The Quantum Chaos Group 

Highlights  
Dynamics of condensed particles in a few site system ()
The physics of
The time dependent dynamics in a Bosonic Josephson junction with no driving can be regarded as a quantum version of a pendulum. Adding driving to this system, we have studied the adiabaticdiabaticsudden crossover of the manybody LandauZener dynamics; the Kapitza pendulum dynamics; and the Quantum Zeno dynamics due to erratic driving. In particular we have studied the stabilization and the suppression of collisioninduced dephasing by periodic, erratic, or noisy driving. The Fig1: From left to right: (a) The Wigner function of a prepared Fock state. The red dashed line is the separatrix. (b) The same, viewed from the right, after a finite time evolution. Fig2: From left to right: (a) The time evolution of the Bloch vector for various coherent preparations. (b) The quantum Zeno effect for Pi preparation due to the presence of noise. Fig3: Phase space tomography for a kickedtop: the participation number for all coherent preparations is imaged for an integrable phasespace (left), for a mixed phasespace (middle) and for a chaotic phasespace (right). In the latter case one observes the effect of scarring. For references click here 

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