| Autor: |
Kanaar DW; Department of Physics, University of Maryland Baltimore County, Baltimore, MD 21250, USA., Güngördü U; Laboratory for Physical Sciences, College Park, MD 20740, USA.; Department of Physics, University of Maryland, College Park, MD 20742, USA., Kestner JP; Department of Physics, University of Maryland Baltimore County, Baltimore, MD 21250, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
Philosophical transactions. Series A, Mathematical, physical, and engineering sciences [Philos Trans A Math Phys Eng Sci] 2022 Dec 26; Vol. 380 (2239), pp. 20210275. Date of Electronic Publication: 2022 Nov 07. |
| DOI: |
10.1098/rsta.2021.0275 |
| Abstrakt: |
In semiconductor spin qubits which typically interact through short-range exchange coupling, shuttling of spin is a practical way to generate quantum operations between distant qubits. Although the exchange is often tunable through voltages applied to gate electrodes, its minimal value can be significantly large, which hinders the applicability of existing shuttling protocols to such devices, requiring a different approach. In this work, we extend our previous results for double- and triple-dot systems, and describe a method for implementing spin state transfer in long chains of singly occupied quantum dots in a non-adiabatic manner. We make use of Cartan decomposition to break down the interacting problem into simpler problems in a systematic way, and use dynamical invariants to design smooth non-adiabatic pulses that can be implemented in devices with modest control bandwidth. Finally, we discuss the extensibility of our results to directed shuttling of spin states on two-dimensional lattices of quantum dots with fixed coupling. This article is part of the theme issue 'Shortcuts to adiabaticity: theoretical, experimental and interdisciplinary perspectives'. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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