English

Bichromatic Tweezers for Qudit Quantum Computing in ${}^{87}$Sr

Atomic Physics 2026-05-08 v2 Quantum Physics

Abstract

Neutral atoms have become a competitive platform for quantum metrology, simulation, sensing, and computing. Current magic trapping techniques are insufficient to engineer magic trapping conditions for qudits encoded in hyperfine states with J0J \neq 0, compromising qudit coherence. In this paper we propose a scheme to engineer magic trapping conditions for qudits via bichromatic tweezers. We show it is possible to suppress differential light shifts across all magnetic sublevels of the 5s5p5s5p 3P2\mathrm{^{3}P_2} state by using two carefully chosen wavelengths (with comparable tensor light shift magnitude and opposite sign) at an appropriate intensity ratio, thus suppressing light-shift induced dephasing, enabling scalar magic conditions between the ground state and 5s5p5s5p 3P2\mathrm{^{3}P_2}, and tensor magic conditions for qudits encoded within it. Furthermore, this technique enables robust operation at the tensor magic angle 54.7^\circ with linear trap polarization via reduced sensitivity to uncertainty in experimental parameters. We expect this technique to enable new loading protocols, enhance cooling efficiency, and enhance nuclear spins' coherence times, thus facilitating qudit-based quantum computing in 87{}^{87}Sr in the 5s5p5s5p 3P2\mathrm{^{3}P_2} manifold.

Keywords

Cite

@article{arxiv.2601.16328,
  title  = {Bichromatic Tweezers for Qudit Quantum Computing in ${}^{87}$Sr},
  author = {Enrique A. Segura Carrillo and Eric J. Meier and Michael J. Martin},
  journal= {arXiv preprint arXiv:2601.16328},
  year   = {2026}
}

Comments

Revised fidelity analysis to account for quadratic Zeeman shift, modifications on section II.C, Appendix C, and in Figs 4,5 and C.1; added new Appendix D.2

R2 v1 2026-07-01T09:16:34.613Z