2007 APS March Meeting
Volume 52, Number 1
Monday–Friday, March 5–9, 2007;
Denver, Colorado
Session X7: Computational Nonequilibrium Many-body Physics: From Classical to Quantum Simulation
8:00 AM–11:00 AM,
Friday, March 9, 2007
Colorado Convention Center
Room: Korbel 4A-4B
Sponsoring
Unit:
DCOMP
Chair: David Langreth, Rutgers University
Abstract ID: BAPS.2007.MAR.X7.1
Abstract: X7.00001 : Short-time dynamics of correlated quantum Coulomb systems*
8:00 AM–8:36 AM
Preview Abstract
Abstract
Author:
Michael Bonitz
(University Kiel)
Strong correlations in dense Coulomb systems are attracting
increasing interest in many fields ranging from dense
astrophysical plasmas, dusty plasmas and semiconductors to metal
clusters and ultracold trapped ions [1]. Examples are bound
states in dense plasmas (atoms, molecules, clusters) and
semiconductors (excitons, trions, biexcitons) and many-particle
correlations such as Coulomb and Yukawa liquids and crystals.
Of particular current interest is the response of these systems
to short excitations generated e.g. by femtosecond laser pulses
and giving rise to ultrafast relaxation processes and build up of
binary correlations. The proper theoretical tool are
non-Markovian quantum kinetic equations [1,2] which
can be derived from Nonequilibrium Green's Functions (NEGF) and
are now successfully solved numerically for dense plasmas and
semiconductors [3], correlated electrons [4] and other many-body
systems with moderate correlations [5]. This method is well
suited to compute the nonlinear response to strong fields
selfconsistently including many-body effects [6].
Finally, we discuss recent extensions of the NEGF-computations to
the dynamics of strongly correlated Coulomb systems, such as
single atoms and molecules [7] and electron and exciton Wigner
crystals in quantum dots [8,9].
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[1] H. Haug and A.-P. Jauho, {\em Quantum Kinetics in Transport
and Optics of Semiconductors}, Springer 1996; M. Bonitz {\em
Quantum Kinetic Theory}, Teubner, Stuttgart/Leipzig 1998;
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[2] {\em Progress in Nonequilibrium Green's Functions III}, M.
Bonitz and A. Filinov (Eds.), J. Phys. Conf. Ser. vol. 35 (2006);
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[3] M. Bonitz et al. Journal of Physics: Condensed Matter {\bf
8}, 6057 (1996); R. Binder, H.S. K\"ohler, and M. Bonitz, Phys.
Rev. B 55, 5110 (1997);
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[4] N.H. Kwong, and M.~Bonitz, Phys. Rev. Lett. {\bf 84}, 1768
(2000);
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[5] {\em Introduction to Computational Methods for Many-Body
Systems}, M. Bonitz and D. Semkat (eds.), Rinton Press, Princeton
(2006);
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[6] H. Haberland, M. Bonitz, and D. Kremp,
Phys. Rev. E {\bf 64}, 026405 (2001);
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[7] N.E. Dahlen, A. Stan and R. van Leeuwen, p. 324 in Ref. 2.;
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[8] A. Filinov, M. Bonitz, and Yu. Lozovik, Phys. Rev. Lett. {\bf
86}, 3851 (2001);
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[9] K. Balzer, N.E. Dahlen, R. van Leeuwen, and M. Bonitz, to be
published
*Supported by the Deutsche Forschungsgemeinschaft via SFB-TR 24
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.X7.1