ELFT HÍRADÓ

[Andras Palyi <andraspalyi AT caesar.elte.hu>]

Az ELTE Nanofizika Szeminarium jovo hetfoi eloadasa:


Vajna Szabolcs (BME):
Disentangling dynamical phase transitions from equilibrium phase transitions 


Idopont: 2014. februar 17., hetfo, 10:15
Helyszin: ELTE Eszaki Tomb, 5.128-as terem (1117 Budapest, Pazmany Peter 
setany 1/A)


Kivonat:
"Dynamical phase transitions (DPT) occur after quenching some global 
parameters in quantum systems and are signalled by the non-analytical time 
evolution of the dynamical free energy, which is calculated from the 
Loschmidt overlap between the initial and time evolved states. In a recent 
article (M. Heyl et al., Phys. Rev. Lett. 110, 135704 (2013)), it was 
suggested that DPTs are closely related to equilibrium phase transitions 
(EPT) for the transverse field Ising model.
After a general introduction to dynamical phase transitions I show that the 
connection between the DPTs and EPTs is not general. I present examples where 
DPT occurs without crossing any equilibrium critical lines by the quench, and 
a nontrivial example with no DPT but crossing a critical line by the quench."

Minden erdeklodot szivesen latunk.

A szeminarium tovabbi programja: http://wigner.elte.hu/science/?q=seminar

Udvozlettel,
Palyi Andras