Direct Transport between Superconducting Subgap States in a Double Quantum Dot

Abstract

We demonstrate direct transport between two opposing sets of Yu-Shiba-Rusinov (YSR) subgap states realized in a double quantum dot. This sub-gap transport relies on intrinsic quasiparticle relaxation, but the tunability of the device allows us to explore also an additional relaxation mechanism based on charge transferring Andreev reflections. The transition between these two relaxation regimes is identified in the experiment as a marked gate-induced stepwise change in conductance. We present a transport calculation, including YSR bound states and multiple Andreev reflections alongside with quasiparticle relaxation, due to a weak tunnel coupling to a nearby normal metal, and obtain excellent agreement with the data.

References in corpus (32)

• A short introduction to the Lindblad Master Equation
• Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
• Hamiltonian approach to the transport properties of superconducting quantum point contacts
• From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
• Scaling of Majorana Zero-Bias Conductance Peaks
• AC JOSEPHSON EFFECT IN A SINGLE QUANTUM CHANNEL
• A Semiconductor Nanowire-Based Superconducting Qubit
• Revealing the electronic structure of a carbon nanotube carrying a supercurrent
• Coherent manipulation of Andreev states in superconducting atomic contacts
• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Coherent manipulation of an Andreev spin qubit
• Spectral properties of locally correlated electrons in a BCS superconductor
• Spin-orbit splitting of Andreev states revealed by microwave spectroscopy
• Direct microwave measurement of Andreev-bound-state dynamics in a proximitized semiconducting nanowire
• Tunneling processes into localized subgap states in superconductors
• Evidence for long-lived quasiparticles trapped in superconducting point contacts
• Tuning Yu-Shiba-Rusinov States in a Quantum Dot
• Andreev Molecules in Semiconductor Nanowire Double Quantum Dots
• Dynamics of quasiparticle trapping in Andreev levels
• Temperature dependence of Andreev spectra in a superconducting carbon nanotube quantum dot
• Supercurrent in a double quantum dot
• Tunneling dynamics between superconducting bound states at the atomic limit
• Perturbation theory of a superconducting $0-\pi$ impurity quantum phase transition
• Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots
• Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor ${\mathrm{FeTe}}_{0.55}{\mathrm{Se}}_{0.45}$
• Triplet-blockaded Josephson supercurrent in double quantum dots
• Mirage Andreev spectra generated by mesoscopic leads in nanowire quantum dots
• Interplay Between Yu-Shiba-Rusinov States and Multiple Andreev Reflections
• Non-equilibrium theory of tunneling into localized state in superconductor
• Tunneling processes between Yu-Shiba-Rusinov bound states
• Zeeman-driven parity transitions in an Andreev quantum dot
• Active quasiparticle suppression in a non-equilibrium superconductor

Cited by in corpus (13)

• Generalized atomic limit of a double quantum dot coupled to superconducting leads
• Surrogate model solver for impurity-induced superconducting subgap states
• Charge sensing the parity of an Andreev molecule
• Intermediate states in Andreev bound state fusion
• Full Counting Statistics of Yu-Shiba-Rusinov Bound States
• Richardson model with complex level structure and spin-orbit coupling for hybrid superconducting islands: stepwise suppression of pairing and magnetic pinning
• YSR Bond Qubit in a Double Quantum Dot with cQED Operation
• Characterizing local Majorana properties using Andreev states
• Scalable Effective Models for Superconducting Nanostructures: Applications to Double, Triple, and Quadruple Quantum Dots
• DC Josephson effect between two Yu-Shiba-Rusinov bound states
• Quantum phase transition in a double quantum dot Josephson junction driven by electron-electron interactions
• Magnetic flux controlled current phase relationship in double Quantum Dot Josephson junction
• Optimal Majoranas in Mesoscopic Kitaev Chains