Upcoming Seminars and Colloquia
Date: Tuesday, May 29, 2012 - Tuesday, May 29, 2012, 10:30-12:00 Joint Seminar Title: “INTRODUCTION TO INTEGRABILITY IN ADS/CFT” Lecturer: RAFAEL NEPOMECHIE
UNIVERSITY OF MIAMILocation: Neve Shalom 10:20 Gathering and coffee Abstract: Integrability has already led to remarkable explicit results in planar AdS5/CFT4, and holds the promise for more. I shall review some of these developments, starting from the initial evidence of integrability at weak coupling, followed by the all-loop S-matrix, and its implications for large and small operators. Time permitting, I shall present some of my own recent work on integrable twists in AdS/CFT.
Date: Tuesday, May 29, 2012 - Tuesday, May 29, 2012, 12:00-13:30 Joint Seminar Title: "THE QUARK-ANTIQUARK POTENTIAL IN N=4 SYM" Lecturer: NADAV DRUKKER
KINGS COLLEGE LONDONAbstract: I will explain how to use integrability to calculate the quark-antiquark potential in planar N=4 SYM, i.e., the infinite rectangular Wilson loop operator. It turns out that to formulate and solve the problem it is natural to consider much more general observables: cusped Wilson loops and Wilson loops with operator insertions. A rather laborious calculation which I will outline leads to a set of integral equations which can be solved iteratively (and presumably also numerically) to give the planar potential and its generalizations to arbitrary precision.
Date: Tuesday, May 29, 2012, 16:00 Title: Science and Art of Fluid and Wave Motion: From Leonardo da Vinci to contemporary kinetic-fluid artists Lecturer: Norman Zabusky
Physics of Complex SystemsLocation: Wolfson Abstract: Contemporary artistic realizations elicit interest and excitement by controlling and projecting evolving coherent and chaotic patterns in varying space and time domains. Stemists ( STEM* people ) research to quantify and model and understand the underlying physics, chemistry and biology of the associated fluid and wave motions.
Historically, Leonardo da Vinci (1452 –1519,) the Renaissance man ( i.e.sketcher, painter, sculptor, scientist, engineer, inventor, anatomist, writer and more) was the first to sketch and paint images across STEM disciplines. His deep appreciation of vortex-and-turbulence fluid dynamics in diverse fluid environments is uncanny and he may be considered the "father" of flow visualization.
I will illustrate the approach of artists from the 19th-21st centuries who are intrigued by flow and stemists researching fundamental and technological fluid processes. Stemists regularly apply visualization-and-quantification ( "visiometric" [1] ) modes to explore ever-increasing amounts of data from laboratory experiment, remote observation and numerical simulation. The beauty resides in the ability of direct and projected colored images, animations and installations to: reveal truth; experience joy through understanding; and inspire viewers ( particularly youth, and including their educational process ).
Two of many forward looking contemporary fluid-kinetic artists include:
• Shinichi Maruyama , high-speed kinetic-fluid experimenter and photographer at http://shinichimaruyama.com/.
• Ned Kahn, at http://nedkahn.com.
Ned's many pioneering “… artworks frequently incorporate flowing water, fog, sand and light to create complex and continually changing systems. …I am intrigued with the way patterns can emerge when things flow… they are patterns of behavior - recurring themes in nature" ( from his 2003 MacArthur Award talk at his URL given above).
His works have been increasingly well-received around the world, most recently at Singapore's magnificent Marina Bay Sands urban forum and living center. Here we have the first major embedded "ArtScience" museum and three of Kahn's large kinetic-fluid installations:
• "Wind Arbor" where a centrally located wind-driven vertical wall, exhibits randomly changing patterns;
• "Rain Oculus", where a large swirling whirlpool at street level falls thru an indented circular hole;
• "Tipping Wall" where water at the top falls onto rows of mounted and pivoting rectangular plates and causes them to engage in a dance of chaotic oscillations .
