Special Condensed Matter Seminar - Peng Cai, Tsinghua University, "Electronic Structure Evolution of Lightly Doped Cuprates Revealed by STM"
Sep 22, 2014 · 1:15 p.m.– 2:15 p.m. · PCTS Seminar Room
One of the key issues regarding the cuprate high temperature superconductors is the evolution of the electronic structure when charge carriers are doped into the parent Mott insulator. We have performed scanning tunneling microscopy studies on the parent Ca2CuO2Cl2 Mott insulator and severely underdoped Bi2Sr2-xLaxCuO6 in the antiferromagnetic insulating state. The large energy window covered by the tunneling spectroscopy allows us to simultaneously capture the features of the full charge transfer gap and the low energy electronic state at the atomic scale. We show that with increasing hole doping, the high energy spectral weight of the upper Hubbard band is systematically transferred to the low energy electronic states within the charge transfer gap. When sufficient amount of holes are introduced, a V-shaped energy gap forms near the Fermi level and in the meantime a short-range charge ordering emerges. The implications of these results on the pseudogap phase and charge density order in the cuprates will be discussed.
Sep 22, 2014 · 2:30 p.m.– 3:30 p.m. · PCTS Seminar Room
I will discuss various aspects of non-relativistic field theories on a curved, background spacetime. First things first, we need to know what sort of geometry these theories couple to, as well as the symmetries we ought to impose. I will argue that Galilean-invariant theories should be coupled to a form of Newton-Cartan geometry in which one enforces a one-form shift symmetry, which amounts to a covariant version of invariance under Galilean boosts. I will focus on two main applications of this result, namely consequences of these symmetries at nonzero temperature and an introductory analysis of ’t Hooft anomalies.
Sep 23, 2014 · 4:30 p.m.– 5:30 p.m. · Jadwin 343
High Energy Theory Seminar- IAS - Steve Adler, IAS - “SU(8) Family Unification with Boson-fermion Balance”
Sep 26, 2014 · 1:30 p.m.– 2:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Sep 26, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111
High Energy Theory Seminar- IAS - Anton Kapustin, Caltech; Simons Center for Geometry and Physics, Stony Brook, TBA
Sep 29, 2014 · 2:30 p.m.– 3:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Hamilton Colloquium Series- David Huse, Princeton University, "Quantum thermalization, many-body Anderson localization, and the entanglement frontier"
Oct 2, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin A10
Progress in physics and quantum information science motivates much recent study of the behavior of extensively-entangled many-body quantum systems fully isolated from their environment, and thus undergoing unitary time evolution. What does it mean for such a system to go to thermal equilibrium? I will explain the Eigenstate Thermalization Hypothesis (ETH), which posits that each individual exact eigenstate of the system's Hamiltonian is at thermal equilibrium, and which appears to be true for most (but not all) quantum many-body systems. Prominent among the systems that do not obey this hypothesis are quantum systems that are many-body Anderson localized and thus do not constitute a reservoir that can thermalize itself. When the ETH is true, one can do standard statistical mechanics using the ‘single-eigenstate ensembles’, which are the limit of the microcanonical ensemble where the ‘energy window’ contains only a single many-body eigenstate. These eigenstate ensembles are more powerful than the traditional statistical mechanical ensembles, in that they can also “see” the quantum phase transition in to the localized phase, as well as a rich new world of phases and quantum phase transitions within the localized phase.
High Energy Theory Seminar- IAS - Takemichi Okui, Florida State U. - “An Explanation of the WW Excess at the LHC by Jet-veto (and pi^2) Resummation
Oct 3, 2014 · 1:30 p.m.– 2:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Oct 3, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111
High Energy Theory Seminar- Mirjam Cvetic, U. of Pennsylvania, "Non-extremal Black Holes and Conformal Invariance"
Oct 6, 2014 · 2:30 p.m.– 3:30 p.m. · PCTS Seminar Room
Hamilton Colloquium Series- Leslie Rosenberg, University of Washington, "Searching for Dark-Matter Axions"
Oct 9, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin 111
The axion is a hypothetical elementary particle whose existence would explain the baffling absence of CP violation in strong interactions. Axions also happen to be a compelling dark-matter candidate. Even if dark-matter axions were to comprise the overwhelming majority of mass in the universe, they would be extraordinarily difficult to detect. However, several experiments, either under construction or taking data, would be sensitive to even the more pessimistically coupled axions. This talk describes the current state of these searches.
Oct 10, 2014 · 1:45 p.m.– 2:30 p.m. · TBD
Oct 10, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111
Oct 13, 2014 · 2:30 p.m.– 3:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Hamilton Colloquium Series - Michael Gordin, Dept. of History, Princeton, "“Einstein in Bohemia: Not-So-General Relativity, 1911-1912”"
Oct 16, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin A10
In the spring of 1911, Albert Einstein moved from Zurich to the German University in Prague, taking up his first appointment as a full professor. Heavily on his mind was a project to extend the special theory of relativity (1905) to a general theory of relativity, building from his 1907 inspiration on the equivalence of inertial and gravitational mass. It was only after his arrival in the Bohemian capital — then the third city of Austria-Hungary and torn between nationalist Czechs and the dwindling German-speaking minority — that Einstein’s attention could shift almost entirely to gravitation. His progress, however, was limited and frustrating, yielding in the end a static theory that has been typically dismissed as a wrong turn on the path to his famous field equations of 1915. Prague was equally vexing: both Einstein and his family disliked it, and they moved back to Zurich in 1912. This talk focuses on Einstein’s overlooked Prague year to argue for the centrality of both the context and the static theory in the future of Einstein’s scientific career.
Oct 23, 2014 · 3:00 p.m.– 4:00 p.m. · Jadwin 111
Oct 27, 2014 · 2:30 p.m.– 3:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Nov 3, 2014 · 2:30 p.m.– 3:30 p.m. · PCTS Seminar Room
Nov 6, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin A10
Nov 7, 2014 · 4:00 p.m.– 5:00 p.m. · 87 Prospect
Nov 13, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin A10
Nov 14, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111
Nov 17, 2014 · 2:30 p.m.– 3:30 p.m. · PCTS Seminar Room
Hamilton Colloquium Series - Hardy Gross, Max Planck Institute of Microstructure Physics, Germany, "Title: TBA"
Nov 20, 2014 · 4:30 p.m.– 6:00 p.m. · Jadwin A10
Nov 21, 2014 · 1:45 p.m.– 2:30 p.m. · Jadwin A08
Particle Physics Seminar, Yoni Kahn, MIT, "Halo-independent methods for emerging dark matter signals"
Nov 21, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111
The increasingly constraining null results of the LUX, XENON, and CDMS direct-detection experiments suggest that any future dark matter signal will begin with a trickle of events, rather than a flood. I will describe methods for analyzing direct-detection experiments which are independent of the velocity distribution of the dark matter halo, and which are particularly well-suited to sparsely distributed events at experiments with excellent energy resolution.
Nov 24, 2014 · 2:30 p.m.– 3:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Dec 1, 2014 · 2:30 p.m.– 3:30 p.m. · PCTS Seminar Room
Dec 8, 2014 · 1:15 p.m.– 2:30 p.m. · PCTS Seminar Room
Dec 8, 2014 · 2:30 p.m.– 3:30 p.m. · Bloomberg Lecture Hall - Institute for Advanced Study
Dec 12, 2014 · 1:45 p.m.– 2:30 p.m. · TBD
Dec 12, 2014 · 4:00 p.m.– 5:00 p.m. · Jadwin 111