Relaxation of an isolated dipolar-interacting Rydberg quantum spin system

• Verfasst von: Piñeiro Orioli, Asier [VerfasserIn]
• Verfasst von: Signoles, Adrien [VerfasserIn]
• Verfasst von: Wildhagen, H [VerfasserIn]
• Verfasst von: Günter, Georg [VerfasserIn]
• Verfasst von: Berges, Jürgen [VerfasserIn]
• Verfasst von: Whitlock, Shannon [VerfasserIn]
• Verfasst von: Weidemüller, Matthias [VerfasserIn]
• Titel: Relaxation of an isolated dipolar-interacting Rydberg quantum spin system
• Verf.angabe: A. Piñeiro Orioli, A. Signoles, H. Wildhagen, G. Günter, J. Berges, S. Whitlock, and M. Weidemüller
• E-Jahr: 2018
• Jahr: 5 February 2018
• Umfang: 7 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 24.03.2020
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2018
• Band/Heft Quelle: 120(2018,6) Artikel-Nummer 063601, Seite 1-7
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.120.063601
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 169317197X

Abstract

How do isolated quantum systems approach an equilibrium state? We experimentally and theoretically address this question for a prototypical spin system formed by ultracold atoms prepared in two Rydberg states with different orbital angular momenta. By coupling these states with a resonant microwave driving, we realize a dipolar XY spin-1/2 model in an external field. Starting from a spin-polarized state, we suddenly switch on the external field and monitor the subsequent many-body dynamics. Our key observation is density dependent relaxation of the total magnetization much faster than typical decoherence rates. To determine the processes governing this relaxation, we employ different theoretical approaches that treat quantum effects on initial conditions and dynamical laws separately. This allows us to identify an intrinsically quantum component to the relaxation attributed to primordial quantum fluctuations.