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We present a nonlinear post-Friedmann framework for structure formation, generalizing to cosmology the weak-field (post-Minkowskian) approximation, unifying the treatment of small and large scales. We consider a universe filled with a…

General Relativity and Quantum Cosmology · Physics 2015-08-06 Irene Milillo , Daniele Bertacca , Marco Bruni , Andrea Maselli

Building upon the statistical formulation for parameter estimation (PE) in the presence of correlated noise proposed by Cireddu et al., we present the initial study to incorporate the effects of correlated noise into the analyses of various…

General Relativity and Quantum Cosmology · Physics 2025-02-25 Isaac C. F. Wong , Peter T. H. Pang , Milan Wils , Francesco Cireddu , Walter Del Pozzo , Tjonnie G. F. Li

Lagrangian data assimilation aims to recover hidden Eulerian flow fields from sparse, indirect observations of moving tracers. This problem is challenging because tracer trajectories are nonlinearly coupled with the underlying flow, making…

Computational Engineering, Finance, and Science · Computer Science 2026-03-17 Zhongrui Wang , Chuanqi Chen , Jin-Long Wu , Nan Chen

Deep learning is widely used to predict complex dynamical systems in many scientific and engineering areas. However, the black-box nature of these deep learning models presents significant challenges for carrying out simultaneous data…

Machine Learning · Computer Science 2025-04-04 Chuanqi Chen , Nan Chen , Yinling Zhang , Jin-Long Wu

We study the cosmic variance limit on constraining primordial non-Gaussianity for a variety of theory-motivated shapes. We consider general arguments for 2D and 3D surveys, with a particular emphasis on the CMB. A scale-invariant $N$-point…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-11 Alba Kalaja , P. Daniel Meerburg , Guilherme L. Pimentel , William R. Coulton

In this work, we develop a unified framework for quasidiagonal and F\o lner-type approximations of linear operators on Hilbert spaces. These approximations (originally formulated for bounded operators and operator algebras) involve…

Functional Analysis · Mathematics 2025-09-04 Eva A. Gallardo-Gutiérrez , Fernando Lledó , Laura Sáenz

Support constrained generator matrix for a linear code has been an active topic in recent years. The necessary and sufficient condition for the existence of MDS codes over small fields with support constrained generator matrices were…

Information Theory · Computer Science 2021-11-08 Hao Chen

We show that the presence of a lightish scalar resonance, $\sigma$, that mixes with the composite Goldstone-Higgs boson can relax the typical bounds found in this class of models. This mechanism, inbred in models with a walking dynamics…

High Energy Physics - Phenomenology · Physics 2019-12-23 Diogo Buarque Franzosi , Giacomo Cacciapaglia , Aldo Deandrea

The mean field composite Fermion (CF) picture successfully predicts angular momenta of multiplets forming the lowest energy band in fractional quantum Hall (FQH) systems. This success cannot be attributed to a cancellation between Coulomb…

Mesoscale and Nanoscale Physics · Physics 2017-02-08 Arkadiusz Wojs , John J. Quinn

Noncommutative geometry governs the physics of quantum Hall (QH) effects. We introduce the Weyl ordering of the second quantized density operator to explore the dynamics of electrons in the lowest Landau level. We analyze QH systems made of…

High Energy Physics - Theory · Physics 2009-11-07 Z. F. Ezawa , G. Tsitsishvili , K. Hasebe

Dynamic fading channels are modeled at two fundamentally different levels of abstraction. At the physical layer, the standard representation is a correlated Gaussian process, such as the dB-domain signal power in log-normal shadow fading.…

Information Theory · Computer Science 2026-04-06 Bhaskar Krishnamachari , Victor Gutierrez

We study a condensed version of the \'etale homotopy type of a scheme, which refines both the usual \'etale homotopy type of Friedlander-Artin-Mazur and the pro\'etale fundamental group of Bhatt-Scholze. In the first part of this paper, we…

We explore discovery signatures of techni-dilaton (TD) at LHC. The TD was predicted long ago as a composite pseudo Nambu-Goldstone boson (pNGB) associated with the spontaneous breaking of the approximate scale symmetry in the walking…

High Energy Physics - Phenomenology · Physics 2012-03-03 Shinya Matsuzaki , Koichi Yamawaki

The Fully Constrained Formulation (FCF) of General Relativity is a novel framework introduced as an alternative to the hyperbolic formulations traditionally used in numerical relativity. The FCF equations form a hybrid elliptic-hyperbolic…

General Relativity and Quantum Cosmology · Physics 2015-05-30 Isabel Cordero-Carrión , Pablo Cerdá-Durán , José María Ibáñez

We prove a CLT for spectra of submatrices of real symmetric and Hermitian Wigner matrices. We show that if in the standard normalization the fourth moment of the off-digonal entries is GOE/GUE-like then the limiting Gaussian process can be…

Probability · Mathematics 2010-10-06 Alexei Borodin

We present an analysis of the constraints on the amplitude of primordial non-Gaussianity of local type described by the dimensionless parameter $f_{\rm NL}$. These constraints are set by the auto-correlation functions (ACFs) of two large…

Cosmology and Nongalactic Astrophysics · Physics 2010-08-11 Jun-Qing Xia , Anna Bonaldi , Carlo Baccigalupi , Gianfranco De Zotti , Sabino Matarrese , Licia Verde , Matteo Viel

Search sensitivity to a stochastic gravitational-wave background (SGWB) is enhanced by cross-correlating detector signals. However, one of the most serious concerns is the environmental noise correlated between detectors. The global…

General Relativity and Quantum Cosmology · Physics 2023-04-05 Yoshiaki Himemoto , Atsushi Nishizawa , Atsushi Taruya

Some interesting nonperturbative properties of the strongly coupled 4D compact U(1) lattice gauge theories, both without and with matter fields, are pointed out. We demonstrate that the pure gauge theory has a non-Gaussian fixed point with…

High Energy Physics - Lattice · Physics 2007-05-23 W. Franzki , J. Jersak , C. B. Lang , T. Neuhaus

We introduce a new generic model of a deformed Composite Fermion-Fermi Surface (CF-FS) for the Fractional Quantum Hall Effect near $\nu=1/2$ in the presence of a periodic density modulation. Our model permits us to explain the recent…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Nataliya A. Zimbovskaya , Joseph L. Birman

An analytic model a la Middleton of the impulsive noise component in the data of interferometric gravitational wave detectors is proposed, based on an atomic representation of glitches. A fully analytic characterization of the coherent…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Maria Principe , Innocenzo M Pinto