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MASSS

Manipulation of a Single Spin in a Superconductor

Total Cost €

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EC-Contrib. €

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Partnership

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Project "MASSS" data sheet

The following table provides information about the project.

Coordinator
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS 

Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794
website: www.cnrs.fr

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 France [FR]
 Project website http://iramis.cea.fr/spec/Pres/Quantro/static/projects/josephson-effects-in-weak-links/manipulation-of-a-single-spin-in-a-superconductor/index.html
 Total cost 173˙076 €
 EC max contribution 173˙076 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2015
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2016
 Duration (year-month-day) from 2016-12-01   to  2018-11-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS FR (PARIS) coordinator 173˙076.00

Map

 Project objective

I propose to perform the coherent manipulation of the spin of a single superconducting quasiparticle. To achieve this challenging goal I will fabricate a Josephson weak-link coupling two superconducting electrodes through the two-dimensional electron gas of an AlSb/InAs/AlSb quantum well. The weak-link configuration allows to single out one superconducting quasiparticle, by trapping it in a low-energy discrete state (an Andreev bound state) completely disconnected from the continuum of excitations above the gap. The energy of this state depends on the superconducting phase difference across the link. It can be tuned by placing the weak-link in a superconducting loop threaded by a magnetic flux. The combination of a finite superconducting phase difference and the strong spin-orbit coupling energy in InAs lifts the degeneracy of the two spin states of the quasiparticle, which can therefore be addressed. In order to manipulate and probe the quantum state of the spin of the trapped quasiparticle I will couple this hybrid structure to the electromagnetic field of a microwave resonator in a circuit quantum electrodynamics (cQED) architecture. This project opens a new research path in the field of superconducting spintronics and leads to the exploration of new topological phases in multi-terminal devices.

 Publications

year authors and title journal last update
List of publications.
2019 L. Tosi, C. Metzger, M. F. Goffman, C. Urbina, H. Pothier, Sunghun Park, A. Levy Yeyati, J. Nygård, P. Krogstrup
Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
published pages: , ISSN: 2160-3308, DOI: 10.1103/physrevx.9.011010
Physical Review X 9/1 2019-05-20

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