[seminar] Today: Berislav Buča: Current statistics of open parity-symmetric spin systems

[Damir Pajic]

Podsjetnik na današnji seminar./Reminder for seminar today.

Drage kolegice i kolege,
Drago mi je da mogu najaviti sljedeć‡i Seminar Fizičkog odsjeka i ZCI 
QuantiXLie:

Dear colleagues,
I would like to invite you to the following Seminar of the Department of 
Physics and ZCI QuantiXLie:

utorak/Tuesday  11.07.2017. u 14:15 h
room F201 (floor II)

Berislav Buča

Department of Medical Physics and Biophysics,
University of Split School of Medicine, Šoltanska 2, 21000 Split, Croatia

In the introduction we discuss non-equilibrium quantum physics of 
systems weakly coupled to their environments, and discuss the Lindblad 
equation. We then study the full current statistics for interacting 
quantum many-body spin systems weakly coupled to the environment. In the 
leading order in the system-bath coupling we derive exact spin current 
statistics for a large class of parity symmetric spin-1/2 systems driven 
by one or more pairs of Markovian baths with local Lindblad coupling 
operators. Interestingly, in this class of systems the leading order 
current statistics are universal in the leading order, and do not depend 
on details of the system. Furthermore, in the specific cases of 
anisotropic Heisenberg (XXZ) spin 1/2 chain and the Hubbard model we 
derive explicitly the next-to-leading order to the current statistics 
using Bethe ansatz techniques.

References:
M. Esposito, U. Harbola, and S. Mukamel, Rev. Mod. Phys. *81*, 1665 (2009).
B. Buča and T. Prosen, Phys. Rev. Lett. *112*, 067201(2014).
B. Buča and T. Prosen, Phys. Rev. E *95*, 052141 (2017).


Lijep pozdrav / Best regards
Damir Pajić