Research in QPC team

Scientific Highlights:

  • Analog quantum simulation at the threshold of quantum supremacy, using a quantum circuit to emulate a Luttinger liquid with a single impurity (Phys. Rev. X, 2018).
  • Tunable quantum criticality and super-ballistic transport explored in a 'charge' Kondo circuit (Science, 2018).
  • Heat Coulomb blockade of one ballistic channel. Coulomb interaction influences heat and electricity profoundly differently, beyond the widespread Wiedemann-Franz law paradigm (Nature Physics, 2018).
  • Controlling charge quantization with quantum fluctuations, in a metallic circuit node (Nature, 2016).
  • Observation of the 'charge' Kondo effect. The Kondo effect, a test-bed for the strongly-correlated electron physics, also applies to the macroscopic quantum degrees of freedom of electrical circuits (Nature, 2015).
  • Measurement of the quantum limit of heat flow across a single electronic channel. Heating drives the transition toward a classical description, but heat transport itself is ruled by quantum mechanics (Science, 2013).
  • Quantum back-action of dissipative circuits on the conductance of an arbitrary electronic channel, a phenomenon with quantum engineering implications for the future of nanoelectronic (Nature Physics, 2011).
  • Out-of-equilibrium spectroscopy of the electronic distribution function in a 1D conductor, the quantum Hall channel (Nature Physics, 2010).

Technical Highlights:

  • 6 mK temperature for the electrons in quantum circuits, a record for small devices (Nature Communications, 2016).
  • Noise is the signal, with a ultra-high resolution on current noise (5 10-32 A2/Hz, current state of the art).

Research Lines:

  1. Many-body quantum physics
  2. Heat quantum transport

List of the team's publications.

FUNDINGS

Project QuTherm (ANR, 2016-2021)

Project QPT (Labex NanoSaclay, 2016-2019)

Project SIM-CIRCUIT (ANR, 2018-2022)

MAIN COLLABORATORS

E. Boulat at Univ Paris Diderot

U. Gennser at C2N (2DEG team)

L. Glazman at Yale (web)

Y. Jin at C2N (NanoFET team)

A. Mitchell at College Dublin (web)

C. Mora at LPA-ENS (web)

I. Safi at LPS-Orsay

P. Simon at LPS-Orsay (web)

E. Sukhorukov at Univ de Geneve