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TT: Fachverband Tiefe Temperaturen

TT 45: Superconductivity: (General) Theory

TT 45.7: Talk

Wednesday, March 13, 2013, 16:30–16:45, H21

Vacuum phonon squeezing in femtosecond-laser excited noble metals — •Fairoja Cheenicode Kabeer, Eeuwe S. Zijlstra, and Martin E. Garcia — Universität Kassel, Kassel, Germany

The interaction of a femtosecond-laser pulse with a material can either strengthen or weaken the interatomic potential, which may give rise to many interesting ultrafast structural phenomena. Using electronic-temperature dependent density functional theory we demonstrate that the noble metals copper and silver show laser-induced bond hardening and that this can be used to achieve vacuum phonon squeezing. For the squeezed states we predict optimal squeezing factors at the L-point longitudinal mode which are orders of magnitude greater than what has been achieved so far[1].
[1] G. A. Garrett et al., Science 275, 1638 (1997)