Invitation to the ICTP Webinar Colloquium by Prof. Maciej Lewenstein on "To Thermalize or not to Thermalize, that is the Question", on Wednesday 23 February at 16:00 hrs CET

[ICTP/director]

Dear All,

You are most cordially invited to the ICTP Webinar Colloquium by Prof. 
Maciej Lewenstein, on "To Thermalize or not to Thermalize, that is the 
Question", on Wednesday 23 February at 16:00 hrs CET

Advance registration is required at:

https://zoom.us/webinar/register/WN_WifhpYvYDR5i67rQsWkVsAw 
<https://zoom.us/webinar/register/WN_WifhpYYDR5i67rQsWkVsAw>

After registering, you will receive a confirmation email containing 
information about joining the webinar.

*Biosketch: *Maciej Lewenstein graduated as MSc at Warsaw University in 
1978 and PhD at Universität Essen in 1983. He was research fellow in 
Essen, at Harvard, Commisariat a l'Énergie Atomique in Saclay and at 
Joint Institute for Laboratory Astrophysics at Boulder. He was on 
faculty of Centre for Theoretical Physic in Warsaw (1986-1994), CEA in 
Saclay (1995-1998), of the Leibniz University Hannover (1998-2005). In 
2005 he moved to Catalonia as ICREA Research Professor at ICFO in 
Castelldefels. His interests include quantum optics, quantum physics, 
quantum information, atto-second science, and statistical physics. He is 
an acclaimed jazz writer and critic, author of “Polish Jazz Recordings 
and Beyond”. He published over 600 papers, cited in WoS over 42000 times 
with H-index=101. Recipient of 3 ERC AdGs.

*Abstract: *Quantum closed systems, when perturbed or quenched, tend to 
“thermalize” in an ergodic way: the reduced density matrix of a block of 
the system in well approximated by the Gibbs-Boltzmann canonical 
ensemble, at least for averages of local observables and their not too 
high moments. There are several exceptions from this situation: i) 
Systems with multiple constants of motion are described by generalized 
Gibbs-Boltzmann ensembles; ii) Many-body localization (MBL) occurs in 
certain disordered systems; iii) MBL may occur also in non-disordered 
systems; iv) Local conservation laws, like the Gauss law, may prevent 
thermalization, for instance in Lattice Gauge Theory (LGT) models; v) 
Systems may exhibit quantum many-body scars, i.e. low entropy states 
that cause “weak” ergodicity breaking; vi) The latter occur frequently 
in confined LGT, but also deconfined ones.

The talk will be followed by a question/answer session.

For info, please check the following link: http://indico.ictp.it/event/9849/

We look forward to seeing you online!

With best regards,

Office of the Director, ICTP