High-fidelity quantum memory using nitrogen-vacancy center ensemble for hybrid quantum computation

TL;DR

This paper proposes a hybrid quantum computing system utilizing nitrogen-vacancy center ensembles as quantum memory, combined with superconducting qubits and microwave photons, addressing decoherence and demonstrating potential for multi-qubit entanglement.

Contribution

It introduces a hybrid quantum architecture integrating NVEs, CBJJ superconducting qubits, and TLRs, with detailed decoherence analysis and feasibility assessment.

Findings

Decoherence effects are thoroughly analyzed in the storage process.

The system can generate multi-qubit W states of NVEs.

Experimental feasibility is supported with current technology.

Abstract

We study a hybrid quantum computing system using nitrogen-vacancy center ensemble (NVE) as quantum memory, current-biased Josephson junction (CBJJ) superconducting qubit fabricated in a transmission line resonator (TLR) as quantum computing processor and the microwave photons in TLR as quantum data bus. The storage process is seriously treated by considering all kinds of decoherence mechanisms. Such a hybrid quantum device can also be used to create multi-qubit W states of NVEs through a common CBJJ. The experimental feasibility and challenge are justified using currently available technology.