Superadiabatic driving of a three-level quantum system
We study superadiabatic quantum control of a three-level quantum system whose energy spectrum exhibits multiple avoided crossings. In particular, we investigate the possibility of treating the full control task in terms of independent two-level Landau-Zener problems. We first show that the time prof...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
31 July 2017
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| In: |
Physical review
Year: 2017, Jahrgang: 96, Heft: 1, Pages: 013431 |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.96.013431 |
| Online-Zugang: | Verlag, Pay-per-use, Volltext: http://dx.doi.org/10.1103/PhysRevA.96.013431 Verlag, Pay-per-use, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.96.013431 
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| Verfasserangaben: | M. Theisen, F. Petiziol, S. Carretta, P. Santini, and S. Wimberger |
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| 520 | |a We study superadiabatic quantum control of a three-level quantum system whose energy spectrum exhibits multiple avoided crossings. In particular, we investigate the possibility of treating the full control task in terms of independent two-level Landau-Zener problems. We first show that the time profiles of the elements of the full control Hamiltonian are characterized by peaks centered around the crossing times. These peaks decay algebraically for large times. In principle, such a power-law scaling invalidates the hypothesis of perfect separability. Nonetheless, we address the problem from a pragmatic point of view by studying the fidelity obtained through separate control as a function of the intercrossing separation. This procedure may be a good approach to achieve approximate adiabatic driving of a specific instantaneous eigenstate in realistic implementations. | ||
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