Observation of the frozen charge of a Kondo resonance

Abstract

The ability to control electronic states at the nanoscale has contributed to our modern understanding of condensed matter. In particular, quantum dot circuits represent model systems for the study of strong electronic correlations, epitomized by the Kondo effect. Here, we show that circuit Quantum Electrodynamics architectures can be used to study the internal degrees of freedom of such a many-body phenomenon. We couple a quantum dot to a high finesse microwave cavity to measure with an unprecedented sensitivity the dot electronic compressibility i.e. the ability of the dot to accommodate charges. Because it corresponds solely to the charge response of the electronic system, this quantity is not equivalent to the conductance which involves in general other degrees of freedom such as spin. By performing dual conductance/compressibility measurements in the Kondo regime, we uncover directly the charge dynamics of this peculiar mechanism of electron transfer. Strikingly, the Kondo resonance, visible in transport measurements, is transparent to microwave photons trapped in the high finesse cavity. This reveals that, in such a many body resonance, finite conduction is achieved from a charge frozen by Coulomb interaction. This previously elusive freezing of charge dynamics is in stark contrast with the physics of a free electron gas. Our setup highlights the power of circuit quantum electrodynamics architectures to study condensed matter problems. The tools of cavity quantum electrodynamics could be used in other types of mesoscopic circuits with many-body correlations and bring a promising platform to perform quantum simulation of fermion-boson problems.

arXiv commentminor differences with published version

References in corpus (22)

• Kondo Physics in a Single Electron Transistor
• Kondo physics in carbon nanotubes
• Circuit Quantum Electrodynamics with a Spin Qubit
• Transport Coefficients of the Anderson Model via the Numerical Renormalization Group
• Quantum transport in carbon nanotubes
• Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
• Dipole coupling of a double quantum dot to a microwave resonator
• Violation of Kirchhoff's Laws for a Coherent RC Circuit
• Quantum phase transition in a single-molecule quantum dot
• Energy resolution and discretization artefacts in the numerical renormalization group
• Generalized Numerical Renormalization Group for Dynamical Quantities
• Coherent coupling of a single spin to microwave cavity photons
• Coupling a quantum dot, fermionic leads and a microwave cavity on-chip
• Two-channel Kondo effect and renormalization flow with macroscopic quantum charge states
• Universal Fermi liquid crossover and quantum criticality in a mesoscopic device
• Quantum dot admittance probed at microwave frequencies with an on-chip resonator
• Giant Charge Relaxation Resistance in the Anderson Model
• Many-body Correlation Effect on Mesoscopic Charge Relaxation
• Stamping single wall nanotubes for circuit quantum electrodynamics
• Measurements of flux dependent screening in Aharonov-Bohm rings
• Transport Coefficients of the Anderson Model
• Electron-photon coupling in Mesoscopic Quantum Electrodynamics

Cited by in corpus (28)

• Semiconductor Spin Qubits
• Superconductor-semiconductor hybrid cavity quantum electrodynamics
• Probing quantum devices with radio-frequency reflectometry
• Spectroscopy of Wigner molecules on superfluid helium using a superconducting resonator
• Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena
• Non-equilibrium quantum impurity problems via matrix-product states in the temporal domain
• Solving quantum impurity problems in and out of equilibrium with variational approach
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Variational principle for quantum impurity systems in and out of equilibrium: application to Kondo problems
• Power law tails and non Markovian dynamics in open quantum systems: An exact solution from Keldysh field theory
• Nanomechanical characterization of the Kondo charge dynamics in a carbon nanotube
• Observing the universal screening of a Kondo impurity
• Fabry-Pérot oscillations in correlated carbon nanotubes
• Non-linear charge and energy dynamics of an adiabatically driven interacting quantum dot
• Theory of interactions between cavity photons induced by a mesoscopic circuit
• Scaling laws of the Kondo problem at finite frequency
• Kondo QED: The Kondo effect and photon trapping in a two-impurity Anderson model ultra-strongly coupled to light
• Non-Markovian transient spectroscopy in cavity QED
• Phase-Coherent Dynamics of Quantum Devices With Local Interactions
• Quartz tuning-fork based carbon nanotube transfer into quantum device geometries
• Kondo induced π-phase shift of microwave photons in a circuit quantum electrodynamics architecture
• Conductance of a Dissipative Quantum Dot: Nonequilibrium Crossover Near a Non-Fermi-Liquid Quantum Critical Point
• Staggered spin-orbit interaction in a nanoscale device
• Nonequilibrium transport through an interacting monitored quantum dot
• Optomechanical coupling and damping of a carbon nanotube quantum dot
• Parametric Drive of a Double Quantum Dot in a Cavity
• Non-symmetrized quantum noise in a Kondo quantum dot
• Probing Kondo spin fluctuations with scanning tunneling microscopy and electron spin resonance