Rajiv Singh, University of California Davis
Monday, February 27, 2017 - 4:30pm
Thaw Hall 102

The 2016 Nobel Prize in Physics to Kosterlitz, Thouless and Haldane honors a new set of ideas and theoretical formalism that has gradually become the mainstay of modern condensed matter thinking. Quantum Field Theory, Topology and the Renormalization Group, lie at the heart of present day theory of condensed matter. The Kosterlitz-Thouless theory of phase transitions and Haldane's conjecture on the spin dependence of spectrum of spin-chains were two of the most influential works in bringing these ideas together. These along with the Thouless-Kohmoto-Nightingale-Den Nijs-(TKNN) work on topological invariants of band structures were duly recognized by the Nobel committee. This talk will discuss how these theories defied existing paradigms and no-go theorems. And, how they continue to play a huge role in how we address quantum phases and phase transitions today. This Nobel Prize potentially sets the stage for many more prizes in the field of Topological Matter.

Feb28
11:00am
Women in Quantum Science and Engineering Lecture Series: Jeanie Lau
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
PQI Event Year of Diversity
Jeanie Lau
Ohio State University
Feb28
4:00pm
Kagome Spin Liquids and Nuclear Relaxation Rates in Herbertsmithites
The Kagome Lattice Heisenberg Model is one of the simplest realistic spin models with a quantum spin-liquid ground state. We discuss the current status of our understanding of this well-studied model. The precise nature of the spin-liquid state and the existence of a spin-gap in the model still remain in dispute. We also discuss experimental studies of Herbertsmithite material Kagome-antiferromagnet ZnCu_3(OH)_6Cl_2. We focus on NMR measurements by Imai and collaborators, who have presented strong evidence..
Spring 2017 Seminar
Rajiv Singh
University of California Davis
Mar07
11:00am
Women in Quantum Science and Engineering Lecture Series: Laura Greene
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
PQI Event Year of Diversity
Laura Greene
Florida State University
Mar09
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Year of Diversity Workshop: Strategies to Help Women Succeed in STEM Professions
Many groups are severely under-represented in STEM professions. This workshop will explore strategies to help women thrive in STEM professions. We will first focus on the barriers to their advancement before discussing strategies to promote and support diversity in STEM disciplines and raise overall standards. Faculty from the School of Arts & Sciences, engineering school, and medical school will be invited to attend. After the workshop, we will invite the participants to dinner to foster..
Year of Diversity Workshop
Chandralekha Singh
University of Pittsburgh
Mar13
4:30pm
Applying Ideas of Visual Cognition to Problem Solving in Physics
Problem solving is a major emphasis area of physics education that has been studied extensively over the past several decades. Frequently, physics problems – and their solutions – have strong visuospatial components. However, most research on physics problem solving has not drawn from research in visual cognition. Over the past four years a collaboration of physics education researchers and visual cognitive psychologists has been exploring and exploiting the link between cognition and eye movements manipulated..
Spring 2017 Seminar Physics education
Sanjay Rebello
Purdue University
Mar16
4:00pm
Marko Loncar (Harvard University)Spring 2017 Seminar
Marko Loncar
Harvard University
Mar21
11:00am
Women in Quantum Science and Engineering Lecture Series: Noa Marom
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
PQI Event Year of Diversity
Noa Marom
Carnegie Mellon University
Mar23
12:00pm
Using Ultrafast Laser Pulses and Computational Modeling to Understand Nonproportionality in Spectroscopic Gamma-Ray Detectors
Under gamma-ray or charged-particle excitation, scintillation light yield is a complicated function of carrier diffusion and cooling in the track along with kinetic rate terms depending on local excitation density. Up to 1021 electron-hole pairs/cm3 are produced in an initial track radius of about 3 nm. Extracting the fundamental rate constants directly from such conditions would require solving the diffusion and cooling problems in complex track structures first. Laser interband photon density response and time-resolved..
Spring 2017 Seminar Ultrafast
Richard Williams
Wake Forest University
Mar23
4:00pm
Rajamani Vijay (Tata Institute of Fundamental Research)Spring 2017
Rajamani Vijay
Tata Institute of Fundamental Research (TIFR)
Mar27
4:30pm
Electromechanics: A New Quantum Technology
Devices that combined electricity with moving parts were crucial to the very earliest electronic communications. Today, electromechanical structures are ubiquitous yet under-appreciated signal processing elements. These devices exploit the relative slowness of sound compared to light to create compact filter and clock elements. Moreover they convert force and acceleration signals into more easily processed electrical signals. Can these humble, apparently classical, objects exhibit genuinely quantum behavior? Indeed, by strongly coupling the vibrations of a micromechanical..
Spring 2017 Seminar Condensed Matter
Konrad Lehnert
University of Colorado Boulder
Mar30
4:30pm
Voltage Control of Magnetic AnisotropySpring 2017 Seminar
Weigang Wang
University of Arizona
Apr03
4:30pm
Quantum Control of Spins in Silicon
One of the remarkable features of spins in the solid state is the enormous range of time-scales over which coherent manipulation is possible. If one considers gate-controlled manipulation of nuclear spins at one extreme, and strongly-interacting multi-electron qubits at the other extreme, coherent control of spins in semiconductors has been demonstrated with over 9 orders of magnitude variation in the manipulation time. Remarkably, confining three electrons in two neighboring quantum dots enables all electrical control..
Spring 2017 Seminar Condensed Matter
Mark Eriksson
University of Wisconsin-Madison
Apr05
11:00am
Women in Quantum Science and Engineering Lecture Series: Nicole Benedek
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
PQI Event Year of Diversity
Nicole Benedek
Cornell University
Apr06
9:00am
PQI Quantum Day
The PQI Quantum Day will bring Taylor-Allderdice High School students to our campuses to experience a day as a physicist, a chemist, or an engineer!
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Multiple speakers
Apr06
4:30pm
Vinod Menon (The City College of New York)Spring 2017 Seminar
Vinod Menon
The City College of New York
Apr10
4:30pm
Paper and Circuits, Only Atoms Thick
2D layered materials are like paper: they can be colored, stitched, stacked, and folded to form integrated devices with atomic thickness. In this talk, I will discuss how different 2D materials can be grown with distinct electrical and optical properties (coloring), how they can be connected laterally to form pattered circuits (stitching), and how their properties can be controlled by the interlayer rotation (twisting). We will then discuss how these atomically thin papers and circuits..
Spring 2017 Seminar 2D materials
Jiwoong Park
University of Chicago
Apr11
11:00am
Women in Quantum Science and Engineering Lecture Series: Anastassia Alexandrova
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
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Anastassia Alexandrova
University of California, Los Angeles
Apr18
11:00am
Women in Quantum Science and Engineering Lecture Series: Jill Millstone
The PQI Women in Quantum Science and Engineering Lecture Series is held in the framework of the Year of Diversity at Pitt to celebrate women scientists. All talks are colloquium-style and open to the public.
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Jill Millstone
University of Pittsburgh
Apr26
9:00am
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