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DG-PESP-CS SIGNED

Deterministic Generation of Polarization Entangled single Photons Cluster States

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EC-Contrib. €

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Project "DG-PESP-CS" data sheet

The following table provides information about the project.

Coordinator
TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY 

Organization address
address: SENATE BUILDING TECHNION CITY
city: HAIFA
postcode: 32000
website: www.technion.ac.il

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Israel [IL]
 Total cost 2˙502˙974 €
 EC max contribution 2˙502˙974 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-AdG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-06-01   to  2021-05-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY IL (HAIFA) coordinator 2˙502˙974.00

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 Project objective

Measurement based quantum computing is one of the most fault-tolerant architectures proposed for quantum information processing. It opens the possibility of performing quantum computing tasks using linear optical systems. An efficient route for measurement based quantum computing utilizes highly entangled states of photons, called cluster states. Propagation and processing quantum information is made possible this way using only single qubit measurements. It is highly resilient to qubit losses. In addition, single qubit measurements of polarization qubits is easily performed with high fidelity using standard optical tools. These features make photonic clusters excellent platforms for quantum information processing. Constructing photonic cluster states, however, is a formidable challenge, attracting vast amounts of research efforts. While in principle it is possible to build up cluster states using interferometry, such a method is of a probabilistic nature and entails a large overhead of resources. The use of entangled photon pairs reduces this overhead by a small factor only. We outline a novel route for constructing a deterministic source of photonic cluster states using a device based on semiconductor quantum dot. Our proposal follows a suggestion by Lindner and Rudolph. We use repeated optical excitations of a long lived coherent spin confined in a single semiconductor quantum dot and demonstrate for the first time practical realization of their proposal. Our preliminary demonstration presents a breakthrough in quantum technology since deterministic source of photonic cluster, reduces the resources needed quantum information processing. It may have revolutionary prospects for technological applications as well as to our fundamental understanding of quantum systems. We propose to capitalize on this recent breakthrough and concentrate on R&D which will further advance this forefront field of science and technology by utilizing the horizons that it opens.

 Publications

year authors and title journal last update
List of publications.
2018 Dan Cogan, Oded Kenneth, Netanel H. Lindner, Giora Peniakov, Caspar Hopfmann, Dan Dalacu, Philip J. Poole, Pawel Hawrylak, David Gershoni
Depolarization of Electronic Spin Qubits Confined in Semiconductor Quantum Dots
published pages: , ISSN: 2160-3308, DOI: 10.1103/physrevx.8.041050
Physical Review X 8/4 2019-02-27
2017 Tobias Heindel, Alexander Thoma, Ido Schwartz, Emma R. Schmidgall, Liron Gantz, Dan Cogan, Max Strauß, Peter Schnauber, Manuel Gschrey, Jan-Hindrik Schulze, Andre Strittmatter, Sven Rodt, David Gershoni, Stephan Reitzenstein
Accessing the dark exciton spin in deterministic quantum-dot microlenses
published pages: 121303, ISSN: 2378-0967, DOI: 10.1063/1.5004147
APL Photonics 2/12 2019-06-13
2017 R. Winik, D. Cogan, Y. Don, I. Schwartz, L. Gantz, E. R. Schmidgall, N. Livneh, R. Rapaport, E. Buks, D. Gershoni
On-demand source of maximally entangled photon pairs using the biexciton-exciton radiative cascade
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.95.235435
Physical Review B 95/23 2019-06-13
2016 I. Schwartz, D. Cogan, E. R. Schmidgall, Y. Don, L. Gantz, O. Kenneth, N. H. Lindner, D. Gershoni
Deterministic generation of a cluster state of entangled photons
published pages: 434-437, ISSN: 0036-8075, DOI: 10.1126/science.aah4758
Science 354/6311 2019-06-13

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