Events Archive


Hamilton Colloquium Series - Mikhail Lukin, Harvard University, "Quantum Dynamics of Strongly Interacting Systems"

Thu, Apr 10, 2014, 4:30 pm to 6:00 pm

We will discuss recent developments at a new scientific interface involving quantum many-body dynamics of strongly interacting systems. Combining advances in several sub-fields of physical science, this research is aimed at realizing new states of matter that can exist far from equilibrium, and exploring novel science and applications of such...

Particle Physics, Yonit Hockberg, "The SIMP miracle"

Wed, Apr 9, 2014, 3:00 pm to 5:00 pm
We present a new paradigm for achieving thermal relic dark matter. The mechanism arises when a nearly secluded dark sector is thermalized with the Standard Model after reheating. The freezeout process is a number-changing 3 \to 2 annihilation of strongly-interacting-massive-particles (SIMPs) in the dark sector, and points to sub-GeV dark matter.

Princeton University Gravity Seminar, "On the non-linear evolution of instabilities of black rings"

Wed, Apr 9, 2014, 2:45 pm to 3:45 pm
Speaker: Pau Figueras (Cambridge)

Princeton University Gravity Seminar, "Conserved quantities of gravity"

Wed, Apr 9, 2014, 1:30 pm to 2:30 pm
Speaker: Mu-Tao Wang (Columbia) Abstract: I shall discuss the notion of conserved quantities, including mass, energy, linear momentum, angular momentum, and center of mass at both the quasi-local and total level (for isolated systems).

Math Physics Seminar, Saidakhmat Lakaev, "Threshold effects of the two and three-particle Schroedinger operators on lattices"

Tue, Apr 8, 2014, 4:30 pm to 5:30 pm
Efimov's effect for a system of three particles moving on three-dimensional lattice and interacting via pairwise short-range potentials is studied. The following new results will be presented:

High Energy Theory Seminar - Allan Adams, MIT "TBA"

Condensed Matter Seminar, Eun-Ah Kim, “Superconducting proximity effect in topological metals"

Mon, Apr 7, 2014, 1:15 pm to 2:30 pm
Much interest in the superconducting proximity effect in 3D topological insulators (TIs) has been driven by the potential to induce exotic Majorana bound states. Most candidate materials for 3D TI, however, are bulk metals, with bulk states at the Fermi level coexisting with well-defined surface states exhibiting spin-momentum locking.

Biophysics Seminar Series - Karen Kasza (Sloan Kettering) "Spatiotemporal control of the forces that shape tissues"

Mon, Apr 7, 2014, 12:00 pm to 1:00 pm
During embryonic development, the forces generated by myosin II must be controlled in space and time to shape simple epithelia into tissues and organs with complex form and structure.

High Energy Theory Seminar - Roberto Bonezzi, University of Bologna, Italy - "Higher Spins on (A)dS in the worldline formalism"

Fri, Apr 4, 2014, 1:30 pm to 2:45 pm
"In this talk I study the one loop effective action for a class of higher spin fields by using a first-quantized description. The latter is obtained by considering spinning particles, characterized by an extended local supersymmetry on the worldline.

Gravity Group Astrophysics|Cosmology Lunch: Renee Hlozek, "Planck Data Reconsidered"

Fri, Apr 4, 2014, 12:00 pm to 1:30 pm
We re-analyze the Planck data and find that the 217GHz x 217GHz detector set spectrum used in the Planck analysis is responsible for some of the tension between the Planck parameters and other astronomical measurements.

Hamilton Lecture - Samuel Ting, MIT, "The Latest Results from the Alpha Magnetic Spectrometer on the International Space Station"

Thu, Apr 3, 2014, 8:00 pm to 9:30 pm

The Alpha Magnetic Spectrometer (AMS) is a multipurpose particle physics detector that was installed on the International Space Station in May 2011. More than 50 billion cosmic ray events have been collected. The latest findings will be presented.

Quantum Sciences Seminar Series - Guido Burkard, University of Konstanz, Germany - "Spin Qubits in Carbon"

Wed, Apr 2, 2014, 1:00 pm to 2:00 pm

Graphene and carbon nanotubes have emerged as interesting new materials for electronics. But carbon is also a unique element for spintronics, and in particular for spin-based quantum information processing [1], because the low concentration of nuclear spins in natural carbon allows for long electron spin coherence times.

High Energy Theory Seminar- IAS - Scott Thomas, Rutgers - “Implications of Inflationary Gravity Waves for the QCD Axion”

Biophysics Seminar Series - David Nelson (Harvard) "Range Expansions of Microorganisms in Structured Environments"

Mon, Mar 31, 2014, 12:00 pm to 1:00 pm
Biological organisms in the real world do not typically grow up in well-mixed test tubes or featureless Petri dishes, but instead must find ways to prosper in the presence of environmental inhomogeneities that vary in space.

High Energy Theory Seminar- IAS - Simon Caron-Huot, IAS/Copenhagen - “Regge Theory: Old and New”

Fri, Mar 28, 2014, 1:30 pm to 2:30 pm
Regge theory is the idea that physical observable in quantum theory can be defined for complex angular momentum.Its main result is the possibility to analyze an amplitude in one channel, in terms of the states exchanged in another channel, in regimes where the corresponding partial wave expansion would otherwise diverge.

Special Seminar - Matthias Troyer, ETH, Zurich: "Interacting Anyons in Topological Quantum Liquids: Variations on the 'golden chain' "

Fri, Mar 28, 2014, 1:30 pm to 2:30 pm
We discuss generalizations of fermionic quantum lattice models using anyonic degrees of freedom. The simplest model for interacting anyons, the “golden chain” energetically favors neighboring localized anyons to fuse into the trivial channel, similar to the quantum Heisenberg model favoring neighboring spins to form spin singlets.

Hamilton Colloquium Series - Matthias Troyer, ETH Zurich: "Validating Quantum Devices"

Thu, Mar 27, 2014, 4:30 pm to 6:00 pm
About a century after the development of quantum mechanics we have now reached an exciting time where non-trivial devices that make use of quantum effects can be built.

Special Seminar - Tobias Tiecke, Harvard University, "Nanoscale cavity QED with a single trapped atom"

Wed, Mar 26, 2014, 2:00 pm to 3:00 pm
Hybrid quantum devices, in which dissimilar quantum systems are combined in order to attain qualities not available with either system alone, may enable far-reaching control in quantum measurement, sensing, and information processing.

Math Physics Seminar, Benjamin Schlein, "From BCS-theory to the Gross-Pitaevskii equation for the evolution of dilute fermion pairs"

Tue, Mar 25, 2014, 4:30 pm to 6:00 pm
We consider a system of fermions interacting through a potential admitting a bound state in the low density limit. Assuming the energy to be sufficiently small, we show that particles form pairs, exhibiting Bose-Einstein condensation and evolving according to the time-dependent Gross-Pitaevskii equation.

High Energy Theory Seminar - Marina Huerta, Centro Atomico Bariloche - "TBA"