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排序方式: 共有118条查询结果,搜索用时 15 毫秒
1.
Journal of Statistical Physics - We provide a very simple argument showing that the $$\Phi ^4_3$$ measure does have quartic exponential tails, as expected from its formal expression. This shows... 相似文献
2.
Dr. Daniele Paderni Dr. Eleonora Macedi Dr. Larisa Lvova Dr. Gianluca Ambrosi Prof. Mauro Formica Prof. Luca Giorgi Prof. Roberto Paolesse Prof. Vieri Fusi 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(49):e202201062
A new series of ligands containing the 2-(2-hydroxy-3- naphthyl)-4-methylbenzoxazole (HNBO) fluorophore showed selectivity for Mg2+ ions, without the interference of Ca2+. The most promising representative L3 resulted the best performing sensor for Mg2+ both in solution and embedded in an all-solid-state optode, especially towards real samples of drinkable water. 相似文献
3.
We prove Coleman’s conjecture on the equivalence between the massless Sine-Gordon model with finite volume interaction and
the Thirring model with a finite volume mass term. 相似文献
4.
Marino Badiale Vieri Benci Teresa D'Aprile 《Calculus of Variations and Partial Differential Equations》2001,12(3):223-258
In this paper we study existence, multiplicity and concentration of solutions for the following nonlinear field equation
where the potential V is positive and W is an appropriate singular function. Here is regarded as a small parameter. Under suitable conditions on V and W we find solutions exhibiting a concentration behaviour at an absolute minimum of V as Such solutions are obtained as local minima for the associated functional; the proofs of our results rely on a careful analysis
of the behaviour of minimizing sequences and use arguments inspired by the concentration-compactness principle.
Received July 21, 1999; Accepted April 9, 2000 / Published online September 14, 2000 相似文献
5.
The hyperreal numbers of nonstandard analysis are characterized in purely algebraic terms as homomorphic images of a suitable class of rings of functions.
6.
Vieri Mastropietro 《Journal of statistical physics》2005,121(3-4):373-432
We give the first rigorous (non perturbative) proof of Luttinger liquid behavior in the one dimensional Hubbard model, for
small repulsive interaction and values of the density different from half filling. The analysis is based on the combination
of multiscale analysis with Ward identities based on a hidden and approximate local chiral gauge invariance. No use is done
of exact solutions or special integrability properties of the Hubbard model, and the results can be in fact easily generalized
to include non local interactions, magnetic fields or interaction with external potentials 相似文献
7.
We consider the Abelian gauge theory related to the interaction between the solitary waves of the nonlinear Klein-Gordon equation
and the electromagnetic field. We analyze the existence of electromagnetostatic solutions and, in particular, of vortices.
Dedicated to the memory of Professor Aldo Cossu 相似文献
8.
We prove the convergence of the perturbative expansion, based on Renormalization Group, of the two point Schwinger function of a system of weakly interacting fermions in d = 2, with symmetric Fermi surface and up to exponentially small temperatures, close to the expected onset of superconductivity. 相似文献
9.
We give a self consistent and simplified proof of the (asymptotic) vanishing of the Beta function in d=1 interacting Fermi systems as a consequence of a few properties deduced from the exact solution of the Luttinger model. Moreover, since the vanishing of the Beta function is usually “proved” in the physical literature through heuristic arguments based on Ward identities, we briefly discuss here also the possibility of exploiting this idea in a rigorous approach, by using a suitable Dyson equation. We show that there are serious difficulties, related to the presence of corrections (for which we get careful bounds), which are usually neglected. 相似文献
10.
Vieri Benci 《Advances in Mathematics》2003,173(1):50-67
The notions of “labelled set” and “numerosity” are introduced to generalize the counting process of finite sets. The resulting numbers, called numerosities, are then used to develop nonstandard analysis. The existence of a numerosity function is equivalent to the existence of a selective ultrafilter, hence it is independent of the axioms of ZFC. 相似文献