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Physics Conference Room, SB B326
Coffee starts at 12:00 PM and talk starts at 12:15 PM
Sep '14
Mark Hillery  -  Monday, September 8, 2014
ABSTRACT: Quantum optics arose with the invention of the laser.  Early work focussed on developing a quantum theory of the laser and on better understanding the nature of the quantized electromagnetic field.  It was for this latter work that Roy Glauber won the 2005 Nobel Prize in Physics.  The fields produced by nonlinear optical devices also received attention, because of their unusual correlation properties.  In the 1980's two major areas of study were quantum metrology, using nonclassical states of the electromagnetic field to improve the accuracy of measurements, and micromasers and microlasers, optical devices that are pumped by a single atom at a time.  In the 1990's the field split into three parts.  Some researchers turned their attention to the study of Bose-Einstein condensates and related phenomena in matter-wave physics.  Another group pursued the newly emerging field of quantum information, while a third continued with work on mainstream quantum optics.  Today all of these efforts are alive and doing very well, and they have been joined more recently by the study of quantum opto-mechanics.  A broad overview of these trends will be presented as well as more detailed discussions of some selected topics.
Sep '14
Yaron Bromberg  -  Monday, September 22, 2014
Sep '14
Alexei Tsvelik  -  Monday, September 29, 2014
Strongly correlated systems in low dimensions
Brookhaven National Laboratory
ABSTRACT: I review such aspects of low-D physics as quantum number fractionalization, non-Fermi liquid behavior, and spontaneous mass generation.
Oct '14
Lam Hua  -  Monday, October 6, 2014
ABSTRACT: We will discuss the role of symmetries in three different areas of large scale structure: 1. how to test the equivalence principle using black holes in centers of galaxies; 2. how to measure gravitational redshift on cosmological scales using parity-violating signatures in correlation functions; 3. how spontaneously broken symmetries give us non-perturbative relations between different correlation functions. The first two items are fairly easy to understand, the third is a bit more technical. Can you give me an idea of the composition of the audience? What fraction will be faculty versus students?
And what fraction will be high energy or astro-physics versus condensed matter? 
Oct '14
Sergei Dubovsky  -  Monday, October 20, 2014
ABSTRACT: Advances in X-ray astronomy open the possibility for high precision spin and mass determination for astrophysical black holes starting the era of precision black hole physics. These observations turn astrophysical black holes into sensitive probes of ultra-light axion-like particles motivated by the strong CP problem and string theory.
 When the axion Compton wavelength matches the black hole size, the axions develop "superradiant" atomic bound states around the black hole "nucleus" through the Penrose superradiance process. Their occupation number grows exponentially by extracting rotational energy from the ergosphere, culminating in a rotating Bose-Einstein axion condensate emitting gravitational waves. This transfer of angular momentum from the black hole to the axion condensate results in mass gaps in the spectrum of rapidly rotating black holes and gives rise to distinctive gravity wave signals. 
Oct '14
Lea Ferreira dos Santos  -  Monday, October 27, 2014
ABSTRACT: We consider one-dimensional isolated interacting quantum systems that are taken out of equilibrium instantaneously. Three aspects are addressed: (i) the relaxation process, (ii) the size of the temporal fluctuations after relaxation, (iii) the conditions to reach thermal equilibrium. The relaxation process and the size of the fluctuations depend on the interplay between the initial state and the Hamiltonian after the perturbation, rather than on the regime of the system. They may be very similar for both chaotic and integrable systems. The general picture associating chaos with the onset of thermalization is also further elaborated. It is argued that thermalization may not occur in the chaotic regime if the energy of the initial state is close to the edges of the spectrum, and it may occur in integrable systems provided the initial state is sufficiently delocalized.
Nov '14
Miriam Rafailovich  -  Monday, November 3, 2014
SUNY Stony Brook
Nov '14
Premala Chandra  -  Monday, November 10, 2014
Nov '14
Andrii Golovin  -  Monday, November 24, 2014
ABSTRACT: Metamaterials with properties that vary from point to point in space and time are suitable for new applications such as an “optical cloak”.  Colloidal dispersions of metal nano-rods in dielectric fluids are appropriate to construct such spatially varying and electrically reconfigurable optical metamaterials.  An applied electric field can be used to control the orientation and concentration of nano-rods, and thus modulate the optical properties of the dispersion.  For example, by using gold nano-rods dispersed in toluene, we demonstrate an electrically induced change in refractive index on the order of 0.1 which was used to change the visibility of metal object.  This approach is also valid to design an omnidirectional broadband optical “black-hole”.