Observation of universal dynamics in an isolated one-dimensional Bose gas far from equilibrium

• Verfasst von: Erne, Sebastian [VerfasserIn]
• Verfasst von: Gasenzer, Thomas [VerfasserIn]
• Verfasst von: Berges, Jürgen [VerfasserIn]
• Titel: Observation of universal dynamics in an isolated one-dimensional Bose gas far from equilibrium
• Verf.angabe: Sebastian Erne, Robert Bücker, Thomas Gasenzer, Jürgen Berges, and Jörg Schmiedmayer
• E-Jahr: 2018
• Jahr: 31 May 2018
• Umfang: 6 S.
• Fussnoten: Gesehen am 06.11.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1805.12310, 12 Seiten
• DOI: doi:10.1038/s41586-018-0667-0
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Condensed Matter - Quantum Gases
• Sach-SW: Condensed Matter - Statistical Mechanics
• Sach-SW: Quantum Physics
• K10plus-PPN: 1584835826

Abstract

We provide experimental evidence of universal dynamics far from equilibrium during the relaxation of an isolated one-dimensional Bose gas. Following a rapid cooling quench, the system exhibits universal scaling in time and space, associated with the approach of a non-thermal fixed point. The time evolution within the scaling period is described by a single universal function and scaling exponent, independent of the specifics of the initial state. Our results provide a quantum simulation in a regime, where to date no theoretical predictions are available. This constitutes a crucial step in the verification of universality far from equilibrium. If successful, this may lead to a comprehensive classification of systems based on their universal properties far from equilibrium, relevant for a large variety of systems at different scales.