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- Max Planck SocietyDE799 papers
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5 papers · 2 filters
Exceptional points and double poles of the S matrix
I. Rotter
Exceptional points and double poles of the S matrix are both characterized by the coalescence of a pair of eigenvalues. In the first case, the coalescence causes a defect of the Hi…
Non-dispersive wave packets in periodically driven quantum systems
Andreas Buchleitner, Dominique Delande, Jakub Zakrzewski
With the exception of the harmonic oscillator, quantum wave-packets usually spread as time evolves. We show here that, using the nonlinear resonance between an internal frequency o…
Decoherence of Semiclassical Wigner Functions
Alfredo M. Ozorio de Almeida
The Lindblad equation governs general markovian evolution of the density operator in an open quantum system. An expression for the rate of change of the Wigner function as a sum of…
Intrinsic decoherence and classical-quantum correspondence in two coupled delta-kicked rotors
Hwa-Kyun Park, Sang Wook Kim
We show that classical-quantum correspondence of center of mass motion in two coupled delta-kicked rotors can be obtained from intrinsic decoherence of the system itself which occu…
On resumming periodic orbits in the spectra of integrable systems
Alfredo M. Ozorio de Almeida, Caio H. Lewenkopf, Steven Tomsovic
Spectral determinants have proven to be valuable tools for resumming the periodic orbits in the Gutzwiller trace formula of chaotic systems. We investigate these tools in the conte…