Coherent Quantum Transport in Photonic Lattices

TL;DR

This paper demonstrates perfect quantum state transfer across a photonic lattice with 19 sites, showcasing high-fidelity coherent transfer applicable to quantum and classical regimes, advancing integrated quantum computing.

Contribution

First experimental realization of perfect quantum state transfer on a lattice using optical waveguides, applicable to both bosons and fermions, indicating potential for scalable quantum computing.

Findings

Coherent transfer over 19 sites achieved with high fidelity

Applicable to both quantum particles and classical light

Demonstrates feasibility of integrated quantum information transfer

Abstract

Transferring quantum states efficiently between distant nodes of an information processing circuit is of paramount importance for scalable quantum computing. We report on the first observation of a perfect state transfer protocol on a lattice, thereby demonstrating the general concept of trans- porting arbitrary quantum information with high fidelity. Coherent transfer over 19 sites is realized by utilizing judiciously designed optical structures consisting of evanescently coupled waveguide ele- ments. We provide unequivocal evidence that such an approach is applicable in the quantum regime, for both bosons and fermions, as well as in the classical limit. Our results illustrate the potential of the perfect state transfer protocol as a promising route towards integrated quantum computing on a chip.