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Physics Event · · ·

Physics Colloquium: Marco Polini, Scuola Normale, Pisa, Italy

Date and Time: Wednesday, October 17, 2012 at 4:15 PM (CDT)
Location: RLM 4.102

Physics Colloquium

Marco Polini, NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy

"Hot carriers in graphene: a table-top 'quark-gluon soup'"

4:15pm, The John A. Wheeler Lecture Hall (RLM 4.102)

Coffee and cookies will be served at 4:00pm in RLM 4.102

Host: Prof. MacDonald


Theories of the evolution of the Universe after the Big Bang address a profound non-equilibrium problem which, in its early stages, involves an asymptotically free plasma of quarks and gluons. In this Colloquium, I will discuss some similarities and differences between the quark-gluon plasma (QGP) in early universe cosmology and a solid-state analogue created1 by shining laser light on a two-dimensional (2D) crystal of Carbon atoms: graphene. The interaction of light with graphene creates a highly non-equilibrium distribution of fermions, which are described by an ultrarelativistic 2D Dirac equation. These “hot” massless Dirac fermions interact both among themselves via the Coulomb force, and with a bath of bosons, the quantized lattice vibrations of the 2D crystal. I will demonstrate that the very early stages of the non-equilibrium dynamics of the graphene QGP are entirely controlled by carrier-carrier collinear Coulomb scattering processes including “carrier multiplication”. This effect could lead to improved photovoltaic and photodetector devices.


1D. Brida, A. Tomadin, C. Manzoni, Y.J. Kim, A. Lombardo, S. Milana, R.R. Nair, K.S. Novoselov, A.C. Ferrari, G. Cerullo, and M. Polini, Ultrafast collinear scattering and carrier multiplication in graphene, arXiv:1209.5729v1.

October 21 12:30 RLM 11.204
Challenging the Church-Turing Thesis: Quantum Computing and Classical Entanglement
October 21 14:00 RLM 7.104
Spin and Long-Range Forces: The Unfinished Tale of the Last Massless Particle
October 21 17:00 RLM 7.104
Universality in Pattern Formation!
October 22 12:00 RLM 8.136
Topics of interest to physicists and mathematicians
October 22 16:15 The John A. Wheeler Lecture Hall (RLM 4.102)
Mechanics of Soft Matter, Living and Dead
October 23 12:30 RLM 9.222
Members of the Theory Group discuss their work
October 23 12:30 RLM 11.204
Probing Electronic Structures of Emerging 2D Materials Beyond Graphene
October 23 14:00 RLM 9.222
Lepton-Flavored Asymmetric Dark Matter and Interference in Direct Detection
October 24 16:00 RLM 5.104
Compact Tunable Compton X-ray Source from Laser Wakefield Accelerator and Plasma Mirror
October 29 16:15 The John A. Wheeler Lecture Hall (RLM 4.102)
Colliding Worlds: How Cutting-Edge Science is Redefining Contemporary Art
November 3 13:00 RLM 11.204
Tips on Writing Papers
November 5 16:15 The John A. Wheeler Lecture Hall (RLM 4.102)
title tbd