Hyper-parallel photonic quantum computation with coupled quantum dots

Hyper-parallel photonic quantum computation with coupled quantum dots

It is well known that a parallel quantum computer is more powerful than a classical one. So far, there are some important works about the construction of universal quantum logic gates, the key elements in quantum computation. However, they are focused on operating on one degree of freedom (DOF) of q...

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Main Authors: Ren, Bao-Cang, Deng, Fu-Guo
Format: Online
Language:English
Published: Nature Publishing Group 2014
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3983618/
id pubmed-3983618
recordtype oai_dc
spelling pubmed-39836182014-04-11 Hyper-parallel photonic quantum computation with coupled quantum dots Ren, Bao-Cang Deng, Fu-Guo Article It is well known that a parallel quantum computer is more powerful than a classical one. So far, there are some important works about the construction of universal quantum logic gates, the key elements in quantum computation. However, they are focused on operating on one degree of freedom (DOF) of quantum systems. Here, we investigate the possibility of achieving scalable hyper-parallel quantum computation based on two DOFs of photon systems. We construct a deterministic hyper-controlled-not (hyper-CNOT) gate operating on both the spatial-mode and the polarization DOFs of a two-photon system simultaneously, by exploiting the giant optical circular birefringence induced by quantum-dot spins in double-sided optical microcavities as a result of cavity quantum electrodynamics (QED). This hyper-CNOT gate is implemented by manipulating the four qubits in the two DOFs of a two-photon system without auxiliary spatial modes or polarization modes. It reduces the operation time and the resources consumed in quantum information processing, and it is more robust against the photonic dissipation noise, compared with the integration of several cascaded CNOT gates in one DOF. Nature Publishing Group 2014-04-11 /pmc/articles/PMC3983618/ /pubmed/24721781 http://dx.doi.org/10.1038/srep04623 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The images in this article are included in the article's Creative Commons license, unless indicated otherwise in the image credit; if the image is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the image. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Ren, Bao-Cang
Deng, Fu-Guo
spellingShingle Ren, Bao-Cang
Deng, Fu-Guo
Hyper-parallel photonic quantum computation with coupled quantum dots
author_facet Ren, Bao-Cang
Deng, Fu-Guo
author_sort Ren, Bao-Cang
title Hyper-parallel photonic quantum computation with coupled quantum dots
title_short Hyper-parallel photonic quantum computation with coupled quantum dots
title_full Hyper-parallel photonic quantum computation with coupled quantum dots
title_fullStr Hyper-parallel photonic quantum computation with coupled quantum dots
title_full_unstemmed Hyper-parallel photonic quantum computation with coupled quantum dots
title_sort hyper-parallel photonic quantum computation with coupled quantum dots
description It is well known that a parallel quantum computer is more powerful than a classical one. So far, there are some important works about the construction of universal quantum logic gates, the key elements in quantum computation. However, they are focused on operating on one degree of freedom (DOF) of quantum systems. Here, we investigate the possibility of achieving scalable hyper-parallel quantum computation based on two DOFs of photon systems. We construct a deterministic hyper-controlled-not (hyper-CNOT) gate operating on both the spatial-mode and the polarization DOFs of a two-photon system simultaneously, by exploiting the giant optical circular birefringence induced by quantum-dot spins in double-sided optical microcavities as a result of cavity quantum electrodynamics (QED). This hyper-CNOT gate is implemented by manipulating the four qubits in the two DOFs of a two-photon system without auxiliary spatial modes or polarization modes. It reduces the operation time and the resources consumed in quantum information processing, and it is more robust against the photonic dissipation noise, compared with the integration of several cascaded CNOT gates in one DOF.
publisher Nature Publishing Group
publishDate 2014
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3983618/
_version_ 1612077086753685504

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