Quantum Borrmann effect for dissipation-immune photon-photon correlations

TL;DR

This paper theoretically demonstrates that photon-photon correlations in a waveguide with superconducting qubits exhibit long-lasting quantum effects due to the Borrmann effect, making them resistant to dissipation.

Contribution

It introduces the concept of dissipation-immune photon-photon correlations enabled by the Borrmann effect in a Bragg-spaced qubit array, a novel collective phenomenon.

Findings

Photon bunching and anti-bunching persist longer than qubit lifetimes.

Photon correlations become immune to non-radiative dissipation.

The Borrmann effect enables non-Markovian collective light-qubit interactions.

Abstract

We study theoretically the second-order correlation function $g^{(2)}(t)$ for photons transmitted through a periodic Bragg-spaced array of superconducting qubits, coupled to a waveguide. We demonstrate that photon bunching and anti-bunching persist much longer than both radiative and non-radiative lifetimes of a single qubit. The photon-photon correlations become immune to non-radiative dissipation due to the Borrmann effect, that is a strongly non-Markovian collective feature of light-qubit coupling inherent to the Bragg regime. This persistence of quantum correlations opens new avenues for enhancing the performance of setups of waveguide quantum electrodynamics.