Seminar
The Static Glass Lengthscale at Low T
Monday, March 19, 2018 10:30 AM;
JGU Mainz, Physics, Medienraum
Speaker: Yoav G. Pollack; The Weizmann Institute of Science, Rehovot, Israel
The most conspicuous aspect of the phenomenon referred to as ”the glass transition” is the
dramatical increase in relaxation time of a supercooled liquid (10 − 14 orders of magnitude) upon a
modest reduction of temperature. A major theoretical question is whether the tremendous increase
in relaxation time is accompanied by an increase in a typical static lengthscale similar to critical
phenomena. Standard molecular dynamics techniques and most other protocols are limited in the
available relaxation times ( 4 − 5 orders of magnitude) making it impossible to simulate a liquid
cold enough to demonstrate a significant increase in lengthscale. Our work[1] employs a swap Monte
Carlo approach that allows us to reach an unprecedented lengthscale growth of more than 500%,
associated with an increase in relaxation time of 15 orders of magnitude. It is therefore the first
time that a temperature regime comparable to experiments was explored in simulation.
[1] R. Gutiérrez, S. Karmakar, Y. G. Pollack and I. Procaccia, Euro. Phys. Lett. 111, 56009 (2015).
Calendar
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