Out-of-equilibrium phase diagram of long-range superconductors

• Verfasst von: Uhrich, Philipp [VerfasserIn]
• Verfasst von: Defenu, Nicolò [VerfasserIn]
• Verfasst von: Jafari, Rouhollah [VerfasserIn]
• Verfasst von: Halimeh, Jad C. [VerfasserIn]
• Titel: Out-of-equilibrium phase diagram of long-range superconductors
• Verf.angabe: Philipp Uhrich, Nicolo Defenu, Rouhollah Jafari, and Jad C. Halimeh
• E-Jahr: 2020
• Jahr: 19 June 2020
• Umfang: 15 S.
• Fussnoten: Gesehen am 21.06.2021
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2020
• Band/Heft Quelle: 101(2020), 24, Artikel-ID 245148, Seite 1-15
• ISSN Quelle: 2469-9969
• DOI: doi:10.1103/PhysRevB.101.245148
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: quantum
• Sach-SW: renormalization-group
• K10plus-PPN: 1760920541

Abstract

Within the ultimate goal of classifying universality in quantum many-body dynamics, understanding the relation between out-of-equilibrium and equilibrium criticality is a crucial objective. Models with power-law interactions exhibit rich well-understood critical behavior in equilibrium, but the out-of-equilibrium picture has remained incomplete, despite recent experimental progress. We construct the rich dynamical phase diagram of free-fermionic chains with power-law hopping and pairing and provide analytic and numerical evidence showing a direct connection between nonanalyticities of the return rate and zero crossings of the string order parameter. Our results may explain the experimental observation of so-called accidental dynamical vortices, which appear for quenches within the same topological phase of the Haldane model, as reported by Flaschner et al. [Nat. Phys. 14, 265 (2018)]. Our work is readily applicable to modern ultracold-atom experiments, not least because state-of-the-art quantum gas microscopes can now reliably measure the string order parameter, which, as we show, can serve as an indicator of dynamical criticality.