Scientific Calendar Event

Starts 11 Jul 2024 16:00
Ends 11 Jul 2024 17:00
Central European Time
Budinich Lecture Hall and via Zoom

!!Please note change of venue!!

I will talk about the constraints imposed on the electromagnetic response of general media by microcausality (commutators of local fields vanish outside the light cone) and positivity of the imaginary parts (the medium can only absorb energy from the external field). The effect of the medium is encoded in the electric and magnetic permeabilities ε(ω, k) and μ(ω, k). In the case of dielectrics, we obtain bounds on the low-energy values of the response, ε(0, 0) and μ(0, 0). In particular the quantities ε(0, 0) − 1 and ε(0, 0) − 1/μ(0, 0) are constrained to be positive and equal to integrals over the imaginary parts of the response.

To join via Zoom:

Meeting ID: 964 5508 6743

Passcode: 602968

!! Please note change of venue!!

Seminar moved to Budinich Lecture Hall