SUNMONTUEWEDTHUFRISAT
Events for April 05, 2017
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Matthew Gilbert - Nano Science & Technology Seminar Series, Wednesday, April 5th at 2:00pm in KAP 209
Wed, Apr 05, 2017 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Matthew J. Gilbert, University of Illinois Urbana-Champaign
Talk Title: Unconventional Superconductivity in Topological Heterostructures
Abstract: The search for materials and systems that exhibit unconventional superconductivity, or superconductivity beyond the canonical s-wave pairing as predicted in BCS theory, is one of the most active areas within condensed matter physics. This effort has been reinvigorated by the interesting properties inherent to a new class of materials that possess topological phases. A topological phase is unique in that it does not break any of the underlying symmetries of the system and cannot be described by a local order parameter. In other words, the inherent properties of the system cannot be changed by adiabatic shifts in materials parameters unless the system passes a quantum critical point associated with a phase transition. More recently, this search has taken on additional significance due to the fact that systems that possess unconventional superconductivity may enable a new type of fault tolerant quantum information processing that may significantly increase computing power when compared to traditional information processing. In this talk, I will discuss the appearance and signatures of unconventional superconductivity and review some of the most prominent systems that have been predicted to exhibit unconventional superconductivity. In particular, I will focus on heterostructures containing s-wave superconductors and proximity-coupled 3D time-reversal invariant topological insulators. I will explain some of the experimentally relevant conditions that must be satisfied in order to observe the features of unconventional superconductivity and conclude by examining the potential for finding unconventional superconductivity in emergent topological materials such as semimetals and crystalline insulators.
Biography: Matthew J. Gilbert is an Associate Professor in the Department of Electrical and Computer Engineering at the University of Illinois at Urbana-Champaign (UIUC). He is affiliated with the Micro and Nanotechnology Laboratory, the Department of Physics and the Institute for Condensed Matter Theory at UIUC. His research broadly focuses on theoretically elucidating new phenomena in emergent nanoscale systems with the goal of developing new types of nanoelectronic and nanophotonic devices and functionality for next-generation information processing systems. The majority of his current work revolves around understanding the properties of topological materials, including insulators, semimetals and superconductors, with the goal of understanding their potential role in the post-CMOS device landscape. This research also includes examinations into the appearance and stability of unconventional superconductivity and non-Abelian anyons, such as Majorana and parafermions, in topological systems for the purposes of topological quantum computation. His emerging research interests include: the role of interactions in the classification and properties of topological systems, dissipation and relaxation in non-equilibrium materials and systems, transport properties and phenomena in 2D materials particularly those under strain, energy harvesting using topological materials, and designer layered quantum materials. He has authored more than 70-refereed publications, and has given presentations at over 50 international conferences.
Host: Wang, Zhou, Cronin, Wu - MHI
Location: Kaprielian Hall (KAP) - 209
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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MHI CommNetS seminar
Wed, Apr 05, 2017 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Hamidreza Tavafoghi, University of Michigan
Talk Title: Dynamic Market Mechanisms for Wind Energy
Series: CommNetS
Abstract: We investigate the problem of market mechanism design for wind energy integration into the power grid. We show that the current static two-settlement market structure is not efficient for the integration of wind energy, and does not provide appropriate information for scheduling of flexible loads/reserves. We consider a dynamic two-step model with strategic seller(s) with wind generation and one buyer, who trade energy through a mechanism determined by a designer (ISO). The seller has private information about his technology and wind condition, which he learns dynamically over time. We consider the existing (static) forward and real-time mechanisms that take place at times T = 1 and T = 2, respectively. We propose a dynamic mechanism that provides a coupling between the outcomes of the forward and real-time markets, and show that the dynamic mechanism outperforms the forward and real-time mechanisms for a general objective of the designer. We demonstrate that the advantages of our proposed dynamic mechanism come from the designer's ability to price discriminate and the seller's exposure to penalty risk. Moreover, our proposed mechanism reveals (probabilistic) information about wind generation in advance so as to schedule flexible loads/reserves efficiently. We further analyze variants of the dynamic mechanism that guarantee no penalty risk for sellers, and/or monitor the wind condition.
Biography: Hamidreza Tavafoghi is a Ph.D. candidate in the Electrical Engineering and Computer Science department at the University of Michigan working with Prof. Demosthenis Teneketzis, where he also pursues a M.A. in Economics. His research interests lie in stochastic control, game theory, mechanism design, and strategic learning. Currently, he is working on the design and analysis of informational and monetary incentive mechanisms for cyber-physical systems with applications to power systems, transportation networks, and security. Hamidreza received his B.Sc. in Electrical Engineering from Sharif University of Technology, Tehran, Iran, 2011, and his M.Sc. in Electrical Engineering: Systems from the University of Michigan, 2013. He was awarded the Dow Sustainability Fellowship in 2015. He is a Silver medalist of 37th International Physics Olympiad, Singapore, 2006, and a Gold medalist of 18th National Physics Olympiad, Iran, 2005.
Host: Prof. Ashutosh Nayyar
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Annie Yu
