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I am sure my fellow-scientists will agree with me if I say that whatever we were able to achieve in our later years had its origin in the experiences of our youth and in the hopes and wishes which were formed before and during our time as students.

Felix Bloch

Colloquia

Physics Conference Room, SB B326
Coffee starts at 12:00 PM and talk starts at 12:15 PM
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15
Feb '23
Next Event
In-person
+ Online
LPMMC University Grenoble Alpes/CNRS
Bart van Tiggelen
The subtle role of longitudinal waves in light scattering
This talk is accessible via Zoom or use
meeting ID 829 2687 2594 and passcode 866995 to join
Abstract:
Longitudinal electric fields exist in the presence of electric charges, either real or induced. They often hide in the near-field of an object, give rise to local-field factors, stock energy, but alone do not induce a Poynting vector.
I will discuss two cases where their role is far from innocent.  In  a classical transport theory for electromagnatic waves inside media with electric dipoles, longitudinal waves mix with  transverse waves and induce a novel transport channel. This imposes a "minimum electromagnetic conductivity" and rules out Anderson localization. In QED,  longitudinal electric fields are strongly connected to the vector potential.  In the presence of an external magnetic field,  the presence of longitudinal fields inside a medium with   give rise to a diamagnetic Einstein - De Haas effect induced by the quantum vacuum.
6
Mar '23
In-person
+ Online
Tata Institute of Fundamental Research and Queens College
Krishna Joshi
Lasing over Anderson localized transport in 1D non-Hermitian photonic structures
Download PDF Add to Google Calendar Science Building B326 @12:15 pm
This talk is accessible via Zoom or use
meeting ID 829 2687 2594 and passcode 866995 to join
17
Apr '23
In-person
+ Online
Villanova University
Rebecca Phillipson
The Topology of Chaos: A Nonlinear Perspective on Accreting Compact Objects
This talk is accessible via Zoom or use
meeting ID 829 2687 2594 and passcode 866995 to join
22
May '23
In-person
+ Online
Stony Brook University
Mengkun Liu
TBA
This talk is accessible via Zoom or use
meeting ID 829 2687 2594 and passcode 866995 to join