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.

Emergent SU(4) Kondo physics in a spin-charge-entangled double quantum dot

05 Dec2014

Speaker: Andrew Keller, Stanford University

Time: December 5, 2014, 10:00 - 11:00

Location: Hennings 318

Quantum impurity models, which describe how a local degree of freedom interacts with a continuum, are central to condensed-matter physics. Such models may be naturally implemented with quantum dots coupled to each other and to metallic leads. Here we detail a many-body Kondo state occurring when two quantum dots are coupled electrostatically. We use orbital state-resolved bias spectroscopy to...

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Phase lapses and dephasing in quantum Hall interferometers

04 Dec2014

Speaker: Yehuda Dinaii, Weizmann Institute

Time: December 4, 2014, 14:00 - 15:00

Location: Hennings 318

In this talk I will discuss the phenomena of dephasing and phase lapses as they occur in two setups operating in the quantum Hall regime. Both setups consist of a quantum dot and an electronic Mach-Zehnder interferometer. Dephasing, i.e. loss of coherent transport, and phases lapses, i.e. abrupt jumps in the phase of the transmission amplitude, turn out to...

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  • Seminar
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Ettore Majorana and his strange particles

04 Dec2014

Speaker: Marcel Franz, University of British Columbia

Time: December 4, 2014 16:00 - 17:00

Location: Hennings 201

In 1937 Italian physicist Ettore Majorana predicted the existence of strange fermionic particles that are their own antiparticles. It is possible that neutrinos realize such Majorana fermions but 75 years after the historical prediction the evidence remains inconclusive. In this talk I will describe recent efforts to engineer and observe Majorana fermions in solid state systems which appear to...

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Specific heat of underdoped cuprate superconductors in high magnetic fields

01 Dec2014

Speaker: Jonathon Kemper, National High Magnetic Field Laboratory, University of Florida

Time: December 1, 2014, 12:00 - 13:00

Location: AMPEL 311

I will discuss specific heat measurements on three families of hole-doped cuprate superconductors, including YBa2Cu3O6+x where x=0.43, 0.47,0.51 and 0.67, aimed at tracking the low energy electronic density of states as a function of magnetic field in both the superconducting and resistive state. The underlying goal is one of understanding how superconducting state at zero field evolves into one...

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Vignettes from the world of liquid crystals

27 Nov2014

Speaker: Peter Palffy-Muhoray, Kent State University

Time: November 27, 2014, 16:00 - 17:00

Location: Hennings 201

Liquid crystals, discovered some 125 years ago, are orientationally ordered soft materials. Although they have received considerable attention – much of it due to their potential for applications in display devices – they continue to astonish, puzzle and delight. In this talk, I will describe some unusual phenomena in liquid crystalline systems which originate in orientational order. I will...

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The limits of the nuclear landscape

20 Nov2014

Speaker: Witold Nazarewicz, Michigan State University/ORNL

Time: November 20, 2014, 16:00 - 17:00

Location: Hennings 201

Understanding nuclei is a quantum many-body problem of incredible richness and diversity and studies of nuclei address some of the great challenges that are common throughout modern science. Nuclear structure research strives to build a unified and comprehensive microscopic framework in which bulk nuclear properties, nuclear excitations, and nuclear reactions can all be described. A new and exciting focus...

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Extraordinary Acoustic Raman (EAR): Listening in on Nanoparticle Vibrations

20 Nov2014

Speaker: Reuven Gordon, University of Victoria

Time: November 20, 2014, 14:00 - 15:00

Location: AMPEL 311

Colloidal quantum dots, viruses, DNA and all other nanoparticles have acoustic vibrations that can act as ‘fingerprints’ to identify their shape, size and mechanical properties, yet high-resolution Raman spectroscopy in this low-energy range has been lacking. Here, we introduce extraordinary acoustic Raman (EAR) spectroscopy, a new technique to measure the Raman-active vibrations of single isolated nanoparticles in the 0.1–10...

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Optimal control and optimal response in microscopic nonequilibrium systems

17 Nov2014

Speaker: David Sivak, Simon Fraser University

Time: November 17, 2014, 12:00 - 13:00

Location: Hennings 318

Molecular machines are protein complexes that convert between different forms of energy, and they feature prominently in essentially any major cell biological process. A plausible hypothesis holds that evolution has sculpted these machines to efficiently transmit energy and information in their natural contexts, where energetic fluctuations are large and nonequilibrium driving forces are strong. Toward a systematic picture of...

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Making Comparisons – A Strategy for Teaching Scientific Reasoning in a First Year lab

13 Nov2014

Speaker: Doug Bonn, University of British Columbia

Time: November 13, 2014, 16:00 - 17:00

Location: Hennings 201

For the past 6 years, the PHYS 107/109/ScienceOne labs have served as a testing ground for new approaches to teaching in laboratories. Over time this has evolved into a focus on teaching students widely-applicable data handling skills: especially, understanding uncertainty, statistical tools, and graphical techniques. In the past year we have also targeted students’ critical thinking, with a relatively...

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Thermal and electrical transport in the heavy fermion compound YbRh2Si2 under magnetic fields

13 Nov2014

Speaker: Heike Pfau, Max Planck Institute for Chemical Physics of Solids, Dresden

Time: November 13, 2014, 14:00 - 15:00

Location: Hennings 318

The Kondo effect couples a local magnetic moment with conduction electrons to a composite heavy quasiparticle leading to a non-magnetic ground state. At the same time, a coupling between the moments favors a magnetically ordered state. An applied magnetic field influences the ground state and the nature of the heavy quasiparticles in two ways: On one side, it can...

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