Scalable quantum computation based on quantum actuated nuclear-spin decoherence-free qubits

TL;DR

This paper introduces a scalable quantum computing architecture utilizing decoherence-free nuclear spin qubits controlled by nitrogen-vacancy centers, achieving high fidelity operations and simplifying quantum system management.

Contribution

It presents a new architecture for quantum computation using quantum actuated decoherence-free qubits with high fidelity control and simplified system handling.

Findings

Fidelity of quantum control exceeds 99%

Long coherence times for nuclear spin qubits

Simplified quantum system management

Abstract

We propose a novel architecture for scalable quantum computation based on quantum actuated decoherence-free (DF) qubits. Each qubit is encoded by the DF subspace of a nuclear spin pair and has long coherence time. A nitrogen-vacancy center in diamond is chosen as the quantum actuator to realize initialization, readout and universal control of DF qubits with fidelities higher than 99%. It reduces the challenge of classical interfaces from controlling and observing complex quantum systems down to a simple quantum actuator. Our scheme also provides a novel way to handle complex quantum systems.