Spatial non-adiabatic passage using geometric phases

Abstract Quantum technologies based on adiabatic techniques can be highly effective, but often at the cost of being very slow. Here we introduce a set of experimentally realistic, non-adiabatic protocols for spatial state preparation, which yield the same fidelity as their adiabatic counterparts, bu...

Full description

Bibliographic Details
Main Authors: Albert Benseny, Anthony Kiely, Yongping Zhang, Thomas Busch, Andreas Ruschhaupt
Format: Article
Language:English
Published: SpringerOpen 2017-03-01
Series:EPJ Quantum Technology
Subjects:
Online Access:http://link.springer.com/article/10.1140/epjqt/s40507-017-0056-x
id doaj-e8aa1f4cc3944dc48beb514440b84ed5
record_format Article
spelling doaj-e8aa1f4cc3944dc48beb514440b84ed52020-11-24T21:04:33ZengSpringerOpenEPJ Quantum Technology2196-07632017-03-014111510.1140/epjqt/s40507-017-0056-xSpatial non-adiabatic passage using geometric phasesAlbert Benseny0Anthony Kiely1Yongping Zhang2Thomas Busch3Andreas Ruschhaupt4Quantum Systems Unit, Okinawa Institute of Science and Technology Graduate UniversityDepartment of Physics, University College CorkQuantum Systems Unit, Okinawa Institute of Science and Technology Graduate UniversityQuantum Systems Unit, Okinawa Institute of Science and Technology Graduate UniversityDepartment of Physics, University College CorkAbstract Quantum technologies based on adiabatic techniques can be highly effective, but often at the cost of being very slow. Here we introduce a set of experimentally realistic, non-adiabatic protocols for spatial state preparation, which yield the same fidelity as their adiabatic counterparts, but on fast timescales. In particular, we consider a charged particle in a system of three tunnel-coupled quantum wells, where the presence of a magnetic field can induce a geometric phase during the tunnelling processes. We show that this leads to the appearance of complex tunnelling amplitudes and allows for the implementation of spatial non-adiabatic passage. We demonstrate the ability of such a system to transport a particle between two different wells and to generate a delocalised superposition between the three traps with high fidelity in short times.http://link.springer.com/article/10.1140/epjqt/s40507-017-0056-xshortcuts to adiabaticitygeometric phasescomplex tunnelling
collection DOAJ
language English
format Article
sources DOAJ
author Albert Benseny
Anthony Kiely
Yongping Zhang
Thomas Busch
Andreas Ruschhaupt
spellingShingle Albert Benseny
Anthony Kiely
Yongping Zhang
Thomas Busch
Andreas Ruschhaupt
Spatial non-adiabatic passage using geometric phases
EPJ Quantum Technology
shortcuts to adiabaticity
geometric phases
complex tunnelling
author_facet Albert Benseny
Anthony Kiely
Yongping Zhang
Thomas Busch
Andreas Ruschhaupt
author_sort Albert Benseny
title Spatial non-adiabatic passage using geometric phases
title_short Spatial non-adiabatic passage using geometric phases
title_full Spatial non-adiabatic passage using geometric phases
title_fullStr Spatial non-adiabatic passage using geometric phases
title_full_unstemmed Spatial non-adiabatic passage using geometric phases
title_sort spatial non-adiabatic passage using geometric phases
publisher SpringerOpen
series EPJ Quantum Technology
issn 2196-0763
publishDate 2017-03-01
description Abstract Quantum technologies based on adiabatic techniques can be highly effective, but often at the cost of being very slow. Here we introduce a set of experimentally realistic, non-adiabatic protocols for spatial state preparation, which yield the same fidelity as their adiabatic counterparts, but on fast timescales. In particular, we consider a charged particle in a system of three tunnel-coupled quantum wells, where the presence of a magnetic field can induce a geometric phase during the tunnelling processes. We show that this leads to the appearance of complex tunnelling amplitudes and allows for the implementation of spatial non-adiabatic passage. We demonstrate the ability of such a system to transport a particle between two different wells and to generate a delocalised superposition between the three traps with high fidelity in short times.
topic shortcuts to adiabaticity
geometric phases
complex tunnelling
url http://link.springer.com/article/10.1140/epjqt/s40507-017-0056-x
work_keys_str_mv AT albertbenseny spatialnonadiabaticpassageusinggeometricphases
AT anthonykiely spatialnonadiabaticpassageusinggeometricphases
AT yongpingzhang spatialnonadiabaticpassageusinggeometricphases
AT thomasbusch spatialnonadiabaticpassageusinggeometricphases
AT andreasruschhaupt spatialnonadiabaticpassageusinggeometricphases
_version_ 1716770655659098112