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Quantum devices in topological matter: carbon nanotubes, graphene, and novel superfluids

Total Cost €


EC-Contrib. €






 QuDeT project word cloud

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

misfit    probed    helium    cooling    condensates    ground    mechanical    temperature    single    superfluid    3he    sheets    drastically    superconductivity    interfaces    linear    voltage    biased    defects    quantum    optomechanics    origin    hopg    reaching    suspended    thin    objects    phases    quality    deduce    modified    ensembles    immersed    intriguingly    refrigeration    supercurrents    ultrasensitive    object    coupling    provides    graphite    acts    gate    besides    motion    nuclear    boron    swnts    walled    limit    gt    relies    nanomechanical    mk    metastable    resonators    mesoscopic    facilitates    immersion    resonator    superfluidity    microwave    nitride    introducing    interface    proximity    formed    graphene    topological    look    substrate    circuit    pairing    cavity    carbon    layer    nanotubes    tunnelling    cooled    layers    dislocation    swnt    phonon    atomic    materials    extraordinary    trivial    reached    anharmonic    hybrid    adiabatic    interacting    interactions    macroscopic    excitonic    below    detectors    vacuum    minimum    fock    oscillator   

Project "QuDeT" data sheet

The following table provides information about the project.


Organization address
address: OTAKAARI 1
city: ESPOO
postcode: 2150

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 Finland [FI]
 Total cost 2˙398˙536 €
 EC max contribution 2˙398˙536 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-ADG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-01-01   to  2020-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    AALTO KORKEAKOULUSAATIO SR FI (ESPOO) coordinator 2˙398˙536.00


 Project objective

The project addresses quantum devices in hybrid systems formed using carbon nanotubes, graphene, and 3He superfluid, all with particular topological characteristics. Topological properties of these non-trivial materials can be drastically modified by introducing defects or interfaces into them, like single layer graphene into superfluid helium, boron nitride between graphene sheets, carbon nanotubes in 3He superfluid, or misfit dislocation layers into HOPG graphite.

We are particularly interested in graphene/3He systems where graphene acts as an interface/substrate of interacting atomic ensembles. The atomic interactions across graphene are expected to provide novel mesoscopic condensates. By studying the topological phases of thin 3He layers and graphene immersed into superfluid 3He, we will investigate pairing across the graphene interface, deduce the origin of supercurrents, and look for excitonic superfluidity in these systems.

Single walled carbon nanotubes provide high-quality nanomechanical resonators with extraordinary properties. By using proximity-induced superconductivity, these objects will be integrated into circuit optomechanics in a way that facilitates strong coupling between the mechanical motion and the microwave cavity. By using adiabatic nuclear refrigeration, these non-linear quantum objects will be cooled below 1 mK, at the temperature of which the quantum ground state is reached. The cooling relies on immersion of the SWNT into superfluid 3He which, in the limit T -> 0, provides a quantum vacuum with unique topological properties. Intriguingly, the characteristics of this vacuum can be probed by ultrasensitive detectors provided by the suspended SWNTs.

Finally, besides non-classical phonon states, e.g. Fock states in the mechanical resonator, reaching the ground state of such an anharmonic oscillator will allow studies of quantum tunnelling of a macroscopic object from its metastable minimum when biased with a large gate voltage.


year authors and title journal last update
List of publications.
2017 Teemu Elo, Pasi Lähteenmäki, Dmitri Golubev, Alexander Savin, Konstantin Arutyunov, Pertti Hakonen
Thermal Relaxation in Titanium Nanowires: Signatures of Inelastic Electron-Boundary Scattering in Heat Transfer
published pages: 204-216, ISSN: 0022-2291, DOI: 10.1007/s10909-017-1802-2
Journal of Low Temperature Physics 189/3-4 2019-09-30
2018 Antti Laitinen, Manohar Kumar, Pertti Hakonen, Edouard Sonin
Gyrotropic Zener tunneling and nonlinear IV curves in the zero-energy Landau level of graphene in a strong magnetic field
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-017-18959-7
Scientific Reports 8/1 2019-09-30
2018 Antti Laitinen, Manohar Kumar, Teemu Elo, Ying Liu, T. S. Abhilash, Pertti J. Hakonen
Breakdown of Zero-Energy Quantum Hall State in Graphene in the Light of Current Fluctuations and Shot Noise
published pages: 272-287, ISSN: 0022-2291, DOI: 10.1007/s10909-018-1855-x
Journal of Low Temperature Physics 191/5-6 2019-09-30
2018 Antti Laitinen, Manohar Kumar, Pertti J. Hakonen
Weak antilocalization of composite fermions in graphene
published pages: 75113, ISSN: 2469-9950, DOI: 10.1103/PhysRevB.97.075113
Physical Review B 97/7 2019-09-30
2018 I. Todoshchenko
Finite-size effects in thermodynamics: Negative compressibility and global instability in two-phase systems
published pages: 134101, ISSN: 2469-9950, DOI: 10.1103/PhysRevB.97.134101
Physical Review B 97/13 2019-09-30
2018 Manohar Kumar, Antti Laitinen, Pertti Hakonen
Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-05094-8
Nature Communications 9/1 2019-09-30
2018 V. V. Zavjalov, A. M. Savin, P. J. Hakonen
Cryogenic Differential Amplifier for NMR Applications
published pages: , ISSN: 0022-2291, DOI: 10.1007/s10909-018-02130-1
Journal of Low Temperature Physics 2019-09-30

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