Multiphoton controllable transport between remote resonators

TL;DR

This paper introduces a new method for controlling multiphoton transport between remote resonators using an auxiliary resonator, enabling high-fidelity quantum state transmission or reflection over arbitrary distances.

Contribution

It presents a novel approach for long-range multiphoton control via an auxiliary resonator and coupled chain, with theoretical bounds on information leakage and numerical validation.

Findings

High-fidelity multiphoton transmission and reflection achievable

Quantum information leakage can be minimized arbitrarily

Numerical simulations confirm theoretical bounds

Abstract

We develop a novel method for multiphoton controllable transport between remote resonators. Specifically, an auxiliary resonator is used to control the coherent long-range coupling of two spatially separated resonators, mediated by a coupled-resonator chain of arbitrary length. In this manner, an arbitrary multiphoton quantum state can be either transmitted through or reflected off the intermediate chain on demand, with very high fidelity. We find, on using a time-independent perturbative treatment, that quantum information leakage of an arbitrary Fock state is limited by two upper bounds, one for the transmitted case and the other for the reflected case. In principle, the two upper bounds can be made arbitrarily small, which is confirmed by numerical simulations.