Quantum processing by remote quantum control

TL;DR

This paper introduces a practical quantum remote control protocol enabling clients to perform computations on quantum servers while keeping certain information hidden, demonstrated experimentally with linear optics.

Contribution

It presents a novel, experimentally validated protocol for remote quantum control that maintains privacy and efficiency for near-term quantum technologies.

Findings

Experimental demonstration using linear optics

Protocol enables linear combination of quantum operations remotely

Maintains privacy and efficiency for larger quantum computations

Abstract

Client-server models enable computations to be hosted remotely on quantum servers. We present a novel protocol for realizing this task, with practical advantages when using technology feasible in the near term. Client tasks are realized as linear combinations of operations implemented by the server, where the linear coefficients are hidden from the server. We report on an experimental demonstration of our protocol using linear optics, which realizes linear combination of two single-qubit operations by a remote single-qubit control. In addition, we explain when our protocol can remain efficient for larger computations, as well as some ways in which privacy can be maintained using our protocol.