Transfer arbitrary photon state along a cavity array without initialization

TL;DR

This paper introduces a quantum state transfer method that reliably moves any single-photon state along a cavity array without requiring initial state preparation, leveraging spin chain analogies for high fidelity transfer.

Contribution

It maps quantum state transfer in a cavity array to spin chain models, enabling high fidelity transfer of arbitrary photon states without initialization.

Findings

High fidelity transfer achieved for various initial states

Numerical simulations demonstrate effective state transfer at specific times

Scheme applicable to experimental cavity array systems

Abstract

We propose a quantum state transfer (QST) scheme that transfers any single-mode photon state along a one-dimensional coupled-cavity array (CCA). By building a map from QST in a CCA to that in a spin-$\frac{1}{2}$ chain, we show that all the previous results of QST schemes for the spin chain system find paralleled applications in that in the CCA system. Further more, high fidelity QST along a long CCA can be achieved for arbitrary initial states. Using numerical simulations we provide a visual presentation of the result: at some time $\tau$ the CCA system get high fidelity QST under different initial conditions. Finally we discuss possible experimental realizations of our QST scheme.