Events

Dr. Jacob Blumoff , Yale University
Friday, September 21, 2018 - 9:00am
321 Allen Hall
Sep21
11:30am
Correlated Nanoelectronics
The study of strongly correlated electronic systems and the development of quantum transport in nanoelectronic devices have followed distinct, mostly non-overlapping paths. Electronic correlations of complex materials lead to emergent properties such as superconductivity, magnetism, and Mott insulator phases. Nanoelectronics generally starts with far simpler materials (e.g., carbon-based or semiconductors) and derives functionality from doping and spatial confinement to two or fewer spatial dimensions. In the last decade, these two fields have begun to overlap. ...
Talk location: Doherty Hall 2210 Summer2018 Seminar Series
Dr. Jeremy Levy
University of Pittsburgh
Sep24
4:30pm
Faster than fourier (pre)revisited: vorticulture, fractals, escape…
Band-limited functions can oscillate arbitrarily faster than their fastest Fourier component over arbitrarily long intervals: they can ‘superoscillate’. In physics, this counterintuitive mathematical phenomenon is associated with almost-destructive interference, and occurs near phase singularities in optics and on the world’s ocean tides; and it is associated with quantum weak measurements. Where superoscillations occur, functions are exponentially weak and vulnerable to noise. They are an unexpectedly compact way of representing fractals. Superoscillations in red light can ...
Talk location: Thaw Hall 11 Fall 2018 Colloquium
Sir Michael Victor Berry
University of Bristol
Sep25
12:00pm
Statistical mechanics of the transition to turbulence
How do fluids become turbulent as their flow velocity is increased? In recent years, careful experiments in pipes and Taylor-Couette systems have revealed that the lifetime of transient turbulent regions in a fluid appears to diverge with flow velocity just before the onset of turbulence, faster than any power law or exponential function. I show how this superexponential scaling of the turbulent lifetime in pipe flow is related to extreme value statistics, which I show is a manifestation of a mapping between transitional turbulence and the statistical mechanics model of directed percolation. This mapping itself arises from a further surprising and remarkable connection: laminar and turbulent regions in a fluid behave as a predator-prey ecosystem. Such ecosystems are governed by individual fluctuations in the population and being naturally quantized, are solvable by path integral techniques from field theory. I explain the evidence for this mapping, and propose how a unified picture of the transition to turbulence emerges in systems ranging from turbulent convection to magnetohydrodynamics.
Talk location: 321 Allen Hall Fall 2018 Seminar
Dr. Nigel Goldenfeld
University of Illinois at Urbana-Champaign
Sep25
2:30pm
Designing Sequence-Defined Peptoids for Bio-Inspired Synthesis of Functional Nanomaterials
Talk location: Chevron 150 Fall 2018 Seminar
Dr. Chunlong Chen
Pacific Northwest National Lab
Sep25
4:30pm
Variations on a theme of Aharonov and Bohm
The Aharonov-Bohm effect (AB) concerns the role in quantum physics of the vector potential of an impenetrable line of magnetic flux. Its partial anticipation by Ehrenberg and Siday, in terms of interference, was an approximation whose wavefunction was not singlevalued, and whose connection with the singlevalued AB wave involves topology: waves winding round the flux (‘many-whirls representation’). AB is a fine illustration of idealization in physics. There are four AB effects, depending on whether the ...
Talk location: 7316 Wean Hall Berry Phase Seminar Fall 2018 Physics
Sir Michael Victor Berry
University of Bristol
Sep26
4:00pm
Optica fantastica: images to illuminate the physics of light
A talk based entirely on pictures. Seas sparkle, sunshine generates rainbows, ships make waves. The explanations of these familiar phenomena are as abstract as elsewhere in physics, but pictures are helpful because in light and waves on water we can often see what we are thinking about. There are other optical phenomena that are not immediately perceived (associated with polarization or fine-scale interference, for example), but even with these we can generate pictures to help ...
Talk location: O'Hara Student Center Ballroom Fall 2018 Public Lecture
Sir Michael Victor Berry
University of Bristol
Sep27
4:00pm
Using Interfacial Electric Fields at Domain Walls to Stabilize Novel Ground States
Interfaces between two distinct complex oxide materials can display ground states which diverge greatly from the parent compounds, making them a playground to establish emergent phenomena. Particularly intriguing are the so-called polar interfaces where a diverging electrostatic potential leads to charge transfer. The canonical polar interface between two insulating oxides, LaAlO3/SrTiO3, forms a two-dimensional electron liquid which superconductors at low-temperature and where the conductivity can be manipulated by changing the film surface. Here, I will ...
Talk location: 321 Allen Hall Fall 2018 Seminar
Dr. Julia Mundy
Harvard University
Sep28
11:30am
Topological Insulators and Superconductors
The last decade has seen the rapid growth of interest in materials that are topological because of strong spin-orbit coupling. These samples exhibit electronic surface states that have only half the electrons that a carrier accumulation layer has. The surface states have energy between the occupied valence band and the unoccupied conduction band and the energy/momentum dispersion is linear forming two so-called Dirac cones that meet at the Dirac point, often k=0. They exhibit spin-momentum ...
