University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Monday, October 13th 2014
1:00 pm:
CM Journal Club in 210 Tate
Speaker: Brent Perreault
Subject: Quantum Quench at the X-ray Edge

A quantum quench occurs when we take a system in an eigenstate of H_0 and instantly change the Hamiltonian, then allowing it to evolve in time. In the X-ray Edge problem [1] we remove a deep electron from one molecule in the lattice on a system in its ground state. I will review this classic problem, its solution - pioneered by Nozieres et al. [2] - and its relation to dynamics in Kitaev spin liquids [3].
[1] Mahan, Phys Rev 163, 612 (1967)
[2] Nozieres & Dominicis, Phys Rev 178, 1097 (1969)
[3] Knolle et al. PRL 112, 207203 (2014)

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