Due to the current situation (COVID-19), the guest lectures of the MPQ Colloquium will only take place online until further notice. Details on participation will be sent via the mailing lists [wiss-mpq] and [Mpq-colloquium-stream]. Please register using the adjacent link.

Scientific organization of the talks:  Dr. Stephan Dürr and Dr. Thomas Udem

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+++ONLINE KOLLOQUIUM+++Driven Quantum Materials (MCQST-Kolloquium) (Prof. Dr. Andrea Cavalleri)

I will discuss how coherent electromagnetic radiation at Tera-Hertz frequencies can be used to drive complex solids periodically, controlling the coupling between their collective excitations. [more]

+++ONLINE KOLLOQUIUM+++ A Fermi gas of molecules with tunable dipolar interactions (MCQST-Kolloquium) (Prof. Dr. Jun Ye)

The advent of a degenerate Fermi gas of polar molecules sets the stage to explore novel many-body physics. We apply a precisely controlled electric field to tune the elastic dipolar interaction by orders of magnitude while suppressing reactive losses. [more]
Double Feature of Dr. Matthew Weidman and M.Sc. Annie Jihyun Park [more]

+++ONLINE KOLLOQUIUM+++ Phase transitions in the complexity of simulating random shallow quantum circuits (MCQST-Kolloquium) (Prof. Aram Harrow)

The appeal of quantum computing is based on the fact that simulating N quantum systems on a classical computer takes time exponential in N. This exponential hardness is known to hold even for shallow quantum circuits, meaning unitary dynamics that run for a constant amount of time. We show that when the quantum circuits are made of random gates on a 2D geometry, they are not always exponentially hard to simulate. [more]
In this talk, I discuss our recent research findings in nano-optics, electromagnetics and acoustics, showing how suitably tailored meta-atoms and arrays of them enable new phenomena to manipulate light, radio-waves and sound. I discuss venues to largely break Lorentz reciprocity and realize isolation without the need of a magnetic bias, based on broken time-reversal symmetry induced by mechanical motion, spatio-temporal modulation and/or nonlinearities. [more]
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