Quantum memory using a hybrid circuit with flux qubits and NV centers

TL;DR

This paper proposes a hybrid quantum architecture combining flux qubits and NV centers for high-fidelity quantum memory, effectively isolating memory from processing and demonstrating robustness and feasibility with current technology.

Contribution

It introduces a novel hybrid circuit design that separates quantum computing and memory units, enhancing fidelity and robustness in quantum storage.

Findings

High-fidelity quantum storage achieved with the proposed hybrid system.

The design effectively isolates quantum memory from processing influences.

The approach is feasible with existing experimental technology.

Abstract

We propose how to realize high-fidelity quantum storage using a hybrid quantum architecture including two coupled flux qubits and a nitrogen-vacancy center ensemble (NVE). One of the flux qubits is considered as the quantum computing processor and the NVE serves as the quantum memory. By separating the computing and memory units, the influence of the quantum computing process on the quantum memory can be effectively eliminated, and hence the quantum storage of an arbitrary quantum state of the computing qubit could be achieved with high fidelity. Furthermore the present proposal is robust with respect to fluctuations of the system parameters, and it is experimentally feasibile with currently available technology.