Chirped Multi-photon adiabatic passage for a four-level ladder-type Rydberg excitation

TL;DR

This paper introduces a multi-photon adiabatic passage technique using chirped laser frequencies to efficiently excite Rydberg atoms in a four-level ladder system, accounting for interatomic interactions.

Contribution

It presents a novel chirped multi-photon adiabatic passage method for Rydberg excitation in a four-level system, including the effects of interatomic interactions and applications to anti-blockade state preparation.

Findings

High-efficiency Rydberg excitation demonstrated

Influence of Rydberg interactions analyzed

Extension to anti-blockade state preparation

Abstract

We develop a multi-photon adiabatic passage to realize a highly efficient Rydberg excitation in a four-level ladder-type atomic system. The adiabatic passage is based on the existence of a novel quasi-dark state in the cascade excitation system where the frequencies of the lasers are appropriately chirped with time. We also investigate the influence of the interatomic Rydberg interaction on the passage and extend its application to the preparation of anti-blockade Rydberg atom pairs in the Rydberg blockade regime.