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NEWS

Dr Sandro Wimberger

ITP, Heidelberg University, Germany

Friday, September 20th, 2013 at 12:00:00 PM

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 04:25:11 PM on Wednesday, September 18th, 2013

Many-body dynamics of ultracold atoms in dissipative optical lattices

Modern quantum and atom-optical experiments allow for an unprecedented control of microscopic degrees of freedom, not just in the initialization but also in th

Modern quantum and atom-optical experiments allow for an unprecedented control of microscopic degrees of freedom, not just in the initialization but  also in the coherent and incoherent evolution of  quantum states. We focus on the dynamics of  ultra-cold bosons in an optical lattice with controlled and localized dissipation [1-4]. For suitable initial states, strong dissipation can stabilize a Bose-Einstein condensate, such that it remains  coherent   even  in   the  presence   of   strong   interactions  between  its constituents.  Using an exact unraveling of  the underlying master  equation for small systems and  a semiclassical  approach  for  large ones, we  predict,  in particular,  the formation  of  stable  and  coherent  macroscopic  quantum  states in  the  leaky  lattice [3,4].

References

[1]  D. Witthaut, F. Trimborn, and S. Wimberger, PRL 101, 200402 (2008)

[2]  D. Witthaut, F. Trimborn, H. Hennig,  G. Kordas, T. Geisel, and S.  Wimberger,

PRA 83, 063608 (2011)

[3]  G. Kordas, S. Wimberger, and D. Witthaut, EPL 100, 30007 (2012)

[4]  G. Kordas, S. Wimberger, and D. Witthaut, PRA 87, 043618 (2013)

For further informations, please contact Prof. Giovanni Modugno.