Stabilizer codes for Open Quantum Systems

TL;DR

This paper introduces a method for constructing decoherence-free stabilizer codes for open quantum systems described by the Lindblad equation, extending stabilizer formalism beyond Pauli groups to improve quantum metrology.

Contribution

It develops a novel approach to create decoherence-free stabilizer codes for Lindblad systems by extending stabilizer formalism beyond Pauli groups, enabling better quantum metrology.

Findings

Constructed decoherence-free stabilizer codes for Lindblad systems.

Achieved Heisenberg limit scaling in quantum metrology.

Reduced computational complexity in code utilization.

Abstract

The Lindblad master equation describes the evolution of a large variety of open quantum systems. An important property of some open quantum systems is the existence of decoherence-free subspaces. A quantum state from a decoherence-free subspace will evolve unitarily. However, there is no procedural and optimal method for constructing a decoherence-free subspace. In this paper, we develop tools for constructing decoherence-free stabilizer codes for open quantum systems governed by Lindblad master equation. This is done by pursuing an extension of the stabilizer formalism beyond the celebrated group structure of Pauli error operators. We then show how to utilize decoherence-free stabilizer codes in quantum metrology in order to attain the Heisenberg limit scaling with low computational complexity.