Chirped pulse excitation of two-atom Rydberg states

TL;DR

This paper investigates the use of chirped optical pulses to efficiently excite two-atom Rydberg states and implement quantum gates, demonstrating feasible parameters for high transfer efficiency and controlled phase operations.

Contribution

It introduces a method for adiabatic excitation of Rydberg states using chirped pulses, enabling high-fidelity quantum gate operations with realistic experimental conditions.

Findings

High transfer efficiency achieved with feasible Rabi frequencies and chirp rates.

Adiabatic transfer can be used to implement controlled phase gates.

Effective for atoms separated by about ten micrometers.

Abstract

We analyze excitation of two ground state atoms to a double Rydberg state by a two-photon chirped optical pulse in the regime of adiabatic rapid passage. For intermediate Rydberg-Rydberg interaction strengths, relevant for atoms separated by $\sim$ten $\mu$m, adiabatic excitation can be achieved at experimentally feasible Rabi frequencies and chirp rates of the pulses, resulting in high transfer efficiencies. We also study the adiabatic transfer between ground and Rydberg states as a means to realize a controlled phase gate between atomic qubits.