Results 71 to 80 of about 239,074 (309)

A spatially periodic Kuramoto-Sivashinsky equation as a model problem for inclined film flow over wavy bottom

open access: yesElectronic Journal of Differential Equations, 2007
The spatially periodic Kuramoto-Sivashinsky equation (pKS) $$ partial_t u=-partial_x^4 u-c_3partial_x^3 u-c_2partial_x^2 u+2 deltapartial_x(cos( x)u)-partial_x(u^2), $$ with $u(t,x)inmathbb{R}$, $tgeq 0$, $xinmathbb{R}$, is a model problem for inclined ...
Andreas Wierschem, Hannes Uecker
doaj  

From bottom-up approaches to levels of organization and extended critical transitions

open access: yesFrontiers in Physiology, 2012
Biological thinking is structured by the notion of level of organization. We will show that this notion acquires a precise meaning in critical phenomena: they disrupt, by the appearance of infinite quantities, the mathematical (possibly equational ...
Giuseppe eLongo   +6 more
doaj   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

open access: yesAdvanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal   +14 more
wiley   +1 more source

Functional renormalization group approach to zero-dimensional interacting systems

open access: yes, 2004
We apply the functional renormalization group method to the calculation of dynamical properties of zero-dimensional interacting quantum systems. As case studies we discuss the anharmonic oscillator and the single impurity Anderson model.
Allen J W   +28 more
core   +1 more source

Quantum Probability, Renormalization and Infinite-Dimensional *-Lie Algebras

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
The present paper reviews some intriguing connections which link together a new renormalization technique, the theory of *-representations of infinite dimensional *-Lie algebras, quantum probability, white noise and stochastic calculus and the theory of ...
Luigi Accardi, Andreas Boukas
doaj   +1 more source

A new method that automatically regularizes scattering amplitudes

open access: yesJournal of Physics Communications, 2023
We present a new regularization procedure called autoregularization . The new procedure regularizes the divergences, encountered previously in a scattering process, using the intrinsic scale of the process.
Nagabhushana Prabhu
doaj   +1 more source

Jackson R. Herring and the Statistical Closure Problem of Turbulence: A Review of Renormalized Perturbation Theories

open access: yesAtmosphere, 2023
The pioneering applications of the methods of theoretical physics to the turbulence statistical closure problem are summarised. These are: the direct-interaction approximation (DIA) of Kraichnan, the self-consistent-field theory of Edwards, and the self ...
David McComb
doaj   +1 more source

Network renormalization

open access: yesNature Reviews Physics
39 pages, 4 ...
Andrea Gabrielli   +3 more
openaire   +2 more sources

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

open access: yesAdvanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida   +3 more
wiley   +1 more source

An improved $\eps$ expansion for three-dimensional turbulence: two-loop renormalization near two dimensions

open access: yes, 2004
An improved $\eps$ expansion in the $d$-dimensional ($d > 2$) stochastic theory of turbulence is constructed at two-loop order which incorporates the effect of pole singularities at $d \to 2$ in coefficients of the $\eps$ expansion of universal ...
A. N. Vasil’ev   +15 more
core   +1 more source

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