Superradiance as a Source of Collective Decoherence in Quantum Computers

TL;DR

This paper discusses how superradiance causes non-local noise in quantum computers, posing a challenge for fault-tolerant error correction methods.

Contribution

It highlights superradiance as a source of collective decoherence that current quantum error correction models cannot address.

Findings

Superradiance leads to non-local noise in quantum systems.

Current fault-tolerance models are insufficient against superradiance-induced errors.

Superradiance acts as a fundamental limit to quantum coherence in certain architectures.

Abstract

We argue that superradiance (collective emission) due to radiative coupling of qubit states results in non-local noise, and thus introduces an error source that cannot be corrected using current models of fault-tolerant quantum computation.