Zobrazeno 1 - 10
of 1 247
pro vyhledávání: '"Fishman, S."'
Publikováno v:
Phys. Rev. Lett. 99, 234101(2007)
Previous studies of quantum delta-kicked rotors have found momentum probability distributions with a typical width (localization length $L$) characterized by fractional $\hbar$-scaling, ie $L \sim \hbar^{2/3}$ in regimes and phase-space regions close
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702670
Publikováno v:
Phys. Rev. E 73, 066202 (2006).
We examine the quantum dynamics of cold atoms subjected to {\em pairs} of closely spaced $\delta$-kicks from standing waves of light, and find behaviour quite unlike the well-studied quantum kicked rotor (QKR). Recent experiments [Jones et al, {\em P
Externí odkaz:
http://arxiv.org/abs/physics/0510161
Autor:
Buchleitner, A., d'Arcy, M. B., Fishman, S., Gardiner, S. A., Guarneri, I., Ma, Z. -Y., Rebuzzini, L., Summy, G. S.
Publikováno v:
Phys. Rev. Lett. 96, 164101 (2006)
We show that mode-locking finds a purely quantum non-dissipative counterpart in atom-optical quantum accelerator modes. These modes are formed by exposing cold atoms to periodic kicks in the direction of the gravitational field. They are anchored to
Externí odkaz:
http://arxiv.org/abs/physics/0501146
Quantization of energy balance equations, which describe a separatrix -- like motion is presented. The method is based on an exact canonical transformation of the energy--time pair to the action-angle canonical pair, $ (E,t)\to (I,\theta) $. Quantum
Externí odkaz:
http://arxiv.org/abs/nlin/0212005
Publikováno v:
Phys. Rev. B, 62, 15348, (2000)
A recently found metal-insulator transition in a model for cyclotron resonance in a two-dimensional periodic potential is investigated by means of spectral properties of the time evolution operator. The previously found dynamical signatures of the tr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0008212
Autor:
Khodas, M., Fishman, S.
The dynamics of the kicked-rotor, that is a paradigm for a mixed system, where the motion in some parts of phase space is chaotic and in other parts is regular is studied statistically. The evolution (Frobenius-Perron) operator of phase space densiti
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9910039
The relaxation rates to the invariant density in the chaotic phase space component of the kicked rotor (standard map) are calculated analytically for a large stochasticity parameter, $K$. These rates are the logarithms of the poles of the matrix elem
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9910040
Autor:
Iomin, A., Fishman, S.
It is shown that a family of models associated with the kicked Harper model is relevant for cyclotron resonance experiments in an antidot array. For this purpose a simplified model for electronic motion in a related model system in presence of a magn
Externí odkaz:
http://arxiv.org/abs/cond-mat/9908194
Autor:
Auslaender, O. M., Fishman, S.
Publikováno v:
Physica D 128, 180 (1999).
The interest in the properties of quantum systems, whose classical dynamics are chaotic, derives from their abundance in nature. The spectrum of such systems can be related, in the semiclassical approximation (SCA), to the unstable classical periodic
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9707021
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.