Blueprint of optically addressable molecular network for quantum circuit architecture

TL;DR

This paper proposes a molecular quantum circuit blueprint using optically addressable spin molecules, demonstrating potential for scalable quantum computing through optical control and integration with nano-photonics.

Contribution

It introduces a novel blueprint for molecular quantum circuits combining two-dimensional molecular networks and programmable nano-photonics, advancing the design of optically controlled quantum computing systems.

Findings

Calculated optically induced exchange interactions and spin dynamics.

Demonstrated an optically driven quantum gate operation scheme.

Proposed integration of molecular networks with nano-photonics for quantum circuits.

Abstract

Optically connecting quantum bits can effectively reduce decoherence and facilitate long-distance communication. Optically addressable spin-bearing molecules have been demonstrated to have a good potential for quantum computing. In this report optically induced exchange interactions and spin dynamics, which are inherently important for spin-based quantum computing, have been calculated for a bi-radical - a potential quantum computing circuit unit. Consistent with the previous experimental observation of spin coherence induced by optical excitation, our work demonstrated an optically driven quantum gate operation scheme, implying a great potential of molecular quantum-circuit network. A blueprint of quantum circuit, integrating two-dimensional molecular network and programmable nano-photonics, both of which have been under extensive investigations and rather mature, was proposed. We thus envisage computational exploration of chemical database to identify suitable candidates for molecular spin quantum bit and coupler, which could be optimally integrated with nano-photonic devices to realize quantum circuit. The work presented here would therefore open up a new direction to explore 'Click Chemistry' for quantum technology.