Talk location: Doherty Hall 2210 Summer 2018 Seminar Series
Dr. James N. Eckstein
University of Illinois Urbana-Champaign
Oct03
4:00pm
Dr. Jillian Buriak (University of Alberta)
Talk location: O'hara Student Center Fall 2018 Seminar
Dr. Jillian Buriak
University of Alberta, Canada
Oct05
11:30am
Coupling Spin Qubits to Dynamic Nanoscale Magnetic Textures for Enhanced Quantum Sensing and Control
As we begin to look at how spin qubits might be integrated into a scalable platform, a fruitful strategy is to engineer the magnetic environment of the spins using micron- or nanometer-scale ferromagnetic (FM) elements, for functionalities such as nanoscale addressability, spin-wave mediated coupling, or enhanced sensing. The promise of these FM/spin interactions brings with it the question of how the coherence properties of the spin will be affected by coupling to these complex mesoscopic ...
Talk location: Doherty Hall 2210 Summer2018 Seminar Series
Dr. Jesse Berezovsky
Case Western Reserve University
Oct11
4:00pm
Building a quantum computer using silicon quantum dots
In principle, quantum computers that exploit the nature of quantum physics can solve some problems much more efficiently than classical computers can. Motivated by the tremendous scalability of classical silicon electronics, we are working to build a large-scale quantum computer using silicon technology similar to that used to build current classical computers. This talk will discuss the fundamental physics and materials science challenges that arise, and how close coupling between theory and experiment has enabled ...
Talk location: Allen 321 Fall 2018 Seminar
Dr. Sue Coppersmith
University of Wisconsin-Madison
Oct12
11:30am
Ultrafast Optical Probing of Correlated Polar Metals
There is considerable interest today in quantum materials. While all materials obey quantum mechanics, there is specific interest in phenomena that go beyond the independent single electron approximation, and arise in strongly correlated electron systems, strong spin-orbit coupled systems, and topologically protected systems. In this talk, I will present an interesting state of matter called polar metals in a correlated electron system, Ca3Ru2O7. The talk will present the origin of the counterintuitive polar displacements in ...
Talk location: Doherty Hall 2210 Summer2018 Seminar Series
Dr. Venkatraman Gopalan
Pennsylvania State University
Oct15
4:30pm
Are we quantum computers, or merely clever robots?
Of course quantum information processing is not possible in the warm wet brain. There is, however, one \loophole" - oered by nuclear spins - that must be closed before acknowledging that we are merely clever robots. Putative neural quantum processing with nuclear spins seemingly requires fulllment of many unrealizable conditions: for example, a common biological element with a very isolated nuclear spin to serve as a qubit, a mechanism for quantum entangling qubits, a mechanism ...
Talk location: Thaw 11 Fall 2018 Seminar
Matthew Fisher
University of California Santa Barbara
Oct17
3:00pm
Science2018
Come help unify and promote Quantum Science and Engineering in Pittsburgh at Science2018: Wednesday through Friday, October 17-19, 2018 Alumni Hall & Wyndham Pittsburgh University Center
Talk location: Alumni Hall PQI Event
Pittsburgh Quantum Institute
Visit our booth!
Oct18
4:00pm
Orbital selective pairing in Fe-based superconductors
Iron-based superconductors are unconventional superconductors with relatively high Tc that derive from metallic parent compounds with several Fe d-states dominant at the Fermi level. This gives rise to a number of novel effects based on differentiated degree of correlation of the different orbital states. I discuss the influence on spin-fluctuation pairing theory of orbital selective strong correlation effects in Fe-based superconductors, particularly Fe chalcogenide systems. This paradigm yields remarkably good agreement with the experimentally observed ...
Talk location: 321 Allen Fall 2018 Seminar
Dr. Peter Hirschfeld
University of Florida
Oct22
4:30pm
Dr. Stéphane Kéna-Cohen (Montreal Polytechnique)
Talk location: Thaw 11 Fall 2018 Seminar
Dr. Stéphane Kéna-Cohen
Montreal Polytechnique
Oct30
8:00am
2018 Conference on Materials for Quantum Computing (Day 1/4)
Scope: Materials science and device physics in semiconductor-superconductor heterostructures, van der Waals materials, superconducting and topological qubits. Invited Speakers: Philip Kim (Harvard) Barbara Jones (IBM) Will Oliver (MIT) Xavier Waintal (CEA Grenoble) Roman Lutchyn (Microsoft) Javad Shabani (NYU) Manuel Houzet (CEA Grenoble) Jay Sau (Maryland) Sebastien Plissard (Toulouse) Andrea Young (UCSB) KT Law (HKUST) Christopher Palmstrom (UCSB) Peter Krogstrup (Copenhangen) Felix von Oppen (FU Berlin) Erik Bakkers (TU Eindhoven) David Cobden (Washington) Cristian Urbina (CEA ...
