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...
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Online Access: | http://link.springer.com/article/10.1140/epjqt/s40507-017-0056-x |
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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 |