Qubit gates with simultaneous transport in double quantum dots

A single electron spin in a double quantum dot in a magnetic field is considered in terms of a four-level system. By describing the electron motion between the potential minima via spin-conserving tunneling and spin flip caused by a spin-orbit coupling, we inversely engineer faster-than-adiabatic st...

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Bibliographic Details
Published in:New journal of physics 2018-11, Vol.20 (11), p.113029
Main Authors: Li, Yi-Chao, Chen, Xi, Muga, J G, Sherman, E Ya
Format: Article
Language:English
Subjects:
coupled quantum dots
Electron spin
Electrons
inverse engineering
Physics
Quantum dots
Qubits (quantum computing)
Single electrons
spin-orbit coupling effect
Spin-orbit interactions
Transport
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Summary:A single electron spin in a double quantum dot in a magnetic field is considered in terms of a four-level system. By describing the electron motion between the potential minima via spin-conserving tunneling and spin flip caused by a spin-orbit coupling, we inversely engineer faster-than-adiabatic state manipulation operations based on the geometry of four-dimensional rotations. In particular, we show how to transport a qubit among the quantum dots performing simultaneously required spin rotations.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/aaedd9