Quantum Simulation and Optimization in Hot Quantum Networks

TL;DR

This paper introduces a solid-state quantum network architecture enabling long-range qubit interactions, fast gates, and quantum simulations without ground-state cooling, advancing scalable quantum computing and optimization.

Contribution

It presents a novel multi-mode transmission line setup for coherent qubit interactions over large distances, facilitating quantum gates and simulations without cooling requirements.

Findings

Enables fast deterministic quantum gates between distant qubits

Allows simulation of quantum spin models with engineered interactions

Provides a flexible platform for quantum optimization algorithms

Abstract

We propose and analyze a setup based on (solid-state) qubits coupled to a common multi-mode transmission line, which allows for coherent spin-spin interactions over macroscopic on-chip distances, without any ground-state cooling requirements for the data bus. Our approach allows for the realization of fast deterministic quantum gates between distant qubits, the simulation of quantum spin models with engineered (long-range) interactions, and provides a flexible architecture for the implementation of quantum approximate optimization algorithms.