Optomechanical transducers for quantum information processing

TL;DR

This paper explores optomechanical transducers as a versatile interface for quantum networks, enabling long-distance communication and local entangling gates across various solid-state qubit systems.

Contribution

It provides a comprehensive theoretical framework for optomechanical quantum networks and introduces protocols for state transfer and entangling gates.

Findings

Effective description of multi-qubit networks

Protocol for long-distance quantum state transfer

Methods for on-chip entangling interactions

Abstract

We discuss the implementation of optical quantum networks where the interface between stationary and photonic qubits is realized by optomechanical transducers [K. Stannigel et al., PRL 105, 220501 (2010)]. This approach does not rely on the optical properties of the qubit and thereby enables optical quantum communication applications for a wide range of solid-state spin- and charge-based systems. We present an effective description of such networks for many qubits and give a derivation of a state transfer protocol for long-distance quantum communication. We also describe how to mediate local on-chip interactions by means of the optomechanical transducers that can be used for entangling gates. We finally discuss experimental systems for the realization of our proposal.