# Photon cooling by dispersive atom-field coupling with atomic postselection

## TL;DR

This paper presents a method to cool a cavity field to its ground state using dispersive atom-field interactions and atomic postselection within a Ramsey interferometer, considering realistic experimental conditions.

## Contribution

It introduces a novel cavity cooling technique employing atomic postselection in a Ramsey interferometer, accounting for cavity and atomic losses.

## Key findings

- Effective ground state cooling achievable with realistic parameters.
- High-fidelity cooling demonstrated through theoretical analysis.
- Method applicable to current experimental setups.

## Abstract

We propose, in a Ramsey interferometer, to cool the cavity field to its ground state, starting from a thermal distribution by a dispersive atom-field coupling followed by an atomic postselection. We also analyze the effect of the cavity and atomic losses. The proposed experiment can be realized with realistic parameters with high fidelity.