Condensed-Matter Seminar

Vasily R. Shaginyan

Location: 
Danciger B lower seminar room
Thu, 30/05/2019 - 12:00 to 13:30

Flat bands, scanning tunneling microscopy, and the violation of time-reversal symmetry M. Ya. Amusia and V. R. Shaginyan The topological fermion condensation quantum phase transition (FCQPT) paves a new avenue in modern physics. Such a transition belongs to the unique type of quantum phase transitions the originators of the theory of instabilities omitted, and leads to the topological reconstruction of the Fermi surface.

Special Seminar: Enrico Rossi

Sun, 16/06/2019 - 12:00 to 13:30

"Van der Waals heterostructures with spin-orbit coupling" Van der Waals (vdW) systems offer an unprecedented freedom to combine materials with different electronic properties. Such freedom allows the creation of novel heterostructures with unique and tunable effects. In this talk I will discuss the properties of vdW systems in which one of the layers has strong spin-orbit coupling. I will consider in detail two exemplary vdW systems in this class: heterostructures formed by graphene and a topological insulator (TI), and heterostructures

Dmitry Kovrizhin

Thu, 13/06/2019 - 12:00 to 13:00

Title: Casimir energy and semiclassical degeneracies for magnetic Skyrmions Abstract:

Omri Golan

Location: 
Danciger B lower seminar room
Thu, 23/05/2019 - 12:00 to 13:00

Boundary central charge from bulk odd viscosity - chiral superfluids

Special Condensed-Matter Seminar:"Spin-mechanics with a micro-diamond in an ion trap"

Location: 
Danciger B building, Seminar room
Tue, 19/03/2019 - 14:00 to 15:30

Lecturer: Tom Delcord-Carnaut, Laboratoire Pierre Aigrain Abstract: Inspired by experiments on cold atoms and ions, optomechanics has made major steps toward realizing quantum mechanics experiments with macroscopic mechanichal oscillator [1,2]. Here we use a micro-diamond levitating in an ion trap under low vacuum as a mechanical oscillator and ensemble of NV center spins within it to control its motion. Such levitated system were proposed under high vacuum and with single spin to enter the quantum regime [3-5].

Special Condensed-Matter Seminar: "The large width limit of neural networks and the 't Hooft expansion"

Location: 
Danciger B building, Seminar room
Wed, 03/04/2019 - 12:00 to 13:30

Speaker: Guy Gur Ari from google Abstract: The large width limit has emerged as a useful tool for studying deep neural networks. We adapt the 't Hooft expansion to this case, allowing us to easily work out scaling laws in large width networks using Feynman diagrams. We apply these techniques to quantities involving deep network observables such as the loss function, the Hessian, and the Neural Tangent Kernel.

Zi Yang Meng

Location: 
Danciger B building, Seminar room
Tue, 19/03/2019 - 12:00 to 13:30

Title: Revealing quantum criticality from Monte Carlo simulations Speaker: Zi Yang Meng, IOP, CAS

Itay Hen

Thu, 02/05/2019 - 12:00 to 13:00

Title: Future of Analog Quantum Computing: Hopes and Hinderances Abstract: It is yet unclear whether even ideal analog quantum machines can perform computational tasks faster than their classical counterparts. I will discuss the results of several recent studies that suggest the existence of several fundamental limiting factors to, as well as a couple of promising directions for, physical analog quantum devices.

Martin Bluschke

Location: 
Danciger B lower seminar room
Mon, 29/04/2019 - 15:00 to 16:00

Title: Pseudogap energy scale independent of charge-density-wave order in a high-T­c cuprate