From quantum feedback to probabilistic error correction: Manipulation of quantum beats in cavity QED

TL;DR

This paper demonstrates how quantum feedback and probabilistic error correction can be implemented in cavity QED systems by manipulating quantum beats through measurements and external fields, enhancing coherence and error resilience.

Contribution

It introduces a method for controlling quantum states in cavity QED using feedback and error correction techniques, with a focus on experimental feasibility.

Findings

Robust quantum state manipulation demonstrated in realistic models

Quantum coherence can be shielded and corrected via conditional measurements

Potential for laboratory implementation of quantum error correction in cavity systems

Abstract

It is shown how to implement quantum feedback and probabilistic error correction in an open quantum system consisting of a single atom, with ground- and excited-state Zeeman structure, in a driven two-mode optical cavity. The ground state superposition is manipulated and controlled through conditional measurements and external fields, which shield the coherence and correct quantum errors. Modeling of an experimentally realistic situation demonstrates the robustness of the proposal for realization in the laboratory.