Events Archive

Special Seminar

Particle Physics Seminar, Francesco D'Eramo, "Anomaly Mediation from Unbroken Supergravity"

Wed, Apr 16, 2014, 3:00 pm to 5:00 pm
In this talk I will show how the sparticle soft masses generated by anomaly mediation, proportional to the gravitino mass, should be associated to unbroken supersymmetry (SUSY). This counterintuitive result arises because the underlying symmetry structure of (broken) supergravity in flat space is in fact (unbroken) SUSY in anti-de Sitter space.

Special Seminar - A quantum computational perspective on quantum physics - Dorit Aharonov, Hebrew University

Fri, Apr 11, 2014, 2:45 pm to 3:45 pm
Quantum computation has taught us that quantum many body systems can be viewed from a computational perspective. This approach to studying quantum systems turns out to lead to a remarkably rich set of insights, ideas and directions to explore. I will try to give a taste of the main achievements in this vibrant fast growing area over the past...

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.

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.

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.

Special seminar - Hiroyuki Inoue, Weizmann Institute: "Collective Neutral Modes in Quantum Hall Regimes"

Fri, Mar 21, 2014, 11:00 am to 12:30 pm
The integer and fractional quantum Hall effects (IQHE and FQHE) are canonical examples of 2D topological phases. Being incompressible liquid in the bulk, available low-energy propagating excitations are only at the edge: gapless chiral edge channels. The excitations therein are electrons in the IQHEs and fractional quasiparticles in the FQHEs.

Special seminar - Yue Cao, University of Colorado: "Deciphering the Spin-Orbital Coupled Wavefunction"

Thu, Mar 20, 2014, 12:00 pm to 1:30 pm
Understanding the structure of the wavefunction is essential for depicting the surface states of a topological insulator.

Special seminar - Fereshte Ghahari, Columbia University, "Transport and Thermoelectric Studies of Correlated Phenomena in Graphene"

Fri, Mar 14, 2014, 1:30 pm to 2:30 pm
The observation of correlated electron physics in graphene is mostly limited by strong electron scattering that is caused by charge impurities.

Special Seminar - Physical forces shaping morphology - Karen Alim, Harvard

Wed, Mar 12, 2014, 2:00 pm to 3:00 pm
Physical forces can induce long-ranged interactions and thus propagate information on large scales. Especially during the development of an organism, coordination on large scales in short time is essential.

Quantum Sciences Seminar Series - Jérémie Viennot, ENS Paris, "Out of equilibrium charge dynamics in a cQED architecture"

Tue, Mar 11, 2014, 1:00 pm to 2:00 pm

In the context of circuit quantum electrodynamics, recent developments made it possible to build hybrid circuits [1], including many types of quantum dots. The versatility of these systems allows us to explore several directions, from quantum information engineering to many-body physics, all in a circuit QED architecture.

Special Seminar - "Fundamental Limits Governing Protein Folding and Function" - Milo Miaoyu Lin, Berkeley

Special Seminar - Quantum phase transitions in 2d metals: non-Fermi-liquid behavior and superconductivity, Max Metlitski, Kavil Institute, USCB

Tue, Feb 18, 2014, 9:30 am to 10:30 am
: A central question of modern condensed matter physics is how can our standard description of metals, the Landau Fermi-liquid theory, breakdown. In this light, quantum phase transitions associated with onset of order in metals have attracted much interest.

Special Seminar - The Dark Energy Survey early science and perspectives, Marcelle-Soare-Santos, Fermi Lab

Mon, Feb 17, 2014, 4:00 pm to 5:00 pm
The Dark Energy Survey (DES) Collaboration has started a 5000 square degree imaging survey of the southern galactic cap using a new 3 sq. deg., 520 Megapixel CCD camera, the Dark Energy Camera (DECam), mounted on the Blanco 4-meter telescope at the Cerro-Tololo Inter-American Observatory in Chile. DECam has achieved first-light in September 2012.

Special Seminar - Symmetry Protected Topological Phases: Prediction, Construction, and Classification - Xie Chen

Thu, Feb 6, 2014, 2:00 pm to 3:00 pm
Topological insulators, with their gapless conducting edges around a gapped insulating bulk, represent a new form of matter. While their topological nature is usually attributed to free electrons filling a topological band structure, it is highly desirable to understand whether similar topological phenomena exist more generally in interacting...

Special Seminar - Quantum simulation using cold atoms and a “brighter” future - Chen-Lung Hung, Caltech

Tue, Feb 4, 2014, 1:30 pm to 2:30 pm
Advances of quantum control in atomic and optical physics have made it possible to study intriguing phenomena originally discussed in condensed matter, nuclear, and gravitational physics. In quantum gas experiments, new insights are derived from out-of-equilibrium dynamics of novel quantum many-body phases.

Quantum Sciences Seminar Series - Yuimaru Kubo, CEA-Saclay – “Hybrid Quantum Circuit with a Superconducting Qubit and an Electron Spin Ensemble”

Wed, Dec 11, 2013, 12:30 pm to 1:30 pm

We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins (Fig. a). The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy (NV) centers in a diamond crystal via a frequency-tunable superconducting resonator acting...

Quantum Sciences Seminar - Christopher Eichler, ETH Zurich - "Exploring quantum microwave radiation emitted from superconducting electronic circuits."

Tue, Dec 10, 2013, 1:00 pm to 2:00 pm

Superconducting electronic circuits have turned into one of the prime physical systems to investigate quantum optical and atomic physics phenomena in engineered solid state devices.

Special Seminar - Lisa Randall - Professor, Harvard University

Tue, Nov 12, 2013, 2:00 pm to Wed, Nov 6, 2013, 3:00 pm

Special Seminar - Double Disk Dark Matter - Lisa Randall - Professor, Harvard University

Special Seminar: Conservation laws for the wave equation on null hypersurfaces - Stefanos Aretakis