# Long-distance entangling gates between quantum dot spins mediated by a superconducting resonator

## TL;DR

This paper theoretically analyzes long-distance quantum dot spin interactions mediated by a superconducting resonator, proposing a protocol for fast, high-fidelity two-qubit gates that outperform charge qubit gates under noise.

## Contribution

It introduces a theoretical framework for effective spin-spin interactions via a resonator and proposes a protocol for high-fidelity two-qubit gates in quantum dot systems.

## Key findings

- Spin-spin entangling gates outperform charge qubit gates under noise.
- Proposed protocol achieves fast, high-fidelity two-qubit operations.
- Theoretical calculations support experimental feasibility.

## Abstract

Recent experiments with silicon qubits demonstrated strong coupling of a microwave resonator to the spin of a single electron in a double quantum dot, opening up the possibility of long-range spin-spin interactions. We present our theoretical calculation of effective interactions between distant quantum dot spins coupled by a resonator, and propose a protocol for fast, high-fidelity two-qubit gates consistent with experimentally demonstrated capabilities. Our simulations show that, in the presence of noise, spin-spin entangling gates significantly outperform cavity-mediated gates on charge qubits.