Decoherence and Interferometric Sensitivity of BosonSampling in Superconducting Networks

TL;DR

This paper evaluates the potential of superconducting resonator networks for boson sampling, analyzing their decoherence effects and interferometric sensitivity to assess scalability and performance.

Contribution

It provides a simulation-based analysis of superconducting networks for boson sampling, highlighting their feasibility and sensitivity to decay and perturbations.

Findings

Superconducting networks can implement boson sampling with measurable sensitivity.

Decoherence significantly affects the interferometric performance.

The system's sensitivity varies with decay rates and perturbations.

Abstract

Multiple bosons undergoing coherent evolution in a coupled network of sites constitute a so-called quantum walk system. The simplest example of such a two-particle interference is the celebrated Hong-Ou-Mandel interference. When scaling to larger boson numbers, simulating the exact distribution of bosons has been shown, under reasonable assumptions, to be exponentially hard. We analyze the feasibility and expected performance of a globally connected superconducting resonator based quantum walk system, using the known characteristics of state-of-the-art components. We simulate the sensitivity of such a system to decay processes and to perturbations and compare with coherent input states.