We study theoretically quantum dynamics of interacting bosons in artificial magnetic fields as engineered in recent ultracold atomic experiments, where quantum cyclotron orbital motion has been observed. With exact numerical simulations and perturbative analyses, we find that interactions induce damping in the cyclotron motion. The damping time is found to be dependent on interaction and tunneling strengths monotonically, while its dependence on magnetic flux is nonmonotonic. Sufficiently strong interactions would render bosons dynamically localized, inhibiting the cyclotron motion. The damping predicted by us can be construed as an interaction-induced quantum decoherence of the cyclotron motion. ·
We propose a real-space renormalization group method to explicitly decouple into independent components a many-body system that, as in the phenomenon of spin-charge separation, exhibits separation of degrees of freedom at low energies. Our approach produces a branching holographic description of such systems that opens the path to the efficient simulation of the most entangled phases of quantum matter, such as those whose ground state violates a boundary law for entanglement entropy. As in the coarse-graining transformation of Vidal [Phys. Rev. Lett. 99, 220405 (2007) ·
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Flashing signal lamps and unfamiliar control elements tend to worry car drivers. The Avatar-based Virtual Co-driver System (AviCoS) will provide drivers with information directly and on-demand, making cumbersome paging through owner’s manuals a thing of the past. The AviCoS system reacts to a touch of the control elements and via a natural-language interface. A virtual assistant, the avatar, dispenses explicit information on the vehicle – supported by images and videos. The system was developed by the Technische Universitaet Muenchen Institute of Business Informatics in cooperation with Audi AG. ·
Makoto Yamaguchi, and Tetsuo Ogawa. (2014)cite arxiv:1403.5593Comment: 19 pages, 7 figures; prepared for the Springer Lecture Notes in Physics "Quantum Computing, Quantum Communication and Quantum Metrology" edited by Yoshihisa Yamamoto and Kouichi Semba.