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Probing quantum walks through coherent control of high-dimensionally entangled photons

Control over the duration of a quantum walk is critical to unlocking its full potential for quantum search and the simulation of many-body physics. Here we report quantum walks of biphoton frequency combs where the duration of the walk, or circuit depth, is tunable over a continuous range without an...

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Detalles Bibliográficos
Autores principales: Imany, Poolad, Lingaraju, Navin B., Alshaykh, Mohammed S., Leaird, Daniel E., Weiner, Andrew M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7439509/
https://www.ncbi.nlm.nih.gov/pubmed/32832628
http://dx.doi.org/10.1126/sciadv.aba8066
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author Imany, Poolad
Lingaraju, Navin B.
Alshaykh, Mohammed S.
Leaird, Daniel E.
Weiner, Andrew M.
author_facet Imany, Poolad
Lingaraju, Navin B.
Alshaykh, Mohammed S.
Leaird, Daniel E.
Weiner, Andrew M.
author_sort Imany, Poolad
collection PubMed
description Control over the duration of a quantum walk is critical to unlocking its full potential for quantum search and the simulation of many-body physics. Here we report quantum walks of biphoton frequency combs where the duration of the walk, or circuit depth, is tunable over a continuous range without any change to the physical footprint of the system—a feature absent from previous photonic implementations. In our platform, entangled photon pairs hop between discrete frequency modes with the coupling between these modes mediated by electro-optic modulation of the waveguide refractive index. Through control of the phase across different modes, we demonstrate a rich variety of behavior: from walks exhibiting enhanced ballistic transport or strong energy confinement, to subspaces featuring scattering centers or local traps. We also explore the role of entanglement dimensionality in the creation of energy bound states, which illustrates the potential for these walks to quantify high-dimensional entanglement.
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spelling pubmed-74395092020-08-20 Probing quantum walks through coherent control of high-dimensionally entangled photons Imany, Poolad Lingaraju, Navin B. Alshaykh, Mohammed S. Leaird, Daniel E. Weiner, Andrew M. Sci Adv Research Articles Control over the duration of a quantum walk is critical to unlocking its full potential for quantum search and the simulation of many-body physics. Here we report quantum walks of biphoton frequency combs where the duration of the walk, or circuit depth, is tunable over a continuous range without any change to the physical footprint of the system—a feature absent from previous photonic implementations. In our platform, entangled photon pairs hop between discrete frequency modes with the coupling between these modes mediated by electro-optic modulation of the waveguide refractive index. Through control of the phase across different modes, we demonstrate a rich variety of behavior: from walks exhibiting enhanced ballistic transport or strong energy confinement, to subspaces featuring scattering centers or local traps. We also explore the role of entanglement dimensionality in the creation of energy bound states, which illustrates the potential for these walks to quantify high-dimensional entanglement. American Association for the Advancement of Science 2020-07-17 /pmc/articles/PMC7439509/ /pubmed/32832628 http://dx.doi.org/10.1126/sciadv.aba8066 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Imany, Poolad
Lingaraju, Navin B.
Alshaykh, Mohammed S.
Leaird, Daniel E.
Weiner, Andrew M.
Probing quantum walks through coherent control of high-dimensionally entangled photons
title Probing quantum walks through coherent control of high-dimensionally entangled photons
title_full Probing quantum walks through coherent control of high-dimensionally entangled photons
title_fullStr Probing quantum walks through coherent control of high-dimensionally entangled photons
title_full_unstemmed Probing quantum walks through coherent control of high-dimensionally entangled photons
title_short Probing quantum walks through coherent control of high-dimensionally entangled photons
title_sort probing quantum walks through coherent control of high-dimensionally entangled photons
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7439509/
https://www.ncbi.nlm.nih.gov/pubmed/32832628
http://dx.doi.org/10.1126/sciadv.aba8066
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