[institut] SCL Seminar: Denis V. Makarov, Friday, 11 August, 14:00

[Ivana Vasic]

Dear colleagues,

You are cordially invited to the SCL seminar of the Center for the Study 
of Complex Systems, which will be held on Friday, 11 August 2017 at 
14:00 in the library reading room “Dr. Dragan Popović" of the Institute 
of Physics Belgrade. The talk entitled

"Nonlinear dynamics of coherently-coupled two-species Bose-Einstein 
condensates"

will be given by Denis V. Makarov (V. I. Il'ichev Pacific Oceanological 
Institute of the Far-Eastern Branch of the Russian Academy of Sciences, 
Vladivostok, Russia). Abstract of the talk:

Two-component Bose-Einstein condensates with linear inter-component 
coupling have become an object of considerable interest because of their 
nontrivial dynamical properties. In this talk we will address the 
dynamics of a two-species Bose-Einstein condensate where the two species 
correspond to different hyperfine states of the same type of atoms. 
External microwave radiation leads to resonant transitions between the 
states. The condensate is loaded into the optical lattice. We will focus 
our attention on the interplay of spatial and internal dynamics of the 
mixture [1, 2].

We will show that the enhancement of atomic interactions results in 
demixing of the condensates and leads to the formation of immiscible 
solitons, i.e. solitons consisting of only one of the atomic species. 
This process is preceded by a transient regime with highly irregular 
behavior of the mixture. We will demonstrate that the transient regime 
can be associated with dynamical chaos, and that the soliton formation 
is an unpredictable process, i.e. one cannot exactly predict neither the 
spatial location of solitons, nor the species they consist of. In 
addition, our calculations suggest a possibility of spontaneous 
synchronization of Rabi oscillations on neighboring lattice sites. On 
average, number of synchronized sites increases with time.

[1] M. Y. Uleysky, D. V. Makarov, Journal of Russian Laser Research 35, 
138 (2014)
[2] D. V. Makarov, M. Y. Uleysky, Communications in Nonlinear Science 
and Numerical Simulation 43, 227 (2017)

Best regards,
Ivana Vasic
-- 
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/