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Freezing of entanglement in alternating transverse field XY model

Debasis SADHUKAN (Harish-Chandra Research Institute — Allahabad, India)
When Jun 22, 2017
from 01:30 PM to 02:30 PM
Where Amphithéâtre Schrödinger
Attendees Debasis SADHUKAN
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Jeudi 22 Juin

 

Title: Freezing of entanglement in alternating transverse field XY model

Debasis SADHUKAN (Harish-Chandra Research Institute — Allahabad, India)

 

Abstract: Inhomogeneity often leads to the generation of new phases in
many-body systems. The one-dimensional quantum XY model in a uniform
transverse field is known to have a quantum phase transition from
antiferromagnetic to paramagnetic phase. Introduction of an
alternating transverse field instead of a uniform one, develops a new
dimer phase in addition to the antiferromagnetic and paramagnetic
phase. I will show that the quantum correlation present in the system
can characterize all the quantum phase transitions present in the
system. I will also talk about the trends of quantum correlations in
such system, under closed and open dynamics. Finally, I will show that
bipartite entanglement can be frozen over time with a proper choice of
the many-body substrate, which is in contact with the environment via
a repetitive interaction.