Efimov physics from the functional renormalization group

• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Verfasst von: Moroz, Sergej [VerfasserIn]
• Verfasst von: Schmidt, Richard [VerfasserIn]
• Titel: Efimov physics from the functional renormalization group
• Verf.angabe: Stefan Floerchinger, Sergej Moroz, Richard Schmidt
• E-Jahr: 2011
• Jahr: 19 April 2011
• Umfang: 28 S.
• Fussnoten: Special issue: Efimov Physics ; Gesehen am 23.01.2023
• Titel Quelle: Enthalten in: Few-body systems
• Ort Quelle: Wien [u.a.] : Springer, 1986
• Jahr Quelle: 2011
• Band/Heft Quelle: 51(2011), 2/4, special issue vom: Nov., Seite 153-180
• ISSN Quelle: 1432-5411
• DOI: doi:10.1007/s00601-011-0231-z
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Derivative Expansion
• Sach-SW: Feshbach Resonance
• Sach-SW: Renormalization Group
• Sach-SW: Trion
• Sach-SW: Yukawa Coupling
• K10plus-PPN: 1831802635

Abstract

Few-body physics related to the Efimov effect is discussed using the functional renormalization group method. After a short review of renormalization in its modern formulation we apply this formalism to the description of scattering and bound states in few-body systems of identical bosons and distinguishable fermions with two and three components. The Efimov effect leads to a limit cycle in the renormalization group flow. Recently measured three-body loss rates in an ultracold Fermi gas of 6Li atoms are explained within this framework. We also discuss briefly the relation to the many-body physics of the BCS-BEC crossover for two-component fermions and the formation of a trion phase for the case of three species.