Neutral atom entanglement using adiabatic Rydberg dressing

Abstract

We revisit the implementation of a two-qubit entangling gate, the Mølmer-Sørensen gate, using the adiabatic Rydberg dressing paradigm for neutral atoms as studied in [Phys. Rev. A 101, 030301 (R) (2020)]. We study the implementation of rapid adiabatic passage using a two-photon transition, which does not require the use of an ultra-violet laser, and can be implemented using only amplitude modulation of one field with all laser frequencies fixed. We find that entangling gate fidelities, comparable to the one-photon excitation, are achievable with the two-photon excitation. Moreover, we address how the adiabatic dressing protocol can be used to implement entangling gates outside the regime of a perfect Rydberg blockade. We show that using adiabatic dressing we can achieve scaling of gate fidelity set by the fundamental limits to entanglement generated by the Rydberg interactions while simultaneously retaining a limited population in the doubly-excited Rydberg state. This allows for fast high fidelity gates for atoms separated beyond the blockade radius.

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Cited by in corpus (9)

• Spin Squeezing by Rydberg Dressing in an Array of Atomic Ensembles
• Fault-tolerant quantum computation using large spin cat-codes
• High-fidelity Rydberg controlled-Z gates with optimal pulses
• Confined Meson Excitations in Rydberg-Atom Arrays Coupled to a Cavity Field
• Entangling quantum logic gates in neutral atoms via the microwave-driven spin-flip blockade
• High-fidelity and robust controlled-Z gates implemented with Rydberg atoms via echoing rapid adiabatic passage
• Resonant stroboscopic Rydberg dressing: electron-motion coupling and multi-body interactions
• Hamilton-Jacobi-Bellman equations for Rydberg-blockade processes
• Symmetric $C_Z$ gate for ultracold neutral atoms based on counterdiabatic driving at Rydberg excitation