On the remote entanglement of MW qubits using hybrid Rydberg systems

Abstract

Distributed quantum computing is a promising architecture for the realization of scalable quantum computers. The cornerstone of such a quantum architecture is the ability to establish quantum correlations between remote computation modules. Remote entanglement and quantum logic gates have been demonstrated in a few physical systems enabled by coupling matter qubits to photons. However, building such a quantum architecture with superconducting qubits seems very challenging due to the lack of efficient matter-light quantum interface. Following our previous work on hybrid microwave-optical quantum gate, we propose a protocol to perform a remote quantum logic gate between distant superconducting quantum modules. MW qubits in distant modules are connected with photonic ancillary qubits and a hybrid Rydberg-cavity system is employed as the quantum mediator for microwave-optical photon interaction. We perform thorough analysis and find high-fidelity remote quantum logic gate is achievable by integrating state of the art quantum systems.