Generalized fidelity susceptibility at phase transitions

In the present work, we investigate the intrinsic relation between quantum fidelity susceptibility (QFS) and the dynamical structure factor. We give a concise proof of the QFS beyond the perturbation theory. With the QFS in the Lehmann representation, we point out that the QFS is actually the negati...

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Veröffentlicht in:	Journal of physics. Condensed matter 2015-05, Vol.27 (20), p.205601-205601
Hauptverfasser:	You, Wen-Long, He, Li
Format:	Artikel
Sprache:	eng
Schlagworte:	dynamical structure factor generalized fidelity susceptibility quantum phase transition
Online-Zugang:	Volltext
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