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Autor:
Maryenko, D., Metzger, J. J., Ospald, F., Umansky, V., Fleischmann, R., Geisel, T., von Klitzing, K., Smet, J. H.
We demonstrate that branching of the electron flow in semiconductor nanostructures can strongly affect macroscopic transport quantities and can significantly change their dependence on external parameters compared to the ideal ballistic case even whe
Externí odkaz:
http://arxiv.org/abs/1204.3775
Publikováno v:
Phys. Rev. A 83, 063608 (2011)
We investigate the effects of phase noise and particle loss on the dynamics of a Bose-Einstein condensate in an optical lattice. Starting from the many-body master equation, we discuss the applicability of generalized mean-field approximations in the
Externí odkaz:
http://arxiv.org/abs/1203.3657
One of the most fascinating experimental achievements of the last decade was the realization of Bose-Einstein Condensation (BEC) of ultra-cold atoms in optical lattices (OL's). The extraordinary level of control over these structures allows us to inv
Externí odkaz:
http://arxiv.org/abs/0805.1948
In mesoscopic systems conductance fluctuations are a sensitive probe of electron dynamics and chaotic phenomena. We show that the conductance of a purely classical chaotic system with either fully chaotic or mixed phase space generically exhibits fra
Externí odkaz:
http://arxiv.org/abs/0705.4296
Publikováno v:
Phys. Rev. A 73, 061604(R), 2006
We consider a family of chaotic Bose-Hubbard Hamiltonians (BHH) parameterized by the coupling strength $k$ between neighboring sites. As $k$ increases the eigenstates undergo changes, reflected in the structure of the Local Density of States. We anal
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610135
Publikováno v:
Nature 439 (2006) 462
The dynamic spatial redistribution of individuals is a key driving force of various spatiotemporal phenomena on geographical scales. It can synchronise populations of interacting species, stabilise them, and diversify gene pools [1-3]. Human travelli
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605511
Publikováno v:
Annals of Physics 321, 1025 (2006)
We introduce and analyze the physics of "driving reversal" experiments. These are prototype wavepacket dynamics scenarios probing quantum irreversibility. Unlike the mostly hypothetical "time reversal" concept, a "driving reversal" scenario can be re
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506300
The result of computational operations performed at the single cell level are coded into sequences of action potentials (APs). In the cerebral cortex, due to its columnar organization, large number of neurons are involved in any individual processing
Externí odkaz:
http://arxiv.org/abs/q-bio/0411042
Publikováno v:
Proc. Nat. Acam. Sci., 101:15124-15129, 2004
The rapid worldwide spread of the severe acute respiratory syndrome (SARS) demonstrated the potential threat an infectious disease poses in a closely interconnected and interdependent world. Here we introduce a probabilistic model which describes the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410766