transition to the $P_{3/2}$ manifold. This supports the calculation of error rates from both types of scattering during one- and two-qubit gates on this platform, thus demonstrating that infidelities $<10^{-4}$ are possible.

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