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A holographic perspective on phonons and pseudo-phonons
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-170882
- We analyze the concomitant spontaneous breaking of translation and conformal symmetries by introducing in a CFT a complex scalar operator that acquires a spatially dependent expectation value. The model, inspired by the holographic Q-lattice, provides a privileged setup to study the emergence of phonons from a spontaneous translational symmetry breaking in a conformal field theory and offers valuable hints for the treatment of phonons in QFT at large. We first analyze the Ward identity structure by means of standard QFT techniques, consideringWe analyze the concomitant spontaneous breaking of translation and conformal symmetries by introducing in a CFT a complex scalar operator that acquires a spatially dependent expectation value. The model, inspired by the holographic Q-lattice, provides a privileged setup to study the emergence of phonons from a spontaneous translational symmetry breaking in a conformal field theory and offers valuable hints for the treatment of phonons in QFT at large. We first analyze the Ward identity structure by means of standard QFT techniques, considering both spontaneous and explicit symmetry breaking. Next, by implementing holographic renormalization, we show that the same set of Ward identities holds in the holographic Q-lattice. Eventually, relying on the holographic and QFT results, we study the correlators realizing the symmetry breaking pattern and how they encode information about the low-energy spectrum.…
Autor(en): | Andrea Amoretti, Daniel Areán, Riccardo Argurio, Daniele Musso, Leopoldo A. Pando Zayas |
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URN: | urn:nbn:de:bvb:20-opus-170882 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Journal of High Energy Physics |
Erscheinungsjahr: | 2017 |
Band / Jahrgang: | 5 |
Heft / Ausgabe: | 51 |
Originalveröffentlichung / Quelle: | Journal of High Energy Physics 05(2017)051. DOI: 10.1007/JHEP05(2017)051 |
DOI: | https://doi.org/10.1007/JHEP05(2017)051 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Freie Schlagwort(e): | AdS-CFT correspondence; effective field theories; holography and condensed matter physics (AdS/CMT) |
Datum der Freischaltung: | 14.10.2019 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |