ELFT HÍRADÓ

[Andras Palyi <palyi AT mail.bme.hu>]

Dear Colleagues, 

The Exotic Quantum Phases seminar series at BME continues next Monday with 
this talk:


Ferenc Igloi (MTA Wigner RCP) 
“Quantum relaxation and metastability of lattice bosons with cavity-induced 
long-range interactions”

Time: 14:15 on Monday (April 1, 2019)
Location: library of the theory department (BME Department of Theoretical 
Physics, Budafoki ut 8., building F, stairway III.)

Abstract: 
"The coupling of cold atoms to the radiation field within a high-finesse 
optical resonator, an optical
cavity, induces long-range interactions which can compete with an underlying 
optical lattice. The
interplay between short- and long-range interactions gives rise to new phases 
of matter, including
supersolidity and density waves, and interesting quantum dynamics.

In this talk it is shown that for hard-core bosons in one dimension the 
ground state phase diagram and
the quantum relaxation after sudden quenches can be calculated exactly in the 
thermodynamic limit.
Remanent density-wave order is observed for quenches from a density-wave 
ground state into the
superfluid phase below a dynamical transition line. After sufficiently strong 
superfluid to density wave
quenches beyond a static metastability line density-wave order emerges on top 
of remanent
superfluid order, giving rise to a dynamically generated supersolid state. 
Our method to handle
infinite- and short-range interactions in the infinite system size limit 
opens a way to solve exactly
other Hamiltonians with infinite- and short range interactions as well.

[1] B. Blass, H. Rieger, G. Roósz and F. Iglói, Phys. Rev. Lett. 121, 095301 
(2018)
[2] F. Iglói, B. Blass, G. Roósz and H. Rieger, Phys. Rev. B 98, 184415 
(2018)"


Best regards,
Andras Palyi