Microwave Signatures of Topological Superconductivity in Planar Josephson Junctions

Abstract

Planar Josephson junctions provide a platform to host topological superconductivity which, through manipulating Majorana bound states (MBS), could enable fault-tolerant quantum computing. However, what constitutes experimental signatures of topological superconductivity and how MBS can be detected remains strongly debated. In addition to spurious effects that mimic MBS, there is a challenge to discern the inherent topological signals in realistic systems with many topologically-trivial Andreev bound states, determining the transport properties of Josephson junctions. Guided by the advances in microwave spectroscopy, we theoretically study Al/InAs-based planar Josephson junction embedded into a radio-frequency superconducting quantum interference device to identify microwave signatures of topological superconductivity. Remarkably, by exploring the closing and reopening of a topological gap, we show that even in a wide planar Josephson junction with many Andreev bound states, such a topological signature is distinguishable in the resonance frequency shift of a microwave drive and the ``half-slope'' feature of the microwave absorption spectrum. Our findings provide an important step towards experimental detection of non-Abelian statistics and implementing scalable topological quantum computing.

References in corpus (34)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Circuit Quantum Electrodynamics
• A Josephson junction supercurrent diode
• Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
• Coherent manipulation of an Andreev spin qubit
• Non-Majorana states yield nearly quantized conductance in superconductor-semiconductor nanowire devices
• Disorder-induced zero-bias peaks in Majorana nanowires
• Cubic spin-orbit coupling and anomalous Josephson effect in planar junctions
• Spin-orbit induced chirality of Andreev states in Josephson junctions
• Missing Shapiro steps in topologically trivial Josephson Junction on InAs quantum well
• Fusion of Majorana Bound States with Mini-Gate Control in Two-Dimensional Systems
• Majorana bound states in semiconducting nanostructures
• Signatures of interactions in the Andreev spectrum of nanowire Josephson junctions
• Signatures of a topological phase transition in a planar Josephson junction
• Superconducting Diode Effect Sign Change in Epitaxial Al-InAs Josepshon Junctions
• From adiabatic to dispersive readout of quantum circuits
• Gate-tunable, superconductor-semiconductor parametric amplifier
• Anisotropic topological superconductivity in Josephson junctions
• Full proximity treatment of topological superconductors in Josephson-junction architectures
• Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
• Theory of microwave spectroscopy of Andreev bound states with a Josephson junction
• Planar Josephson junctions in germanium: Effect of cubic spin-orbit interaction
• Microwave spectroscopy of interacting Andreev spins
• Evidence of Andreev blockade in a double quantum dot coupled to a superconductor
• Tunable planar Josephson junctions driven by time-dependent spin-orbit coupling
• Dynamical parity selection in superconducting weak links
• Evolution of $4\pi$-periodic Supercurrent in the Presence of In-plane Magnetic Field
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Microwave Sensing of Andreev Bound States in a Gate-Defined Superconducting Quantum Point Contact
• Beyond the standard model of topological Josephson junctions: From crystalline anisotropy to finite-size and diode effects
• Quantum-critical dynamics of a Josephson junction at the topological transition

Cited by in corpus (4)

• Detection of Majorana zero modes bound to Josephson vortices in planar superconductor-topological insulator-superconductor junctions
• Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction
• Multiple Majorana bound states and their resilience against disorder in planar Josephson junctions
• Majorana edge and end states in planar Josephson junctions