Crystal-phase defined nanowire quantum dots as a platform for qubits

Pally, Alessia Prisca. Crystal-phase defined nanowire quantum dots as a platform for qubits. 2024, Doctoral Thesis, University of Basel, Faculty of Science.


Official URL: https://edoc.unibas.ch/96320/

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This thesis aims to study InAs nanowires with built-in crystal-phase defined quantum dots as a platform for quantum computing. We investigate them as a platform for topological qubits, as well as charge and spin qubits. In a first step towards Majorana bound states we investigate the induced superconductivity in a nanowire hybrid device where the superconductor is deposited by standard e-beam evaporation without an epitaxial interface to the nanowire. Using the integrated tunnel barriers as spectrometer, we draw conclusions about the origin of quasiparticle poisoning in our system.
In a second approach we couple a nanowire double quantum dot to a high-impedance resonator. In a first step we will investigate the resonator-nanowire hybrid device as a charge qubit. We observe a very large qubit linewidth. To improve our system, we turn to spin qubits. We take advantage of the intrinsic spin-orbit coupling in our nanowires to couple the resonator to a singlet-triplet qubit, with which we demonstrate strong spin-photon coupling.
Advisors:Schönenberger, Christian
Committee Members:Zumbühl, Dominik M and Riel, Heike
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian
Item Type:Thesis
Thesis Subtype:Doctoral Thesis
Thesis no:15313
Thesis status:Complete
Number of Pages:v, 175
Identification Number:
  • urn: urn:nbn:ch:bel-bau-diss153138
edoc DOI:
Last Modified:29 Mar 2024 05:30
Deposited On:28 Mar 2024 09:51

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