Channel capacity of small modular quantum networks in the ultrastrongly coupled regime

TL;DR

This paper explores the potential of small modular quantum networks operating in the ultrastrong coupling regime, demonstrating high quantum capacity and robustness of adiabatic protocols against fluctuations and leakage effects.

Contribution

It introduces a novel analysis of quantum state transfer in ultrastrongly coupled modular networks, highlighting near-ideal capacity and robustness of adiabatic protocols.

Findings

Near-ideal quantum capacity achieved

Robustness against parametric fluctuations demonstrated

Leakage suppression via adiabatic protocols

Abstract

We investigate state-transfer in modular quantum computer architectures exploiting the ultrastrong coupling regime of interaction between quantum processing units and ICs. We show that protocols based on adiabatic coherent transport may achieve near-ideal single-letter quantum capacity and robustness against parametric fluctuations suppressing leakage induced by the dynamical Casimir effect.