# Conditional phase gate and quantum state transfer via off-resonant quantum Zeno dynamics

## TL;DR

This paper presents a scheme for implementing a conditional phase gate and quantum state transfer between NV center qubits using off-resonant quantum Zeno dynamics, achieving high fidelity without populating cavity photons or excited states.

## Contribution

It introduces a novel approach leveraging off-resonant quantum Zeno dynamics for robust quantum gates and state transfer with immunity to certain decay channels.

## Key findings

- High fidelity of quantum state transfer achieved
- Conditional phase gate demonstrated with high accuracy
- Scheme remains effective under realistic imperfections

## Abstract

We propose a scheme to realize the conditional phase gate (CPG) and quantum state transfer (QST) between two qubits (acted by nitrogen-vacancy (NV) centers) based on off-resonant quantum Zeno dynamics. We also consider the entanglement dynamics of two qubits in this system. Since no cavity photons or excited levels of the NV center is populated during the whole process, the scheme is immune to the decay of cavity and spontaneous emission of the NV center. The strictly numerical simulation shows that the fidelities of QST and CPG are high even in the presence of realistic imperfections.