Talk location: University Club, University of Pittsburgh 123 University Pl, Pittsburgh, PA 15213 Fall 2018 Conference
Multiple Speakers
Oct31
8:00am
2018 Conference on Materials for Quantum Computing (Day 2/4)
Scope: Materials science and device physics in semiconductor-superconductor heterostructures, van der Waals materials, superconducting and topological qubits. Invited Speakers: Philip Kim (Harvard) Barbara Jones (IBM) Will Oliver (MIT) Xavier Waintal (CEA Grenoble) Roman Lutchyn (Microsoft) Javad Shabani (NYU) Manuel Houzet (CEA Grenoble) Jay Sau (Maryland) Sebastien Plissard (Toulouse) Andrea Young (UCSB) KT Law (HKUST) Christopher Palmstrom (UCSB) Peter Krogstrup (Copenhangen) Felix von Oppen (FU Berlin) Erik Bakkers (TU Eindhoven) David Cobden (Washington) Cristian Urbina (CEA ...
Talk location: University Club, University of Pittsburgh 123 University Pl, Pittsburgh, PA 15213 Fall 2018 Conference
Multiple Speakers
Nov01
8:00am
2018 Conference on Materials for Quantum Computing (Day 3/4)
Scope: Materials science and device physics in semiconductor-superconductor heterostructures, van der Waals materials, superconducting and topological qubits. Invited Speakers: Philip Kim (Harvard) Barbara Jones (IBM) Will Oliver (MIT) Xavier Waintal (CEA Grenoble) Roman Lutchyn (Microsoft) Javad Shabani (NYU) Manuel Houzet (CEA Grenoble) Jay Sau (Maryland) Sebastien Plissard (Toulouse) Andrea Young (UCSB) KT Law (HKUST) Christopher Palmstrom (UCSB) Peter Krogstrup (Copenhangen) Felix von Oppen (FU Berlin) Erik Bakkers (TU Eindhoven) David Cobden (Washington) Cristian Urbina (CEA ...
Talk location: University Club, University of Pittsburgh 123 University Pl, Pittsburgh, PA 15213 Fall 2018 Conference
Multiple Speakers
Nov02
8:00am
2018 Conference on Materials for Quantum Computing (Day 4/4)
Scope: Materials science and device physics in semiconductor-superconductor heterostructures, van der Waals materials, superconducting and topological qubits. Invited Speakers: Philip Kim (Harvard) Barbara Jones (IBM) Will Oliver (MIT) Xavier Waintal (CEA Grenoble) Roman Lutchyn (Microsoft) Javad Shabani (NYU) Manuel Houzet (CEA Grenoble) Jay Sau (Maryland) Sebastien Plissard (Toulouse) Andrea Young (UCSB) KT Law (HKUST) Christopher Palmstrom (UCSB) Peter Krogstrup (Copenhangen) Felix von Oppen (FU Berlin) Erik Bakkers (TU Eindhoven) David Cobden (Washington) Cristian Urbina (CEA ...
Talk location: University Club, University of Pittsburgh 123 University Pl, Pittsburgh, PA 15213 Fall 2018 Conference
Multiple Speakers
Nov02
11:30am
Dr. Lena F. Kourkoutis (Cornell University)
Talk location: Doherty Hall 2210 Summer2018 Seminar Series
Dr. Lena F. Kourkoutis
Cornell University
Nov08
4:00pm
Synthesizing Brain Research within Quasicriticality
Empirical evidence suggests that living neural networks operate near a continuous phase transition, conjectured to be an optimal point for information storage and processing. Applying theoretical approaches, however, is challenging since vital features of neural networks present numerous obstacles to the applicability of traditional statistical physics tools, many of which have not yet been adapted to neuroscience. I will describe a simple cellular automaton model which allows for the characterization of the out-of-equilibrium transition and ...
Talk location: 321 Allen Hall Fall 2018 Seminar
Dr. Rashid Williams-Garcia
University of Pittsburgh
Nov09
11:30am
Dr. Vincent Sokalski (Carnegie Mellon University)
Talk location: Doherty Hall 2210 Summer2018 Seminar Series
Dr. Vincent Sokalski
Carnegie Mellon University
Nov15
4:00pm
Dr. Anja Metelmann (Freie Universität Berlin)
Talk location: 321 Allen Hall Fall 2018 Seminar
Dr. Anja Metelmann
Freie Universität Berlin, Germany
Nov27
4:00pm
Dr. Britton Plourde (Syracuse University)
Talk location: Allen 321 Fall 2018 Seminar
Dr. Britton Plourde
Syracuse University
Feb11
4:30pm
Dr. Christopher Hendon (University of Oregon)
Title and Abstract TBD
Talk location: Thaw 11 Spring 2019 Seminar
Christopher Hendon
University of Oregon
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