All-Optical Universal Control of Hyperfine Qudits in Trapped Neutral Atoms
- URL: http://arxiv.org/abs/2605.09715v1
- Date: Sun, 10 May 2026 19:28:06 GMT
- Title: All-Optical Universal Control of Hyperfine Qudits in Trapped Neutral Atoms
- Abstract summary: Quantum systems with more than two levels $-$ so-called qudits $-$ offer increased computational density and reduced circuit complexity.<n>We propose an all-optical scheme for universal qudit control in trapped neutral atoms in moderate to high magnetic fields.<n>Our results identify $173$Yb as a promising platform for high-fidelity, all-optical qudit-based quantum information processing.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum systems with more than two levels $-$ so-called qudits $-$ offer increased computational density and reduced circuit complexity compared to qubit-based architectures, but achieving universal and scalable control remains challenging. We propose an all-optical scheme for universal qudit control in trapped neutral atoms in moderate to high magnetic fields, focusing on the fermionic isotope $^{173}$Yb ($I=5/2$). The strong hyperfine interaction in the $^3P_1$ manifold enables fast and selective Raman transitions between nuclear-spin states in the $^1S_0$ ground-state manifold using a single linearly polarized laser. For each neighboring transition in the qudit manifold, we identify a magic polarization angle that enables coherent, state-selective control while suppressing off-resonant excitations, with operation frequencies exceeding 100~kHz. Combined with phase-shift operations, this provides universal control of the full single-qudit space. We further discuss compatible two-qudit gates based on the Rydberg blockade mechanism, completing a universal gate set, and analyze state-selective readout schemes compatible with the proposed protocol. Our results identify $^{173}$Yb as a promising platform for high-fidelity, all-optical qudit-based quantum information processing.
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