Spin Coherent Manipulation in Josephson Weak Links

Abstract

Novel designs of Josephson weak links based on semiconducting nanowires combined with circuit QED techniques have enabled the resolution of their fine structure due to spin-orbit interactions, opening a path towards Andreev spin qubits. Nevertheless, direct manipulation of the spin within a given Andreev state is in general suppressed compared to inter-doublet manipulation in the absence of Zeeman effects. In addition, noisy spin-flip mechanisms limit any coherent manipulation protocol to spin post-selection. We propose a combination of a spin polarization protocol analogous to sideband cooling with stimulated Raman adiabatic passage specifically tailored for these systems. We show this approach is robust for a large range of design parameters, including the currently rather stringent coherence times.

arXiv comment10 pages, 6 figures

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Cited by in corpus (9)

• Coherent manipulation of an Andreev spin qubit
• Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads
• Yu-Shiba-Rusinov qubit
• Microwave spectroscopy of Andreev states in InAs nanowire-based hybrid junctions using a flip-chip layout
• Blueprint for all-to-all connected superconducting spin qubits
• Opportunities for the direct manipulation of a phase-driven Andreev spin qubit
• Solution of master equations by fermionic-duality: Time-dependent charge and heat currents through an interacting quantum dot proximized by a superconductor
• Spin-resolved nonlocal transport in proximitized Rashba nanowires
• Fermionic Quantum Simulation on Andreev Bound State Superlattices