The thesis gives the first experimental demonstration of a new quantum bit (“qubit”) that fuses two promising physical implementations for the storage and manipulation of quantum information – the electromagnetic modes of superconducting circuits, and the spins of electrons trapped in semiconductor quantum dots – and has the potential to inherit beneficial aspects of both. This new qubit consists of the spin of an individual superconducting quasiparticle trapped in a Josephson junction made from a semiconductor nanowire. Due to spin-orbit coupling in the nanowire, the supercurrent flowing through the nanowire depends on the quasiparticle spin state. This thesis shows how to harness this spin-dependent supercurrent to achieve both spin detection and coherent spin manipulation. This thesis also represents a significant advancement to our understanding and control of Andreev levels and thus of superconductivity. Andreev levels, microscopic fermionic modes that exist in all Josephson junctions, are the microscopic origin of the famous Josephson effect, and are also the parent states of Majorana modes in the nanowire junctions investigated in this thesis. The results in this thesis are therefore crucial for the development of Majorana-based topological information processing.
| ISBN: | 9783030838812 |
| Publication date: | 2nd December 2022 |
| Author: | Max Hays |
| Publisher: | Springer Nature Switzerland AG |
| Format: | Paperback |
| Pagination: | 184 pages |
| Series: | Springer Theses |
| Genres: |
Quantum physics (quantum mechanics and quantum field theory) Electronic devices and materials Electronics: circuits and components Mathematical theory of computation |
The thesis gives the first experimental demonstration of a new quantum bit (“qubit”) that fuses two promising physical implementations for the storage and manipulation of quantum information – the electromagnetic modes of superconducting circuits, and the spins of electrons trapped in semiconductor quantum dots – and has the potential to inherit beneficial aspects of both. This new qubit consists of the spin of an individual superconducting quasiparticle trapped in a Josephson junction made from a semiconductor nanowire. Due to spin-orbit coupling in the nanowire, the supercurrent flowing through the nanowire depends on the quasiparticle spin state. This thesis shows how to harness this spin-dependent supercurrent to achieve both spin detection and coherent spin manipulation. This thesis also represents a significant advancement to our understanding and control of Andreev levels and thus of superconductivity. Andreev levels, microscopic fermionic modes that exist in all Josephson junctions, are the microscopic origin of the famous Josephson effect, and are also the parent states of Majorana modes in the nanowire junctions investigated in this thesis. The results in this thesis are therefore crucial for the development of Majorana-based topological information processing.
Realizing an Andreev Spin Qubit features in the following genres: Quantum physics (quantum mechanics and quantum field theory), Electronic devices and materials, Electronics: circuits and components, Mathematical theory of computation
Realizing an Andreev Spin Qubit is available in Paperback, Hardback
Realizing an Andreev Spin Qubit was written by Max Hays and published by Springer Nature Switzerland AG
Realizing an Andreev Spin Qubit has 184 pages
Yes it is part of Springer Theses series
£125.99