Noise avalanche and its quantum quenching in bosonic chains with random off-diagonal disorder

TL;DR

This paper investigates a noise avalanche phenomenon in disordered bosonic chains, showing that single-photon excitation can quench the noise, which has implications for controlling quantum noise in photonic systems.

Contribution

It reveals the noise avalanche in bosonic chains with off-diagonal disorder and demonstrates how single-photon excitation can effectively quench this noise.

Findings

Noise avalanche causes super-thermal photon bunching

Classical excitation cannot quench the avalanche

Single-photon excitation successfully quenches the avalanche

Abstract

Here we discuss a phenomenon of sharp increase in the photon number noise at initial stages of propagation in tight-binding bosonic chains with off-diagonal disorder. Such a "noise avalanche" occurs under classical coherent excitation of waveguides and leads to high super-thermal photon bunching. Additional classical excitation slows but cannot quench this noise avalanche. However, an additional single-photon excitation stops the avalanche.