Implementing a neutral-atom controlled-phase gate with a single Rydberg pulse

Abstract

One can implement fast two-qubit entangling gates by exploiting the Rydberg blockade. Although various theoretical schemes have been proposed, experimenters have not yet been able to demonstrate two-atom gates of high fidelity due to experimental constraints. We propose a novel scheme, which only uses a single Rydberg pulse illuminating both atoms, for the construction of neutral-atom controlled-phase gates. In contrast to the existing schemes, our approach is simpler to implement and requires neither individual addressing of atoms nor adiabatic procedures. With parameters estimated based on actual experimental scenarios, a gate fidelity higher than 0.99 is achievable.

6 pages, 5 figures

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Cited by in corpus (12)

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• Symmetric Rydberg controlled-Z gates with adiabatic pulses
• Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity
• Photon recoil and laser focusing limits to Rydberg gate fidelity
• Fast, Accurate, and Realizable Two-Qubit Entangling Gates by Quantum Interference in Detuned Rabi Cycles of Rydberg Atoms
• Two-qubit controlled-PHASE Rydberg blockade gate protocol for neutral atoms via off-resonant modulated driving within a single pulse
• Shortcut-to-Adiabatic Controlled-Phase Gate in Rydberg Atoms
• Coherent spin-phonon scattering in facilitated Rydberg lattices
• Universal Barenco quantum gates via a tunable non-collinear interaction
• Error-budgeting for a controlled-phase gate with strontium-88 Rydberg atoms
• Symmetric $C_Z$ gate for ultracold neutral atoms based on counterdiabatic driving at Rydberg excitation