These words hardly convey the unusual imagery and sounds to be seen in situ or in videos of these fluid dynamical environments [2].
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* Stemist: A practitioner from Science, Technology , Engineering or Mathematics who uses contemporary visualization and quantification techniques to enhance and communicate their work.
========================REFS for May 29 2012===============
[1]. "DAVID and Visiometrics: Visualizing and quantifying evolving amorphous objects" F.J. Bitz and N.J. Zabusky, Computers in Physics, Nov/Dec 1990 (603-614). Also,
"Visiometrics, Juxtaposition and Modeling". Norman J. Zabusky, Deborah Silver, Richard Pelz, and Vizgroup. Physics Today. 46, Issue 3, March 1993, p. 24, h
[2]. "Wind Arbor, Rain Oculus and Tipping Wall:The Art of Ned Kahn at Marina Bay Sands, Singapore" . Video narrated by chief-architect, Moshe_Safdie http://www.youtube.com/watch?v=lVwS7reOhX8&feature=player_embedded.
Date: Thursday, May 31, 2012, 11:00-12:30 Colloquium Title: Time-Reversal-Symmetry-Breaking in Unconventional Superconductors Lecturer: Aharon Kapitulnik
StanfordLocation: Weissman-Physics, Auditorium 11:00- Coffee,tea and more Abstract: BCS theory of conventional superconductivity is based on pairing of each electron state with its exact time reverse, resulting in a coherent condensate of spin singlet pairs, which is insensitive to non-magnetic scattering (Anderson theorem). Such superconductors are characterized by an order parameter which breaks U(1)-gauge symmetry leading to the basic properties, such as the Meissner effect, persistent current and flux quantization. By contrast, unconventional superconductors exhibit additional broken symmetries, which often lead to distinctive superconducting phases with unique properties. Of particular interest to us is the breakdown of time reversal symmetry which involves magnetism and is predicted to exhibit some anomalous properties in the normal state above Tc as well as in the superconducting state. In this talk we will also introduce a novel apparatus that we have built to allow for the high resolution optical measurements sensitive to time reversal symmetry breaking, followed by results on several superconducting systems as well as the pseudogap state in high-temperature superconductors.
Date: Thursday, June 07, 2012 - Thursday, June 07, 2012, 11:15-12:30 Colloquium Title: TBA Lecturer: Helmut Zacharias
Dep. of Physics, Munster University, GermanyLocation: Weissman-Physics, Auditorium
Date: Thursday, June 14, 2012 - Thursday, June 14, 2012, 11:15-12:30 Colloquium Title: TBA Lecturer: Dan Stamper- Kurn
BerkeleyLocation: Weissman-Physics, Auditorium
Date: Tuesday, June 19, 2012, 10:00 Title: Using Network Algorithms to Integrate "Omic" Data and Reveal Disease Mechanisms Lecturer: Ernest Fraenkel
Massachusetts Institute of TechnologyLocation: Belfer, Botnar Auditorium Abstract: Proteomic technologies, next-generation sequencing and RNAi screens are providing increasingly detailed descriptions of the molecular changes that occur in diseases. However, it is difficult to assemble these data into a coherent picture that could lead to new therapeutic insights for several reasons. Despite their power, each of these methods still only captures a small fraction of the cellular response. Moreover, when different assays are applied to the same problem, they often provide apparently conflicting answers. We have developed powerful new approaches to integrate these data to identify small, functionally coherent networks that underlie cellular behavior. I will show that these methods suggest novel therapeutic strategies for the brain tumor glioblastoma multiforme.
Date: Thursday, June 21, 2012 - Thursday, June 21, 2012, 11:15-12:30 Colloquium Title: TBA Lecturer: Oded Aharonson
Weizmann Institute of ScienceLocation: Weissman-Physics, Auditorium
Date: Thursday, June 28, 2012 - Thursday, June 28, 2012, 11:15-12:30 Colloquium Title: TBA Lecturer: TBA Location: Weissman-Physics, Auditorium