Scaling laws of the Kondo problem at finite frequency

Abstract

Driving a quantum system at finite frequency allows one to explore its dynamics. This has become a well mastered resource for controlling the quantum state of two level systems in the context of quantum information processing. However, this can also be of fundamental interest, especially with many-body systems which display an intricate finite frequency behavior. In condensed matter, the Kondo effect epitomizes strong electronic correlations, but the study of its dynamics and the related scaling laws has remained elusive so far. Here, we fill this gap by studying a carbon nanotube based Kondo quantum dot driven by a microwave signal. Our findings not only confirm long-standing theoretical predictions, but also allow us to establish a simple ansatz for the scaling laws on the Kondo problem at finite frequency. More generally, our technique opens a new path for understanding the dynamics of complex quantum dot circuits in the context of quantum simulation of strongly correlated electron fluids.

References in corpus (21)

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• Electron transport through double quantum dots
• The Kondo Effect in the Unitary Limit
• Kondo physics in carbon nanotubes
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• Kondo effect in AC transport through Quantum dots
• Nonlinear Response of a Kondo system: Direct and Alternating Tunneling Currents
• Observation of the frozen charge of a Kondo resonance
• Stamping single wall nanotubes for circuit quantum electrodynamics
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Cited by in corpus (5)

• Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena
• Phase-Coherent Dynamics of Quantum Devices With Local Interactions
• Kondo induced π-phase shift of microwave photons in a circuit quantum electrodynamics architecture
• Floquet Renormalization Group Approach to the Periodically Driven Kondo Model
• Many-body correlations in Floquet steady-states: Frequency-resolved renormalization group of the driven Anderson impurity