In situ upgrade of quantum simulators to universal computers
OA Location
Author(s)
Dive, B
Pitchford, Alexander
Burgarth, Daniel
Mintert, Florian
Type
Journal Article
Abstract
Quantum simulators, machines that can replicate the dynamics of quantum systems, are being built as useful devices and are seen as a stepping stone to universal quantum computers. A key difference between the two is that computers have the ability to perform the logic gates that make up algorithms. We propose a method for learning how to construct these gates efficiently by using the simulator to perform optimal control on itself. This bypasses two major problems of purely classical approaches to the control problem: the need to have an accurate model of the system, and a classical computer more powerful than the quantum one to carry out the required simulations. Strong evidence that the scheme scales polynomially in the number of qubits, for systems of up to 9 qubits with Ising interactions, is presented from numerical simulations carried out in different topologies. This suggests that this in situ approach is a practical way of upgrading quantum simulators to computers.
Date Issued
2018-08-08
Date Acceptance
2018-07-23
Citation
Quantum, 2018, 2, pp.80-80
ISSN
2521-327X
Publisher
Quantum
Start Page
80
End Page
80
Journal / Book Title
Quantum
Volume
2
Copyright Statement
This Paper is published in Quantum under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Copyright remains with the original copyright holders such as the authors or their institutions.
Sponsor
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://arxiv.org/abs/1701.01723
Grant Number
259264
N/A
Subjects
quant-ph
Publication Status
Published