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Уважаемые сотрудники ИТФ,<br>
<br>
В пятницу 25 октября в 11:30 состоится коллоквиум:<br>
<br>
Yuval Gefen (Weizmann Institute of Science, Israel)<br>
<b>Physics at the Edge of a QHE setting</b><br>
<br>
The structure of the edge of a QHE edge is constrained, but not
dictated, by the topology of the bulk. Particularly interesting is
the class of hole-conjugate fractional QH states. For such states
the edge hosts counter-propagating modes that are responsible for
quantized electrical and thermal conductance. In the coherent
quantum limit renormalized edge modes emerge, which may involve
neutral modes with non-trivial exchange statistics. I will discuss
the behavior of topology-influenced transport coefficient both in
the coherent and the fully equilibrated regimes, topological
classification of non-equilibrium shot noise, and the relation to
recent experiments.<br>
<br>
<br>
После этого в 15:00 состоится семинар:<br>
<br>
Yan V. Fyodorov (Dept. of Mathematics, King’s College London)<br>
<b>Zeroes of S-matrix entries and random 'anti-lasing'</b><br>
<br>
Motivated by recent experimental interest in 'random anti-lasing'
(e.g. K. Pichler et al. Nature 567, 351 (2019)) I consider
manifestations of zeroes of scattering matrices in wave-chaotic
cavities. In particular, I will introduce the notion of Reflection
Time Difference playing the same role for the S-matrix zeroes as the
Wigner time delay plays for the S-matrix poles, and a possibility of
its experimental measurement. I will then discuss how statistics of
complex zeroes of scattering matrix entries can be described in the
framework of RMT-based model of resonance scattering.<br>
Presentation will be based on papers arXiv:1908.06920 and J. Phys. A
50, 30LT01 (2017). <br>
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