Dynamical parity selection in superconducting weak links

Abstract

Excess quasiparticles play a crucial role in superconducting quantum devices ranging from qubits to quantum sensors. In this work we analyze their dynamics for phase-biased finite-length weak links with several Andreev subgap states, where the coupling to a microwave resonator allows for parity state (even/odd) readout. Our theory shows that almost perfect dynamical polarization in a given parity sector is achievable by applying a microwave pulse matching a transition in the opposite parity sector. Our results qualitatively explain key features of recent experiments on hybrid semiconducting nanowire Josephson junctions and provide theoretical guidelines for efficiently controlling the parity state of Andreev qubits.

14 pages, 7 figures, accepted for publication in Phys. Rev. B

References in corpus (8)

• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Andreev spin qubits in multichannel Rashba nanowires
• Signatures of interactions in the Andreev spectrum of nanowire Josephson junctions
• From adiabatic to dispersive readout of quantum circuits
• Microwave response of an Andreev bound state
• Quasiparticle trapping, Andreev level population dynamics, and charge imbalance in superconducting weak links
• Inductive microwave response of Yu-Shiba-Rusinov states
• Strong effects of weak ac driving in short superconducting junctions

Cited by in corpus (13)

• Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
• Dynamical polarization of the fermion parity in a nanowire Josephson junction
• Quantum circuits with multiterminal Josephson-Andreev junctions
• Nonreciprocal charge transport and subharmonic structure in voltage-biased Josephson diodes
• Green's Function Approach to Josephson Dot Dynamics and Application to Quantum Mpemba Effects
• Phase diagram of the disordered Kitaev chain with long range pairing connected to external baths
• Ground state phase diagram and "parity flipping'' microwave transitions in a gate-tunable Josephson Junction
• Microwave Signatures of Topological Superconductivity in Planar Josephson Junctions
• Many-body quantum dynamics of spin-orbit coupled Andreev states in a Zeeman field
• Proposal for a nonadiabatic geometric gate with an Andreev spin qubit
• Fermionic Quantum Simulation on Andreev Bound State Superlattices
• Error threshold in active steering protocols for few-qubit systems
• Effects of electron-electron interaction and spin-orbit coupling on Andreev pair qubits in quantum dot Josephson junctions