All-optical quantum computing with a hybrid solid-state processing unit

TL;DR

This paper proposes a hybrid solid-state quantum computing architecture that enables distant, nonidentical qubits to interact via optical control, promising scalable quantum computation with reduced dissipation effects.

Contribution

It introduces a novel hybrid architecture allowing integration of diverse solid-state qubits for universal quantum computing using optical methods.

Findings

Distant solid-state qubits can interact via cavity QED.

Quantum nondemolition measurements are feasible.

The architecture is robust against dissipation.

Abstract

We develop an architecture of hybrid quantum solid-state processing unit for universal quantum computing. The architecture allows distant and nonidentical solid-state qubits in distinct physical systems to interact and work collaboratively. All the quantum computing procedures are controlled by optical methods using classical fields and cavity QED. Our methods have prominent advantage of the insensitivity to dissipation process benefiting from the virtual excitation of subsystems. Moreover, the QND measurements and state transfer for the solid-state qubits are proposed. The architecture opens promising perspectives for implementing scalable quantum computation in a broader sense that different solid-state systems can merge and be integrated into one quantum processor afterwards.