Enhancing nonclassical bosonic correlations in a Quantum Walk network through experimental control of disorder

TL;DR

This paper experimentally demonstrates that controlled disorder in a quantum walk network can enhance nonclassical bosonic correlations between photons, enabling manipulation of quantum correlations through disorder configurations.

Contribution

It introduces a method to control and enhance quantum correlations in a quantum walk network by applying specific disorder configurations, revealing new ways to manipulate quantum resources.

Findings

Disorder can enhance quantum correlations between photons.

Different disorder configurations steer the system towards various correlation enhancements.

Experimental control of disorder enables manipulation of quantum correlations in quantum networks.

Abstract

The presence of disorder and inhomogeneities in quantum networks has often been unexpectedly beneficial for both quantum and classical resources. Here, we experimentally realize a controllable inhomogenous Quantum Walk dynamics, which can be exploited to investigate the effect of coherent disorder on the quantum correlations between two indistinguishable photons. Through the imposition of suitable disorder configurations, we observe two photon states which exhibit an enhancement in the quantum correlations between two modes of the network, compared to the case of an ordered Quantum Walk. Different configurations of disorder can steer the system towards different realizations of such an enhancement, thus allowing spatial and temporal manipulation of quantum correlations.