Author(s): Guido R. Mocken, Matthias Ruf, Carsten Müller, and Christoph H. Keitel
A detailed analysis of electron-positron–pair creation from vacuum in counterpropagating laser pulses is presented. Our particular interest lies in the nonperturbative multiphoton regime of interaction in different frequency domains. The pair creation may proceed both resonantly and nonresonantly …
[Phys. Rev. A 81, 022122] Published Thu Feb 25, 2010
Fundamental concepts
Nonperturbative multiphoton electron-positron–pair creation in laser fields
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Dissipative two-level system under strong ac driving: A combination of Floquet and Van Vleck perturbation theory
Author(s): Johannes Hausinger and Milena Grifoni
We study the dissipative dynamics of a two-level system (TLS) exposed to strong ac driving. By combining Floquet theory with Van Vleck perturbation theory in the TLS tunneling matrix element, we diagonalize the time-dependent Hamiltonian and provide corrections to the renormalized Rabi frequency of …
[Phys. Rev. A 81, 022117] Published Mon Feb 22, 2010
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