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Collective response to local perturbations: how to evade threats without losing coherence

Living groups move in complex environments and are constantly subject to external stimuli, predatory attacks and disturbances. An efficient response to such perturbations is vital to maintain the group's coherence and cohesion. Perturbations are often local, i.e. they are initially perceived only by few individuals in the group, but can elicit a global response. This is the case of starling flocks, that can turn very quickly to evade predators. In this paper, we investigate the conditions und...

Replica approach to the generalized Rosenzweig-Porter model

The generalized Rosenzweig-Porter model with real (GOE) off-diagonal entries arguably constitutes the simplest random matrix ensemble displaying a phase with fractal eigen-states, which we characterize here by using replica methods. We first derive analytical expressions for the average spectral density in the limit in which the size N of the ma-trix is large but finite. We then focus on the number of eigenvalues in a finite interval and compute its cumulant generating function as well as the...

Tracer particle in a confined correlated medium: an adiabatic elimination method

We present a simple and systematic procedure to determine the effective dynamics of a Brownian particle coupled to a rapidly fluctuating correlated medium, modeled as a scalar Gaussian field, under spatial confinement. The method allows us, in particular, to address the case in which the fluctuations of the medium are suppressed in the vicinity of the particle, as described by a quadratic coupling in the underlying Hamiltonian. As a consequence of the confinement of the correlated medium, the...

Spike-response properties of neocortical cells:an in silico study

The input-output (I-O) properties of cortical excitatory neurons have been intensively studied in the past. Recently, theoretical work has demonstrated that the I-O properties in the high-frequency (HF) domain are not universally determined solely by neuronal properties, but also depend on the interplay between these neuronal properties and input statistics. This study aims to validate the aforementioned theoretical work using an extensive set of numerical simulations on state-of-the-a...

Heun Connection Formulae from Liouville Correlators

We perform a detailed study of a class of irregular correlators in Liouville Conformal Field Theory, of the related Virasoro conformal blocks with irregular singularities and of their connection formulae. Upon considering their semi-classical limit, we provide explicit expressions of the connection matrices for the Heun function and a class of its confluences. Their calculation is reduced to concrete combinatorial formulae from conformal block expansions. Since Heun functions solve wave equat...

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Tipologia
  • 1 Article9363
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  • 4 Conference object719
  • 2 Book part305
  • 3 Book51
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  • 7 Trusteeship14
Autore
  • Legname, Giuseppe355
  • Baccigalupi, Carlo334
  • Danese, Luigi318
  • Bressan, Alessandro230
  • Calabrese, Pasquale230
  • Viel, Matteo230
  • Baroni, Stefano219
  • Tosatti, Erio202
  • Liberati, Stefano200
  • De Zotti, Gianfranco197
Data di pubblicazione
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  • 2020 - 20231580
  • 2010 - 20195247
  • 2000 - 20093470
  • 1990 - 19991675
  • 1980 - 1989618
  • 1970 - 197976
  • 1962 - 196914
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  • JOURNAL OF HIGH ENERGY PHYSICS398
  • ASTRONOMY & ASTROPHYSICS368
  • PHYSICAL REVIEW LETTERS353
  • PHYSICAL REVIEW. B, CONDENSED MAT...339
  • THE ASTROPHYSICAL JOURNAL226
  • JOURNAL OF COSMOLOGY AND ASTROPAR...197
  • PHYSICAL REVIEW D, PARTICLES, FIE...195
  • NUCLEAR PHYSICS. B191
  • PHYSICS LETTERS. SECTION B177
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Settore disciplinare
  • Settore FIS/05 - Astronomia e Ast...1856
  • Settore FIS/03 - Fisica della Mat...1605
  • Settore FIS/02 - Fisica Teorica, ...1456
  • Settore MAT/05 - Analisi Matematica610
  • Settore BIO/09 - Fisiologia491
  • Settore MAT/07 - Fisica Matematica471
  • Settore M-PSI/02 - Psicobiologia ...360
  • Settore MAT/08 - Analisi Numerica245
  • Settore MAT/03 - Geometria229
  • Settore BIO/13 - Biologia Applicata147
Keyword
  • Humans135
  • Animals104
  • Cosmic background radiation87
  • Cosmology: observations78
  • dark matter73
  • Astronomy and Astrophysics72
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  • High Energy Physics - Theory66
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  • galaxies: evolution65
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