Opportunities for the direct manipulation of a phase-driven Andreev spin qubit
Yoan Fauvel, Julia S. Meyer, Manuel Houzet
DOI 10.1103/PhysRevB.109.184515 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
In a Josephson junction, the transfer of Cooper pairs from one superconductor to the other one can be associated with the formation of Andreev bound states. In a Josephson junction made with a semiconducting nanowire, the spin degeneracy of these Andreev states can be broken thanks to the presence of spin-orbit coupling and a finite phase difference between the two superconducting electrodes. The lifting of the spin degeneracy opened the way to the realization of Andreev spin qubits that do not require the application of a large magnetic field. So far the operation of these qubits relied on a Raman process involving two microwave tones and a third Andreev state [M. Hays et al., Science 373, 430 (2021)]. Still, time-reversal preserving impurities in the nanowire allow for spin-flip scattering processes. Here, using the formalism of scattering matrices, we show that these processes generically couple Andreev states with opposite spins. In particular, the nonvanishing current matrix element between them allows for the direct manipulation of phase-driven Andreev spin qubits, thereby circumventing the use of the above-mentioned Raman process.
Similar papers
Manipulation with Andreev states in spin active mesoscopic Josephson junctions
similarity 0.90J. Michelsen et al.
Source status unknown — claims are unverified
Manipulation with Andreev states in spin active mesoscopic Josephson junctions
similarity 0.89J. Michelsen et al. · 2007 · arXiv:0710.0320
Source status unknown — claims are unverified
Proposal for a nonadiabatic geometric gate with an Andreev spin qubit
similarity 0.89Mostafa Tanhayi Ahari & Yaroslav Tserkovnyak
Source status unknown — claims are unverified
Coherent manipulation of an Andreev spin qubit
similarity 0.89M. Hays et al. · 2021 · arXiv:2101.06701
Source status unknown — claims are unverified
Direct Microwave Measurement of Andreev-Bound-State Dynamics in a Semiconductor-Nanowire Josephson Junction
similarity 0.88M. Hays et al.
Source status unknown — claims are unverified
Josephson current through a superconductor/semiconductor-nanowire/superconductor junction: Effects of strong spin-orbit coupling and Zeeman splitting
similarity 0.88Meng Cheng & Roman M. Lutchyn
Source status unknown — claims are unverified