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R. A. Caetano F.A.B.F. de Moura M. L. Lyra 《The European Physical Journal B - Condensed Matter and Complex Systems》2011,80(3):321-324
In this work, we investigate the competition of disorder, nonlinearity and non-adiabatic process on the wave packet dynamics
in 1D. We follow the time evolution of the second moment of the wave packet distribution to characterize its spreading behavior.
In order to describe the dynamical behavior of one-electron wave packets, we solve a discrete nonlinear Schr?dinger equation
which effectively takes into account a diagonal disorder and a nonlinear contribution. Going beyond the adiabatic regime,
we consider that the nonlinearity relaxes in time according to a Debye-like law. In the adiabatic regime, it has been recently
demonstrated that the interplay of disorder and nonlinearity leads to a sub-diffusive spread of the wave packet. Here, we
numerically demonstrate that no sub-diffusive spreading of the second moment of the wave packet distribution takes place when
the finite response time of the nonlinearity is taken into account. 相似文献
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In this paper we consider generalized Hardy spaces which include classical Hardy spaces and Hardy-Lorentz spaces as special
cases. We give real interpolation results for such spaces. As applications, we solve an interpolation problem for Besov spaces
of generalized smoothness and prove the boundedness of pseudodifferential operators acting both in these spaces and in the
local Hardy spaces. For the latter spaces, we also obtain wavelet decompositions. 相似文献
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Newton L Dias Filho Devaney R do Carmo Laércio Caetano André H Rosa 《Analytical sciences》2005,21(11):1359-1363
A mercury-sensitive chemically modified graphite paste electrode was constructed by incorporating modified silica gel into a conventional graphite paste electrode. The functional group attached to the (3-chloropropyl) silica gel surface was 2-mercaptoimidazole, giving a new product denoted by 3-(2-thioimidazolyl)propyl silica gel, which is able to complex mercury ions. Mercury was chemically adsorbed on the modified graphite paste electrode containing 3-(2-thioimidazolyl)propyl silica (TIPSG GPE) by immersion in a Hg(II) solution, and the resultant surface was characterized by cyclic and differential pulse anodic stripping voltammetry. One cathodic peak at 0.1 V and other anodic peak at 0.34 V were observed on scanning the potential from -0.1 to 0.8 V (0.01 M KNO3; v = 2.0 mV s(-1) vs. Ag/AgCl). The anodic peak at 0.34 V show an excellent sensitivity for Hg(II) ions in the presence of several foreign ions. A calibration graph covering the concentration range from 0.02 to 2 mg L(-1) was obtained. The detection limit was estimated to be 5 microg L(-1). The precision for six determinations of 0.05 and 0.26 mg L(-1) Hg(II) was 3.0 and 2.5% (relative standard deviation), respectively. The method can be used to determine the concentration of mercury(II) in natural waters contaminated by this metal. 相似文献
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