Department of Physics

Indian Institute Of Technology Madras , Chennai

Integrable many-body Landau-Zener model: Coherent conversion between molecular and atomic Bose-Einstein condensates

Speaker : Prof. Rajesh K Malla, Brookhaven National Laboratory, NY, USA

2023-01-09

Abstract :

We discuss a model that describes a stimulated conversion between ultracold bosonic atoms and molecules. The reaction is triggered by a linearly time-dependent transition throughout the Feshbach resonance. The dynamics can be described by a many-body Landau-Zener model. The solution becomes poss ible due to the integrability of the model Hamiltonian.
Our solution predicts a dependence, with a dynamic phase transition, of the reaction efficiency on the transition rate for both atoms-to-molecule pairing and molecular dissociation processes. We find that for the latter process with a linear energy dispersion of atomic modes, the emerging phase can have a thermalized energy distribution of noninteracting bosons with the temperature defined by the rate of the transition. This provides a simple interpretation of the phase transition in terms of the creation of equilibrium Bose-Einstein condensate.

Key Speaker Prof. Rajesh K Malla, Brookhaven National Laboratory, NY, USA
Guests None
Place S N Bose Hall (HSB 210)
Start Time 3:00 PM
Finish Time 4:00 PM
External Link None