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Dynamical quantum phase transitions in the Kitaev honeycomb model
Artikel
Schmitt, Markus und Kehrein, Stefan (2015) Dynamical quantum phase transitions in the Kitaev honeycomb model. Phys. Rev. B 92, 075114.DOI zum Zitieren dieses Dokuments: 10.5283/epub.81049
Zusammenfassung
The notion of a dynamical quantum phase transition (DQPT) was recently introduced [Heyl et al., Phys. Rev. Lett. 110, 135704 (2013)] as the nonanalytic behavior of the Loschmidt echo at critical times in the thermodynamic limit. In this work the quench dynamics in the ground state sector of the two-dimensional Kitaev honeycomb model is studied regarding the occurrence of DQPTs. For general ...
The notion of a dynamical quantum phase transition (DQPT) was recently introduced [Heyl et al., Phys. Rev. Lett. 110, 135704 (2013)] as the nonanalytic behavior of the Loschmidt echo at critical times in the thermodynamic limit. In this work the quench dynamics in the ground state sector of the two-dimensional Kitaev honeycomb model is studied regarding the occurrence of DQPTs. For general two-dimensional systems of BCS type it is demonstrated how the zeros of the Loschmidt echo coalesce to areas in the thermodynamic limit, implying that DQPTs occur as discontinuities in the second derivative. In the Kitaev honeycomb model DQPTs appear after quenches across a phase boundary or within the massless phase. In the 1d limit of the Kitaev honeycomb model it becomes clear that the discontinuity in the higher derivative is intimately related to the higher dimensionality of the nondegenerate model. Moreover, there is a strong connection between the stationary value of the rate function of the Loschmidt echo after long times and the occurrence of DQPTs in this model.
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| Dokumentenart | Artikel | ||||
| Titel eines Journals oder einer Zeitschrift | Phys. Rev. B | ||||
| Verlag | American Physical Society | ||||
| Band | 92 | ||||
| Seitenbereich | 075114 | ||||
| Datum | 10 August 2015 | ||||
| Veröffentlichungsdatum | 28 Okt 2026 10:18 | ||||
| Institutionen | Nicht ausgewählt | ||||
| Identifikationsnummer |
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| Dewey-Dezimal-Klassifikation | 500 Naturwissenschaften und Mathematik > 530 Physik | ||||
| Status | Veröffentlicht | ||||
| Begutachtet | Ja, diese Version wurde begutachtet | ||||
| An der Universität Regensburg entstanden | Nein | ||||
| URN der UB Regensburg | urn:nbn:de:bvb:355-epub-810497 | ||||
| Dokumenten-ID | 81049 |
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