نتایج جستجو برای: amplitude scale

تعداد نتایج: 663916  

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2004
A Bershadskii J J Niemela A Praskovsky K R Sreenivasan

Temperature time traces are obtained in turbulent thermal convection at high Rayleigh numbers. Measurements are made in the midplane of the apparatus, near the sidewall but outside the boundary layer. A telegraph approximation for temperature traces is generated by setting the fluctuation amplitude to 1 or 0 depending on whether or not it exceeds the mean value. Unlike the standard diagnostics ...

2008
MARIJA VUCELJA ITZHAK FOUXON

We study the growth of small-scale inhomogeneities of the density of particles floating in weakly nonlinear, small-amplitude, surface waves. Despite the amplitude smallness, the accumulated effect of the long-time evolution may produce strongly inhomogeneous distribution of the floaters: density fluctuations grow exponentially with a small but finite exponent. We show that the exponent is of si...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2013
Johannes M Höfener Gautam C Sethia Thilo Gross

Amplitude death is a dynamical phenomenon in which a network of oscillators settles to a stable state as a result of coupling. Here, we study amplitude death in a generalized model of delay-coupled delay oscillators. We derive analytical results for degree homogeneous networks which show that amplitude death is governed by certain eigenvalues of the network's adjacency matrix. In particular, th...

2001
Fizuli Mamedov

We investigate the radiation amplitude zeros exhibited by many Standard Model amplitudes for triple weak gauge boson production processes. We show thatWZγ production amplitudes have especially rich structure in terms of zeros, these amplitudes have zeros originating from several different sources. It is also shown that TYPE I current null zone is the special case of the equality of the specific...

2002
Donald M. LEVINE

The kinematical constraints of helicity amplitudes are studied using the general ideas of Jackson and Hite. The helicity amplitudes are expressed in terms of a Taylor ser ies expansion from which all constraints at threshold and pseudothreshold can be tr ivial ly found. The simplicity of this approach is i l lustrated by deriving all of the constraints for 7rp --* N~ and ~rp --* AN.

2006
Adam P. Szczepaniak

The natural interpretation of deep inelastic scattering is in terms of hard scattering on QCD constituents of the target. We examine the relation between amplitudes measured in exclusive lepto-production and the quark content of the nucleon. We show that in the Bjorken limit, the natural interpretation of amplitudes measured in these hard exclusive processes is in terms of the quark content of ...

2008
Harry Buhrman Christoph Dürr Frédéric Magniez Miklos Santha Ronald de Wolf

We present several applications of quantum amplitude amplification to finding claws and collisions in ordered or unordered functions. Our algorithms generalize those of Brassard, Høyer, and Tapp, and imply an N3/4 logN quantum upper bound for the element distinctness problem (contrasting with N logN classical complexity). We also give an algorithm to finding a triangle in a graph more efficient...

2009
Riccardo Franco

In this article, I show that a recent family of quantum algorithms, based on the quantum amplitude amplification algorithm, can be used to describe a cognitive heuristic called availability bias. The amplitude amplification algorithm is used to define quantitatively the ease of a memory task, while the quantum amplitude estimation and the quantum counting algorithms to describe cognitive tasks ...

2008
O. V. Selyugin

The analytic properties of the eikonal and U -matrix unitarization schemes are examined. It is shown that the basic properties of these schemes are identical. Both can fill the full circle of unitarity, and both can lead to standard and non-standard asymptotic relations for σel/σtot. The relation between the phases of the unitarised amplitudes in each scheme is examined, and it is shown that de...

2003
N. N. Achasov

We show on gauge invariance grounds that the fine threshold phenomenon is discovered in the radiative decays φ → γa 0 → γπ 0 η and φ → γf 0 → γπ 0 π 0. This enables to conclude that production of the lightest scalar mesons a 0 (980) and f 0 (980) in these decays is caused by the four-quark transitions, resulting in strong restrictions on the large N C expansions of the decay amplitudes. The ana...

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