DPG Phi
Verhandlungen
Verhandlungen
DPG

Erlangen 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 33: Quantum Gases

Q 33.5: Vortrag

Mittwoch, 16. März 2022, 15:00–15:15, Q-H10

From heteronuclear Efimov effect to Fermi polarons - (quasi-) bound states and induced scattering properties — •Michael Rautenberg1, Binh Tran1, Tilman Enss2, Manuel Gerken1, Eleonora Lippi1, Bing Zhu1,3, Juris Ulmanis1, Moritz Drescher2, Manfred Salmhofer2, and Matthias Weidemüller11Physikalisches Institut, Ruprecht Karl University of Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Institut for Theoretical Physics, Ruprecht Karl University of Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany — 3Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China

We report on the results of our theoretical investigation of two heavy bosons immersed in a Fermi sea of light fermions. Using the Born-Oppenheimer approximation - allowing an effective few-particle description of this quantum many-body problem - both the bound state spectrum as well as fermion-induced scattering properties of the bosons are investigated. The bound state spectrum is discussed as a function of inter- and intraspecies interactions as well as the fermion density, also including the zero density limit where the system recovers the three-body Efimov spectrum. Numerical calculations of potentials and spectra are performed for the mass ratio of a 6Li-133Cs mixture.

Additionally, we find resonances in the induced boson-boson scattering length at the positions where the in-medium Efimov bound states cross the continuum threshold. For sufficiently large impurity-bath mass ratio, quasibound states can be observed.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2022 > Erlangen