CMSP Seminar @ICTP Stasi Room: Amit DUTTA on Friday 7 July at 14.00

[Condensed Matter Section]

Condensed Matter & Statistical Physics Seminar
----------------------------------------------------------------

Friday 7 July at 14:00 hrs - Stasi Seminar Room

Speaker: Amit DUTTA  (ITT, Dept. of Physics, KanpurIndia)

"Dynamics of the Haldane Model Following A Quench: Non-analyticities and
Emergent Topology"

Abstract: Thermalization of a closed quantum system is a problem of 
immense interest. In this talk, we shall, however, focus on the early 
time dynamics of a closed quantum system evolving with the time 
independent final Hamiltonian following a quench. The purpose is to 
probe the emerging non-analyticities at different instants of time 
referred to as so called "dynamical quantum phase transitions (DQPTs)". 
These non-analyticties are manifested in the Loschmidt echo and can be 
connected to the the lines (or areas) of "Fisher zeros" in the complex 
time plane. Furthermore, these are reflected in a dynamical topological 
order parameter constructed out of the gauge-independent Pancharatnam 
phase implying an emerging topological structure. With a brief note on 
the one-dimensional models, we shall illustrate the above scenario using 
the topological Haldane model on a hexagonal lattice. We shall 
illustrate the non-trivial role played by the Haldane mass term (which 
determines the topology of the equilibrium Haldane model) and also 
propose the topological index associated with the corresponding DQPTs.

All are welcome to attend.
http://indico.ictp.it/event/8262/