Exchange-Free Computation on an Unknown Qubit at a Distance

Hatim Salih; Jonte R. Hance; Will McCutcheon; Terry Rudolph; John Rarity

doi:10.1088/1367-2630/abd3c4

Exchange-Free Computation on an Unknown Qubit at a Distance

Hatim Salih^*, Jonte R. Hance, Will McCutcheon, Terry Rudolph, John Rarity

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

18 Citations (Scopus)

159 Downloads (Pure)

Abstract

We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are able to propose a protocol that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit. Further, we show how to use this for the exchange-free control of a universal two-qubit gate, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.

Original language	English
Article number	013004
Number of pages	10
Journal	New Journal of Physics
Volume	23
Issue number	1
DOIs	https://doi.org/10.1088/1367-2630/abd3c4
Publication status	Published - 19 Jan 2021

Bibliographical note

Funding Information:
We thank Claudio Marinelli for helping to bring this collaboration together. This work was supported by the Engineering and Physical Sciences Research Council (Grants EP/P510269/1, EP/T001011/1, EP/R513386/1, EP/M013472/1 and EP/L024020/1).

Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft

Research Groups and Themes

QETLabs
Bristol Quantum Information Institute
Photonics and Quantum

Keywords

quant-ph

Access to Document

10.1088/1367-2630/abd3c4

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QComms2: 8031 EP/T001011/1 Quantum Communication Hub via York
Rarity, J. G. (Principal Investigator), Nejabati, R. (Co-Investigator), Simeonidou, D. (Co-Investigator), Sahin, D. (Co-Investigator), Kanellos, G. (Co-Investigator), Aktas, D. V. C. (Researcher), Joshi, S. K. (Researcher), Lowndes, D. L. D. (Researcher), Venkatachalam, N. (Researcher), Hugues Salas, E. (Researcher), Woodland, E. M. (Manager), Erven, C. (Co-Investigator), Zhang, P. (Student), Hance, J. R. (Student), Clark, M. J. H. (Student), Rosenfeld, L. M. (Researcher), Hastings, E. M. J. (Student), Johlinger, F. B. (Student), Wang, R. (Researcher), Stange Tessinari, R. (Researcher), Solomons, N. R. (Student), Fasoulakis, T. (Student) & Alia, O. (Researcher)
1/12/19 → 30/11/24
Project: Research
Quantum Optics for Integrated Photonic Technologies
Rarity, J. G. (Principal Investigator)
16/06/14 → 15/06/19
Project: Research

The interplay between quantum foundations and quantum technologies: Counterfactual communication, and extensions of quantum mechanics
Hance, J. R. (Author), Ladyman, J. (Supervisor) & Rarity, J. (Supervisor), 21 Mar 2023
Student thesis: Doctoral Thesis › Doctor of Philosophy (PhD)

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Cite this

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abstract = "We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are able to propose a protocol that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit. Further, we show how to use this for the exchange-free control of a universal two-qubit gate, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.",

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AU - Salih, Hatim

AU - Hance, Jonte R.

AU - McCutcheon, Will

AU - Rudolph, Terry

AU - Rarity, John

N1 - Funding Information: We thank Claudio Marinelli for helping to bring this collaboration together. This work was supported by the Engineering and Physical Sciences Research Council (Grants EP/P510269/1, EP/T001011/1, EP/R513386/1, EP/M013472/1 and EP/L024020/1). Publisher Copyright: © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft

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N2 - We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are able to propose a protocol that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit. Further, we show how to use this for the exchange-free control of a universal two-qubit gate, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.

AB - We present a way of directly manipulating an arbitrary qubit, without the exchange of any particles. This includes as an application the exchange-free preparation of an arbitrary quantum state at Alice by a remote classical Bob. As a result, we are able to propose a protocol that allows one party to directly enact, by means of a suitable program, any computation exchange-free on a remote second party's unknown qubit. Further, we show how to use this for the exchange-free control of a universal two-qubit gate, thus opening the possibility of directly enacting any desired algorithm remotely on a programmable quantum circuit.

KW - quant-ph

U2 - 10.1088/1367-2630/abd3c4

DO - 10.1088/1367-2630/abd3c4

M3 - Article (Academic Journal)

SN - 1367-2630

VL - 23

JO - New Journal of Physics

JF - New Journal of Physics

IS - 1

M1 - 013004

ER -

Exchange-Free Computation on an Unknown Qubit at a Distance

Abstract

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Keywords

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Projects

QComms2: 8031 EP/T001011/1 Quantum Communication Hub via York

Quantum Optics for Integrated Photonic Technologies

Student theses

The interplay between quantum foundations and quantum technologies: Counterfactual communication, and extensions of quantum mechanics

Cite this