Events

SBQMI hosts numerous academic and other events throughout the year. Please search by audience or event type, or enter a keyword, to find events of interest to you.

If you are interested in inviting our faculty as keynote speakers at your event, or are a school group interested in visiting our labs, please contact us to submit your request.

Seminar: Generative training of quantum Boltzmann machines with hidden units

13 Sep2019

Speaker: Nathan Wiebe, Affiliate Assistant Professor, University of Washington

Time: Sept. 13, 2019:: 11:00AM - 12:00PM

Location: BRIM 311

We provide the first method for fully quantum generative training of quantum Boltzmann machines with both visible and hidden units while using quantum relative entropy as an objective. This is significant because prior methods were not able to do so due to mathematical challenges posed by the gradient evaluation. We present two novel methods for solving this problem. The first...

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CM Seminar - Hydrodynamic transport in Luttinger semi-metals

12 Sep2019

Speaker: Julia Link, Simon Fraser University

Time: Sep 12 2019 :: 2:00PM - 3:00PM

Location: BRIM 311

Abstract: In the hydrodynamic regime it is possible to investigate the universal collision-dominated dynamics of the isolated electron fluid, while the couplings to the lattice and to impurities becomes secondary. An important transport property is the shear viscosity which describes whether the electron fluid behaves laminar or turbulent. The ratio shear viscosity over entropy is bounded from below and...

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CM Seminar: Can machine learning outperform a condensed-matter physicist?

05 Sep2019

Speaker: Roman Krems, UBC Chemistry

Time: Sept. 5, 2019:: 2:00PM - 3:00PM

Location: BRIM 311

Abstract: Machine learning models are usually trained by a large number of observations (big data) to make predictions through the evaluation of complex mathematical objects. However, in many applications in science, particularly in quantum condensed-matter physics, obtaining observables is expensive so information is limited. In the present work, we consider the limit of ‘small data’. Usually, ‘big data’ are for...

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CM Seminar: Imaging Viscous Flow of the Dirac Fluid in Graphene Using a Quantum Spin Magnetometer

04 Sep2019

Speaker: Mark Jen-Hao Ku, Harvard University

Time: Sept. 4, 2019:: 2:00PM - 3:00PM

Location: BRIM 311

Abstract: Hydrodynamic electron fluid has emerged as a paradigm of strongly-correlated electronic transport. In particular, the electron-hole plasma in charge-neutral graphene is predicted to realize a quantum critical fluid whose transport features a universal hydrodynamic description relevant to strongly-correlated electrons in high-Tc superconductors. This “Dirac fluid” is expected to have a shear viscosity close to a minimum bound, with...

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CM Seminar: Three superconducting phases of 1111-type iron-based superconductor RFeAs1-xPnxO1-y(F,H)y (R=La and Nd, Pn=P and Sb)

18 Jul2019

Speaker: : Prof. Shigeki Miyasaka, Department of Physics, Osaka University, Japan

Time: July 18, 2019, 2:00 PM - 3:30 PM

Location: Brimacombe Building 311

Abstract: In one of 1111-type iron-based superconducting (SC) system LaFeAsO, the electron doping level and the local crystal structure can be controlled by the F/H substitution for O and P for As. By these chemical substitution effects, Fermi surface (FS) topology has been changed, and three different SC phases appears in LaFeAs 1- x P x O 1- y...

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Seminar: Majorana-Hubbard model on the triangular lattice

17 Jul2019

Speaker: Tarun Tummuru, SBQMI

Time: 2:00 PM - 3:00 PM

Location: BRIM 311

Of late, there has been a growing body of experimental work that brings us closer to an undoubted realization of Majorana fermions in condensed matter systems. In two-dimensions these quasiparticles arise as zero energy vortex bound states on the surface of a topological superconductor. And in the presence of a lattice of these vortices, interactions between these Majorana zero modes...

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SEMINAR: VALLEY POLARIZATION IN TRANSITION METAL DICHALCOGENIDES MONOLAYERS BY OPTICAL PUMPING

15 Jul2019

Speaker: Dr. Junfeng Dai, Southern University of Science and Technology

Time: 10:00 AM - 11:00 AM

Location: BRIM 311

With the development of semiconductor industry, scaling of electronic devices in integrated circuits has approached technological and physical limit, such as quantization of electrical conductance in thin transistor channels. Researchers have to search new materials and manipulate new freedom of electrons to overcome this physical limit. So the spin- and valley-based electric devices on two-dimensional materials become an important breakthrough...

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CM Seminar: Kondo Blockade and Generative Hamiltonian Learning for molecular electronics

06 Jun2019

Speaker: Prof. Andrew Mitchell, University College Dublin, Ireland

Time: June 6, 2019, 2:00 PM - 3:00 PM

Location: BRIM 311

Abstract: When nanoscale components are incorporated into external circuits, electronic transport can exhibit striking quantum phenomena with no classical analogue. Molecular junctions, in which a single molecule bridges the gap in a nanowire, constitute a particularly rich set of systems, demonstrating both strong correlation effects such as Coulomb blockade and Kondo, as well as quantum interference arising from orbital complexity....

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CM Seminar: From MEMS to Gravitational Wave Detectors: modeling energy dissipation in oxyde glasses at the atomic scale

05 Jun2019

Speaker: David Rodney, University of Lyon

Time: June 5, 2019, 3:00 PM - 4:30 PM

Location: BRIM 311

Abstract:

How are sound waves attenuated when they travel in a medium? How to damp most efficiently the vibrations due to an earthquake? Inversely, how to build a stable resonator? or avoid loosing energy when a laser beam rebounds on a mirror in a gravitational wave detector, the process which currently limits the precision of these very large...

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CM Seminar: Vector beams, high harmonic generation and THz solenoidal magnetic fields

17 May2019

Speaker: Paul Corkum, Joint Attosecond Science Laboratory University of Ottawa and National Research Council of Canada

Time: May 17, 2019, 2:00 PM - 3:30 PM

Location: Macleod 418

Abstract: We use intense vector beams to generate high harmonics or to create solenoidal currents in solids or gases. We create circularly polarized harmonics and we predict THz magnetic fields reaching the scale that is only available at user facilities.

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