Generation of atomic NOON states via adiabatic passage

TL;DR

This paper presents a robust method for generating atomic NOON states across distant cavities using adiabatic passage, which is resilient to common decoherence sources and feasible with current technology.

Contribution

It introduces a novel scheme employing adiabatic passage and a double Λ-type atom to produce large atomic NOON states in separate cavities with high fidelity.

Findings

High fidelity NOON states can be generated in distant cavities.

The scheme is robust against atomic spontaneous emission and cavity photon leakage.

Feasible with current experimental techniques.

Abstract

We propose a scheme for generating atomic NOON states via adiabatic passage. In the scheme, a double $\Lambda$-type three-level atom is trapped in a bimodal cavity and two sets of $\Lambda$-type three-level atoms are translated into and outside of two single mode cavities respectively. The three cavities connected by optical fibres are always in vacuum states. After a series of operations and suitable interaction time, we can obtain arbitrary large-$n$ NOON states of two sets of $\Lambda$-type three-level atoms in distant cavities by performing a single projective measurement on the double $\Lambda$-type three-level atom. Due to adiabatic elimination of atomic excited states and the application of adiabatic passage, our scheme is robust against the spontaneous emissions of atoms, the decays of fibres and cavities photon leakage. So the scheme has a high fidelity and feasibility under the current available techniques.