Detection of avoided crossings by fidelity
The fidelity, defined as overlap of eigenstates of two slightly different Hamiltonians, is proposed as an efficient detector of avoided crossings in the energy spectrum. This new application of fidelity is motivated for model systems, and its value for analyzing complex quantum spectra is underlined...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2011
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| In: |
Physica. A, Statistical mechanics and its applications
Year: 2011, Jahrgang: 390, Heft: 7, Pages: 1363-1369 |
| ISSN: | 1873-2119 |
| DOI: | 10.1016/j.physa.2010.12.017 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physa.2010.12.017 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0378437110010496 
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| Verfasserangaben: | Patrick Plötz, Michael Lubasch, Sandro Wimberger |
| Zusammenfassung: | The fidelity, defined as overlap of eigenstates of two slightly different Hamiltonians, is proposed as an efficient detector of avoided crossings in the energy spectrum. This new application of fidelity is motivated for model systems, and its value for analyzing complex quantum spectra is underlined by applying it to a random matrix model and a tilted Bose-Hubbard system. |
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| Beschreibung: | Available online 22 December 2010 Gesehen am 23.12.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1873-2119 |
| DOI: | 10.1016/j.physa.2010.12.017 |