Nuclear electric resonance

TL;DR

This paper introduces nuclear electric resonance, a method for manipulating nuclear-spin qubits electrically that preserves long coherence times and enables universal quantum gates, significantly improving single-qubit operation counts.

Contribution

It proposes a novel electrical manipulation technique for nuclear spins that addresses single nuclei without compromising coherence, applicable to arbitrary spin nuclei, and enhances quantum gate performance.

Findings

Achieves single-nucleus addressability with electrical control.

Maintains long nuclear coherence times during manipulation.

Increases single-qubit operation count by three orders of magnitude.

Abstract

Nuclear-spin qubits have long coherence time and are desirably applied into quantum information processing. However, the existing methods either fail to address single nucleus (such as nuclear magnetic resonance), or severely affect nuclear coherence time (such as electrical nuclear manipulation based on hyperfine stark effect, ENMHSE). Here we propose an electrical nuclear manipulation called nuclear electric resonance which can on the one hand address the single nuclear qubit, and on the other keep the long coherence time. Applying this, we construct universal quantum gates with external electric field. These universal gates are practicable for arbitrary $S\ge 1$ spin nuclei. Given the much longer coherence time of nuclear electric resonance, we improve the number of single-qubit operations by three orders of magnitude compared with that of ENMHSE.