Events Archive

Silviu Pufu
Fri, Oct 1, 2010, 1:30 pm3:00 pm
Speaker: Silviu Pufu Princeton University Title: Warped throats get excited: Green's functions and normal modes Abstract: Generalized deformed conifolds (Stenzel spaces) are Ricci flat (2d-2)-dimensional manifolds embedded in C^d through the equation \sum_{i = 1}^d z_i^2 = \epsilon^2. In this talk, I will describe how to use the O(d)…
Boris Altshuler, Columbia University "Anderson localization: looking forward"
Thu, Sep 30, 2010, 4:30 pm6:00 pm
Localization of the eigenfunctions of quantum particles in a random potential was discovered by P.W. Anderson more than 50 years ago. In spite of its respectable maturity and rather intensive theoretical and experimental studies this field is by far not exhausted. Anderson localization was originally discovered in connection with spin relaxation…
Eric Carlen
Wed, Sep 29, 2010, 2:00 pm6:00 pm

Noppadol Mekareeya
Tue, Sep 28, 2010, 12:40 pm1:40 pm
Speaker: Noppadol Mekareeya Imperial college, London Title: Chiral Operators on Hypermultiplet Moduli Spaces Abstract: This talk will focus on hypermultiplet moduli spaces of various N=2 supersymmetric gauge theories in (3+1)d. In the first part of the talk, we discuss the moduli space of instantons on C^2. For the classical groups, the…
Aninda Sinha
Mon, Sep 27, 2010, 2:45 pm4:15 pm
Speaker: Aninda Sinha Perimeter Institute Title: c-theorems in Higher Derivative Gravity Abstract: I will discuss c-theorems in the context of AdS/CFT in higher derivative gravity theories. I will focus mainly on D=3 and D=4. I will show that in D=3, demanding the existence of a simple c-function leads to the recently constructed new…
Thomas Jackson
Mon, Sep 27, 2010, 1:15 pm6:00 pm
Title: "Projection Hamiltonians for clustered quantum Hall wavefunctions" Abstract: One of the main measures for determining whether a trial wavefunction for the fractional quantum Hall effect is physically realistic is the properties of an associated projection Hamiltonian, an artificial few-body Hamiltonian constructed so that the given…
Scott Tremaine, IAS "2020 Vision: the Decade Survey in Astronomy and Astrophysics"
Thu, Sep 23, 2010, 4:30 pm6:00 pm
Last month the National Research Council completed a massive two-year project to prioritize major projects and other activities in astronomy and astrophysics for the next decade. I will review the process and results, and how they were influenced by the scientific and political landscape and by the successes and failures of past decade surveys. I…
Brian Batell-" New Stabilization Symmetries for Dark Matter "
Thu, Sep 23, 2010, 2:00 pm3:30 pm
Brian Batell- Perimeter Institute Ontario, Canada

David Kutasov
Mon, Sep 20, 2010, 2:30 pm4:00 pm
Speaker: David Kutasov Affiliation: University of Chicago Title: a-Maximization, Global Symmetries and RG Flows

Andreas Heinrich
Mon, Sep 20, 2010, 1:15 pm6:00 pm
Title: "Measuring the spin dynamics of single atoms with nanosecond time resolution" Abstract:Spin is a fundamental quantity in quantum mechanics. Its manifestations range from the magnet on our fridge to the magnetic-field dependent splitting of a beam of evaporated atoms in the famous Stern-Gerlach experiment. With the advent of spin-based…
William Rubens
Fri, Sep 17, 2010, 1:30 pm3:00 pm
Speaker: William Rubens Imperial college, London Title: The Black Hole / Qubit Correspondence Abstract: We present the evidence for an emerging mathematical correspondence between black holes and qubits. We first introduce the relevant parts of quantum information theory and entanglement theory. We then show how the entropy and…
Patrick Lee, MIT "In Search of Majorana"
Fri, Sep 17, 2010, 1:30 pm6:00 pm
Abstract:Majorana is a fermion which is its own anti-particle. Often described as half a fermion, it is expected to have novel braiding properties in 2D, but has never been observed in Nature. Proposals for realizing them in condensed matter center on making vortices in p+ip superconductors. We have found that the Majorana end states which was…
Physics Freshmen Open House
Wed, Sep 15, 2010, 11:00 am12:00 pm

Leonardo Rastelli
Mon, Sep 13, 2010, 2:45 pm6:00 pm
Speaker: Leonardo Rastelli Prof. at Stony Brook and YITP Title: Integrability of N=2 Superconformal QCD in the Veneziano Limit Abstract: ``The ${\cal N}=2$ SYM theory with gauge group SU(N) and 2N fundamental hypermultiplets (N=2 SuperConformal QCD for short) is perhaps the simplest 4d gauge theory outside the ``universality class'' of …
Developing label-free optical contrast for biomedical imaging
Fri, Aug 20, 2010, 12:00 pm6:00 pm
Speaker: Dan Fu The George R. Harrison Spectroscopy Laboratory Massachusetts Institute of Technology Abstract: Modern microscopy has long been the driving force in tackling biological and biomedical problems. Key innovations in new microscopy technologies are focused on three different aspects: resolution, contrast and speed. Fluorescence…
Host: Thomas Gregor
Condensed Matter Seminar "Metallic conduction and superconductivity in the t-J model: Evolution of the spin states from half filling"
Wed, Aug 11, 2010, 11:00 am6:00 pm
Abstract: Many believe, following Anderson, that the origin of the unusual behavior of cuprate superconductors is related to the physics of the undoped phase. However, this connection has not been established theoretically. I will discuss the properties of a renormalized Hamiltonian derived recently from the t-J model, which is required to…
[TESTING BY SSG] Marc Smiciklas, "A Determination of $\alpha$ Using Precision Measurements of Helium Fine Structure"
Tue, Aug 10, 2010, 3:30 pm4:00 pm
Recently published theoretical predictions by Pachucki and Yerokhin are in good agreement with the most precise measurements of helium fine structure and, for the first time, represent a complete calculation up to and including terms of order $\alpha^7$. In addition to serving as a test of this theory, more precise measurements could also yield…
A Determination of the Fine Structure Constant Using Precision Measurements of Helium Fine Structure
Tue, Aug 10, 2010, 1:00 pm2:00 pm

Recently published theoretical predictions by Pachucki and Yerokhin are in good agreement with the most precise measurements of helium fine structure and, for the first time, represent a complete calculation up to and including terms of order mα7. In addition to serving as a test of this theory, more precise measurements could also yield…
Andreas Wallraff, "Measuring the correlations of a Microwave Frequency Single Photon source"
Wed, Jun 16, 2010, 2:00 pm3:00 pm

ABSTRACT: Circuit quantum electrodynamics (QED) allows for excellent control and measurement of the quantum mechanical properties of qubits, photons and their interactions. As a result, circuit QED is an ideal test bed to investigate the quantum nature of light. In our experiments we prepare a complete family of zero and one photon…

Or Sattath, "A Quantum Lovasz Local Lemma"
Thu, Jun 10, 2010, 12:00 pm1:30 pm

ABSTRACT: The Lovasz Local Lemma is a powerful tool in probability theory to show the existence of combinatorial objects meeting a prescribed collection of ``weakly dependent" criteria. We present a quantum generalization of this result, which replaces probabilities with a weaker notion of relative dimension and allows to lower bound the…