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Topological states with Spin-Dependent potentials for ultracold lithium

Total Cost €


EC-Contrib. €






 TopSpiD project word cloud

Explore the words cloud of the TopSpiD project. It provides you a very rough idea of what is the project "TopSpiD" about.

engineer    excitations    flow    tolerant    point    techniques    atomtronics    region    superfluid    equivalent    apparatus    topological    transport    kitaev    device    led    resonant    interesting    accessible    understand    easily    artificial    limiting    quantum    effect    statistics    detection    observables    computing    structures    near    spontaneous    create    ideal    channel    cooling    successful    insensitivity    atomtronic    magnetic    emission    normal    latter    intriguing    realize    heating    decoherence    leads    spin    experimental    superconductor    fermions    fault    give    researcher    bears    paving    invaluable    idea    boundary    beams    advantage    intermediate    metal    contact    appear    atomic    orbit    abelian    perspectives    platform    ultracold    scheme    combination    losses    atoms    atom    action    expert    team    hamiltonians    shine    potentials    model    phases    coupling    sought    exchange    combining    search    small    majorana    light    effort   

Project "TopSpiD" data sheet

The following table provides information about the project.


Organization address
address: Raemistrasse 101
postcode: 8092

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 Switzerland [CH]
 Total cost 175˙419 €
 EC max contribution 175˙419 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2018
 Duration (year-month-day) from 2018-07-01   to  2020-06-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The recent understanding of the topological properties of matter has led to the search for the experimental production and control of topological excitations such as Majorana fermions. They appear at the boundary between a topological superconductor and a normal metal and have intriguing properties such as non-abelian exchange statistics and insensitivity to decoherence. Their production would give an invaluable insight on the properties of topological phases of matter as well as paving the way towards fault-tolerant quantum computing. The aim of this action is to create them in an ultracold atom set-up which is a ideal platform to engineer interesting Hamiltonians.

We propose to create such excitations by combining effective spin-orbit coupling with superfluid properties. We will use near-resonant light which has led to the successful implementation of artificial magnetic fields and spin-orbit coupling in ultracold atoms. We want to produce the latter coupling while limiting the associated heating due to spontaneous emission: the key idea is to shine the near-resonant beams on a very small region, where spontaneous emission leads to losses but not to heating.

We already have an apparatus able to realize the atomic equivalent of a quantum point contact. In this project, the experienced researcher, already expert in ultracold atom techniques, will lead the experimental team effort. As intermediate results, we will study the flow of atoms through “atomtronics” light structures, implement a cooling scheme using such an atomtronic device and understand the effect of increased losses in the channel on transport.

The combination of these new potentials with superfluid behaviour for ultracold atoms leads to the implementation of the Kitaev model that bears the highly sought Majorana excitations, and detection will take advantage of easily accessible transport observables. The atomtronics techniques developed would open wide perspectives for future studies.


year authors and title journal last update
List of publications.
2019 Laura Corman, Philipp Fabritius, Samuel Häusler, Jeffrey Mohan, Lena H. Dogra, Dominik Husmann, Martin Lebrat, Tilman Esslinger
Quantized conductance through a dissipative atomic point contact
published pages: , ISSN: 2469-9926, DOI: 10.1103/physreva.100.053605
Physical Review A 100/5 2020-01-27
2018 Dominik Husmann, Martin Lebrat, Samuel Häusler, Jean-Philippe Brantut, Laura Corman, Tilman Esslinger
Breakdown of the Wiedemann–Franz law in a unitary Fermi gas
published pages: 8563-8568, ISSN: 0027-8424, DOI: 10.1073/pnas.1803336115
Proceedings of the National Academy of Sciences 115/34 2020-01-27
2019 Martin Lebrat, Samuel Häusler, Philipp Fabritius, Dominik Husmann, Laura Corman, Tilman Esslinger
Quantized Conductance through a Spin-Selective Atomic Point Contact
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.123.193605
Physical Review Letters 123/19 2020-01-27
2019 G. Salerno, H. M. Price, M. Lebrat, S. Häusler, T. Esslinger, L. Corman, J.-P. Brantut, N. Goldman
Quantized Hall Conductance of a Single Atomic Wire: A Proposal Based on Synthetic Dimensions
published pages: , ISSN: 2160-3308, DOI: 10.1103/physrevx.9.041001
Physical Review X 9/4 2020-01-27

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