Opendata, web and dolomites


Josephson Junction Spectroscopy of Mesoscopic Systems

Total Cost €


EC-Contrib. €






 JSPEC project word cloud

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

wideband    probe    coupling    mesoscopic    pair    majorana    cryogenic    narrow    detecting    detector    techniques    bandgap    surpasses    suited    clear    chip    inherent    josephson    tool    purpose    quantum    scanning    signals    experiments    uniform    cooper    elementary    question    graphene    measuring    coherence    superconductor    original    absorption    microscope    vector    topological    superconducting    demonstrating    preliminary    possibility    physical    detect    analyzer    ones    camera    engineer    superconductors    proof    bound    junction    larger    lengths    condensed    links    background    spectroscopic    network    preserve    quanta    thz    spectrometer    powerful    probing    spectroscopy    inadequate    radioastronomy    outline    unresolved    microwave    signature    reveals    unfortunately    ultimately    noise    ghz    discover    describe    benefit    excited    jj    physics    excitations    instruments    atomic    conventional    itself    fundamental    lifetime    impedance    quasiparticle    sensitivity    recording    single    symmetries    radiation    circuits    ideally    2000    linewidth    spectrum    weak    interactions    small    mixer   

Project "JSPEC" data sheet

The following table provides information about the project.


Organization address
city: PARIS
postcode: 75005

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
 Total cost 1˙997˙497 €
 EC max contribution 1˙997˙497 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-04-01   to  2020-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    COLLEGE DE FRANCE FR (PARIS) coordinator 1˙997˙497.00


 Project objective

Spectroscopy is a powerful tool to probe matter. By measuring the spectrum of elementary excitations, one reveals the symmetries and interactions inherent in a physical system. Mesoscopic devices, which preserve quantum coherence over lengths larger than the atomic scale, offer a unique possibility to both engineer and investigate excitations at the single quanta level. Unfortunately, conventional spectroscopy techniques are inadequate for coupling radiation to mesoscopic systems and detecting their small absorption signals. I propose an on-chip, Josephson-junction based spectrometer which surpasses state-of-the-art instruments and is ideally suited for probing elementary excitations in mesoscopic systems. It has an original design providing uniform wideband coupling from 2-2000 GHz, low background noise, high sensitivity, and narrow linewidth.

I describe the operating principle and design of the spectrometer, show preliminary results demonstrating proof-of-concept, and outline three experiments which exploit the spectrometer to address important issues in condensed matter physics. The experiments are: measuring the lifetime of single quasiparticle and excited Cooper pair states in superconductors, a topic relevant for quantum information processing; determining whether graphene has a bandgap, a fundamental yet unresolved question; and recording a clear spectroscopic signature of Majorana bound states in topological superconductor weak links.

Various applications of the superconducting circuits developed for the spectrometer include a Josephson vector network analyzer, a cryogenic mixer, a THz camera, a detector for radioastronomy, and a scanning microwave impedance microscope. In itself the proposed JJ spectrometer is a general purpose tool that will benefit researchers studying mesoscopic systems. Ultimately, Josephson junction spectroscopy should not only be useful to detect existing elementary excitations but also to discover new ones.


year authors and title journal last update
List of publications.
2018 J. Griesmar
A mesoscopic spectrometer based on the Josephson effect
published pages: , ISSN: , DOI:
2019 J.-D. Pillet, V. Benzoni, J. Griesmar, J.-L. Smirr, Ç. Ö. Girit
Nonlocal Josephson Effect in Andreev Molecules
published pages: 7138-7143, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.9b02686
Nano Letters 19/10 2019-11-07

Are you the coordinator (or a participant) of this project? Plaese send me more information about the "JSPEC" project.

For instance: the website url (it has not provided by EU-opendata yet), the logo, a more detailed description of the project (in plain text as a rtf file or a word file), some pictures (as picture files, not embedded into any word file), twitter account, linkedin page, etc.

Send me an  email ( and I put them in your project's page as son as possible.

Thanks. And then put a link of this page into your project's website.

The information about "JSPEC" are provided by the European Opendata Portal: CORDIS opendata.

More projects from the same programme (H2020-EU.1.1.)

DimorphicCircuits (2019)

Elucidating the development of sexually-dimorphic circuits: from molecular mechanisms to synapses and behavior

Read More  

FICOMOL (2019)

Field Control of Cold Molecular Collisions

Read More  


Economic Fluctuations, Productivity Growth and Stabilization Policies: A Keynesian Growth Perspective

Read More