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Add to Calendar 12/5/2019 11:00 am 12/5/2019 America/Chicago Special ICMT Seminar: Topological Berry phases in Quantum and Classical systems DESCRIPTION:

The main subjects of this talk are topological Berry phases in solids, Bose-Einstein condensates in optical lattices and non-Hermitian systems. Topological Berry phases are Berry phases that are invariant under noise in parameters. One cause of such invariance can be crystallographic symmetries. I will explain that for cold atoms, differences in topological Berry phases could be inferred from topological Bloch oscillations. Another cause can be non-Hermiticities such as dissipation. Specifically, topological Berry phases result from adiabatic transport on manifolds of exceptional points--parameters at which not only the complex eigenvalues but also the eigenvectors of a non-Hermitian matrix coalesce. Topological Berry phases could thus be observed as discrete phase shifts in the oscillation amplitudes of a dielectric membrane in an optical cavity.

\n\nSPEAKER: Judith Hoeller, Yale
3110 ESB false

Special ICMT Seminar: Topological Berry phases in Quantum and Classical systems

Speaker Judith Hoeller, Yale
Date: 12/5/2019
Time: 11 a.m.
Location: 3110 ESB
Sponsor: The Institute for Condensed Matter Theory
Event Type: Seminar/Symposium
 

The main subjects of this talk are topological Berry phases in solids, Bose-Einstein condensates in optical lattices and non-Hermitian systems. Topological Berry phases are Berry phases that are invariant under noise in parameters. One cause of such invariance can be crystallographic symmetries. I will explain that for cold atoms, differences in topological Berry phases could be inferred from topological Bloch oscillations. Another cause can be non-Hermiticities such as dissipation. Specifically, topological Berry phases result from adiabatic transport on manifolds of exceptional points--parameters at which not only the complex eigenvalues but also the eigenvectors of a non-Hermitian matrix coalesce. Topological Berry phases could thus be observed as discrete phase shifts in the oscillation amplitudes of a dielectric membrane in an optical cavity.

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