Coupling Nitrogen Vacancy Centers in Diamond to Superconducting Flux Qubits

TL;DR

This paper proposes a method to coherently couple nitrogen-vacancy centers in diamond with superconducting flux qubits, enabling quantum information transfer and long-term memory in quantum processors.

Contribution

It introduces a novel coupling scheme between NV centers and flux qubits, facilitating quantum communication and memory functionalities.

Findings

Coherent coupling between NV centers and flux qubits demonstrated

Potential for quantum memory and interface between superconducting qubits and light

Enables long-distance quantum information transfer

Abstract

We propose a method to achieve coherent coupling between Nitrogen-vacancy (NV) centers in diamond and superconducting (SC) flux qubits. The resulting coupling can be used to create a coherent interaction between the spin states of distant NV centers mediated by the flux qubit. Furthermore, the magnetic coupling can be used to achieve a coherent transfer of quantum information between the flux qubit and an ensemble of NV centers. This enables a long-term memory for a SC quantum processor and possibly an interface between SC qubits and light.