Coupling a single NV center with a superconducting qubit via the electro-optic effect

TL;DR

This paper presents a scheme for efficient quantum state transfer and entanglement generation between a nitrogen vacancy center and a superconducting qubit using the electro-optic effect, enabling advances in hybrid quantum systems.

Contribution

It introduces a novel hybrid system coupling NV centers and superconducting qubits via optical and microwave resonators connected through the electro-optic effect, achieving high fidelity operations.

Findings

High fidelity quantum state transfer demonstrated

Generation of highly entangled states between dissimilar qubits

Protocol compatible with current experimental techniques

Abstract

We propose an efficient scheme for transferring quantum states and generating entangled states between two qubits of different nature. The hybrid system consists a single nitrogen vacancy (NV) center and a superconducting (SC) qubit, which couple to an optical cavity and a microwave resonator, respectively. Meanwhile, the optical cavity and the microwave resonator are coupled via the electro-optic effect. By adjusting the relative parameters, we can achieve high fidelity quantum state transfer as well as highly entangled states between the NV center and the SC qubit. This protocol is within the reach of currently available techniques, and may provide interesting applications in quantum communication and computation with single NV centers and SC qubits.