HQOC/ITAMP Joint Quantum Sciences Seminar
Wednesday, October 31st * 4:00 PM * Jefferson 250
Guest Presenter: Dr. Alexey Rubtsov, Moscow State University
"Continuous-time Quantum Monte Carlo: at the heart of in silico
modeling of correlated systems"
A description of strongly correlated quantum ensembles remains a
major
challenge for physicists. In particular, electron correlations in
solids are responsible for the magnetism, high-Tc superconductivity,
remarkable optic and transport peculiarities, Kondo physics, etc.
Contemporary analysis of correlated solids employs an
effective-medium
paradigm, so that the description of the entire solid is reduced to
so-called impurity model, describing a single atom (or small cluster
of atoms) placed in a bath. Although there is no general analytical
solution for impurity models, they can be treated numerically, using
Continuous-time Quantum Monte Carlo (CT-QMC) family of algorithms.
These novel methods are based on a stochastic path-integral
calculation for quantum statistical averages. The key ideas and
state-of-art achievements of the CT-QMC methods will be discussed;
examples of specific calculations will be given. We will also touch
an
application of CT-QMC to other systems, in particular to the
ultracold
atom ensembles. Finally, current unresolved issues in the field will
be pointed out.
Student presentation by: David Benjamin
"Microscopic Theory of Resonant Soft x-ray Scattering"
--
Joan Hamilton
Faculty Assistant to Profs. Lukin and Greiner
HQOC Administrative Coordinator
Harvard University
Department of Physics
17 Oxford Street
Cambridge, Ma 02138
Phone 617-496-2544
HUCTW Local Representative for the Department of Physics