Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 44: Quantum Chaos (joint session DY/TT)

TT 44.14: Vortrag

Mittwoch, 18. März 2020, 18:45–19:00, HÜL 186

Rate of decoherence and entanglement growth in coupled kicked rotors — •Sanku Paul1 and Arnd Bäcker2,11Max-Planck-Institut für Physik komplexer Systeme, Dresden 01187, Germany — 2Technische Universität Dresden, Institut für Theoretische Physik, Dresden 01069, Germany

The classical-quantum correspondence of a pair of coupled kicked rotors is investigated. In this interacting system, one rotor acts as an environment to the other. This leads to the emergence of decoherence with classical-like behavior at large times. This classical-like behavior is characterized by normal diffusion in energy space and interestingly, it is preceded by an intermediate dynamical localization for weak interactions. It is observed that these different rates of energy diffusion are associated with different regimes of decay of coherence, in particular showing exponential and power-law behavior. We show that the observed decoherence is related to distinct rates of entanglement entropy growth between the rotors which is described by an initial power-law followed by logarithmic growth.

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