Adiabatic passage of radiofrequency-assisted Forster resonances in Rydberg atoms for two-qubit gates and generation of Bell states

Abstract

High-fidelity entangled Bell states are of great interest in quantum physics. Entanglement of ultracold neutral atoms in two spatially separated optical dipole traps is promising for implementation of quantum computing and quantum simulation and for investigation of Bell states of material objects. We propose a new method to entangle two atoms via long-range Rydberg-Rydberg interaction. Alternatively to previous approaches, based on Rydberg blockade, we consider radiofrequency-assisted Stark-tuned Förster resonances in Rb Rydberg atoms. To reduce the sensitivity of the fidelity of Bell states to the fluctuations of interatomic distance, we propose to use the double adiabatic passage across the radiofrequency-assisted Stark-tuned Förster resonances, which results in a deterministic phase shift of the two-atom state.

8 pages, 7 figures

References in corpus (5)

• Quasiclassical calculations of BBR-induced depopulation rates and effective lifetimes of Rydberg nS, nP and nD alkali-metal atoms with n < 80
• Coherent dipole-dipole coupling between two single atoms at a Förster resonance
• Cavity Carving of Atomic Bell States
• Applicability of Rydberg atoms to quantum computers
• Controlling the interactions of a few cold Rb Rydberg atoms by radiofrequency-assisted Förster resonances

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