25th European Conference on Few-Body Problems in Physics

Session

Monday Parallel Session: Unitary/Boson Systems (AudiMax)

Jul 31, 2023, 2:50 PM

AudiMax (Alte Mensa)

Conveners

Monday Parallel Session: Unitary/Boson Systems (AudiMax)

• Chen Ji (Central China Normal University)

140. Unraveling Universal Correlations: Gaussian Characterization of Systems Near the Unitary Limit

Mario Gattobigio (Université Côte d'Azur - Institut de Physique de Nice)

7/31/23, 2:50 PM

Invited Talk

In this talk, we present a summary of our recent research results on describing systems near the unitary limit using simple potentials, specifically Gaussian potentials[1-5].

In the parameter region where the energy of either the two-particle bound state or the virtual state is small, the physics can be effectively described by the scattering length and the effective range alone. Different...

6. Universality in low-dimensional three-body systems

Prof. Maxim Efremov (German Aerospace Center (DLR), Institute of Quantum Technologies)

7/31/23, 3:15 PM

Contributed Talk

We study a heavy–heavy–light three-body system confined to one or two space dimensions. Both the binding energies and corresponding wave functions are obtained for (i) no heavy-heavy interaction and (ii) a finite-range heavy-light interaction potential. We demonstrate that when the two-body ground-state energy approaches zero, the three-body bound states display a universal behavior,...

112. Unitary interaction geometries in few-body systems

Johannes Kirscher (SRM University AP)

7/31/23, 3:30 PM

Contributed Talk

We present an analysis of systems of up to 5 particles which are characterized by a subset of resonantly interacting pairs. The focus is on the renormalization-group (RG) behaviour of the 3-, 4-, and 5-body, equal-mass ground states. The RG/scaling behaviour is studied as a function of the various possibilities to bind the respective systems with resonant pair interactions.
Based on numerical...

147. Dynamical vortex production and quantum turbulence in perturbed Bose-Einstein condensates

Prof. Lauro Tomio (Instituto de Fisica Teorica, Universidade Estadual Paulista)

7/31/23, 3:45 PM

Contributed Talk

We report investigations on dynamical vortex production and quantum turbulence emerging in periodic perturbed Bose-Einstein condensates, considering binary coupled mass-imbalanced systems, submitted to a stirring time-dependent perturbation. We also present some preliminary results on the case of dipolar single-atom systems under time-dependent periodic Gaussian perturbations.

39. Discrete scale-invariant boson-fermion duality in one dimension

Prof. Satoshi Ohya (Nihon University)

7/31/23, 4:00 PM

Contributed Talk

In this talk, I discuss discrete scale invariance in one-dimensional many-body problems of identical particles. I first classify all possible scale-invariant two-body contact interactions that respect unitarity, Galilean invariance, permutation invariance, and translation invariance in one dimension. By using these contact interactions, I then construct models of $n(\geq3)$ identical particles...