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.

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

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.)


Off-the-Shelf Polypeptide-based Immunotherapy for Advanced Melanoma Treatment

Read More  

ZeoMemRx (2019)

Greenhouse gases to valuable liquid chemicals: High-flux zeolite membrane-based reactor for the efficient conversion of CH4 and CO2

Read More  


The evolutionary genetics of transposable element invasions

Read More