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Journal articles on the topic 'Scalar emergence'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Orlandi, Paolo, and Sergio Pirozzoli. "Effect of Schmidt Number on Forced Isotropic Turbulence with Passive Scalars." Fluids 8, no. 9 (2023): 248. http://dx.doi.org/10.3390/fluids8090248.

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Traditionally, Fourier spectra have been employed to gain a deeper understanding of turbulence flow structures. The investigation of isotropic forced turbulence with passive scalars offers a straightforward means to examine the disparities between velocity and passive scalar spectra. This flow configuration has been extensively studied in the past, encompassing a range of Reynolds and Schmidt numbers. In this present study, direct numerical simulations (DNS) of this flow are conducted at sufficiently high Reynolds numbers, enabling the formation of a wide inertial range. The primary focus of t

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2

Huang, Kerson, Chi Xiong, and Xiaofei Zhao. "Scalar-field theory of dark matter." International Journal of Modern Physics A 29, no. 13 (2014): 1450074. http://dx.doi.org/10.1142/s0217751x14500742.

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We develop a theory of dark matter based on a previously proposed picture, in which a complex vacuum scalar field makes the universe a superfluid, with the energy density of the superfluid giving rise to dark energy, and variations from vacuum density giving rise to dark matter. We formulate a nonlinear Klein–Gordon equation to describe the superfluid, treating galaxies as external sources. We study the response of the superfluid to the galaxies, in particular, the emergence of the dark-matter galactic halo, contortions during galaxy collisions and the creation of vortices due to galactic rota

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Beesham, Aroonkumar. "Emergence of Warm Inflation in Curved Space-Time between Accelerating Branes." Advances in High Energy Physics 2020 (February 21, 2020): 1–15. http://dx.doi.org/10.1155/2020/3963279.

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It appears that having our own brane to somehow interact with other branes could give rise to quite an interesting system and that interaction could lead to some observable effects. We consider the question of whether or not these signatures of interaction between the branes can be observed. To answer this question, we investigate the effect induced by the inflaton in the WMAP7 data using the warm inflationary model. In this model, slow-roll and perturbation parameters are given in terms of the inflaton thermal distribution. We show that this distribution depends on the orbital radius of the b

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4

Lüttge, Ulrich. "Integrative emergence in contrast to separating modularity in plant biology: views on systems biology with information, signals and memory at scalar levels from molecules to the biosphere." Theoretical and Experimental Plant Physiology 33, no. 1 (2021): 1–13. http://dx.doi.org/10.1007/s40626-021-00198-x.

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AbstractModularity is reductionism and materialism, where modules are considered as building blocks per se. By contrast self-organization of modules in living organisms, like plants, generates the emergence of integrated systems with new properties not predicted by the properties of the modules. This can occur at the hierarchy of a series of scalar levels, where emergent systems become modules for emergence of new systems on the next higher scalar level akin to a hierarchy of networks from molecules, cells and individuals up to the levels of ecosystems, biomes and the entire biosphere or Gaia.

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CELANI, ANTONIO, MARCO MARTINS AFONSO, and ANDREA MAZZINO. "Point-source scalar turbulence." Journal of Fluid Mechanics 583 (July 4, 2007): 189–98. http://dx.doi.org/10.1017/s0022112007006520.

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The statistics of a passive scalar randomly emitted from a point source is investigated analytically for the Kraichnan ensemble. Attention is focused on the two-point equal-time scalar correlation function, a statistical indicator widely used both in experiments and in numerical simulations. The only source of inhomogeneity/anisotropy is the injection mechanism, the advecting velocity being here statistically homogeneous and isotropic. The main question we address is on the possible existence of an inertial range of scales and a consequent scaling behaviour. The question arises from the observ

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Cimaglia, Michela, Massimo Gengo, and Livio Pizzocchero. "Cosmologies with Perfect Fluids and Scalar Fields in Einstein’s Gravity: Phantom Scalars and Nonsingular Universes." Universe 10, no. 12 (2024): 467. https://doi.org/10.3390/universe10120467.

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In the initial part of this paper, we survey (in arbitrary spacetime dimension) the general FLRW cosmologies with non-interacting perfect fluids and with a canonical or phantom scalar field, minimally coupled to gravity and possibly self-interacting; after integrating the evolution equations for the fluids, any model of this kind can be described as a Lagrangian system with two degrees of freedom, where the Lagrange equations determine the evolution of the scale factor and the scalar field as functions of the cosmic time. We analyze specific solvable models, paying special attention to cases w

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7

SHEARER, MICHAEL, and CONSTANTINE DAFERMOS. "FINITE TIME EMERGENCE OF A SHOCK WAVE FOR SCALAR CONSERVATION LAWS." Journal of Hyperbolic Differential Equations 07, no. 01 (2010): 107–16. http://dx.doi.org/10.1142/s0219891610002037.

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For a convex conservation law [Formula: see text] bounded initial data u0(x), are considered that take on constant values u- to the left of a bounded interval, and u+ to the right, with u- > u+. The solution of the initial value problem is shown to collapse in finite time to a single shock wave joining u- to u+. The proof involves comparison with a solution having piecewise constant initial data, for which the evolution to a single shock involves straightforward rarefaction-shock interactions. This result has a significant application to steady granular flow in a chute, and the result is re

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8

Yu, Zhen, and David Gibbs. "Unravelling the role of green entrepreneurs in urban sustainability transitions: A case study of China’s Solar City." Urban Studies 57, no. 14 (2019): 2901–17. http://dx.doi.org/10.1177/0042098019888144.

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This paper aims to understand the role of green entrepreneurs in urban sustainability transitions. We propose an analytical framework combining transition approaches and green entrepreneurship from a relational lens. It includes four processes: emergence of green entrepreneurs, multi-scalar interest coordination, empowering through anchoring, and struggling with the regime at the urban scale. This framework is illustrated through an empirical analysis of the role of green entrepreneurs in the development of the solar water heater industry in China’s Solar City. The analysis unravels how the lo

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9

CHATTERJEE, ASHOK, and V. V. SREEDHAR. "FRACTIONAL STATISTICS INDUCED BY GAUGE FIELDS." Modern Physics Letters A 06, no. 05 (1991): 391–98. http://dx.doi.org/10.1142/s0217732391000385.

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An explicit extension of Polyakov’s analysis of a scalar particle coupled to an Abelian Chern-Simons gauge theory to the case of two particles and arbitrary values of the coupling is given. A simple proof of the emergence of fractional statistics induced by the gauge field follows within the path-integral framework.

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10

Suhardiman, Diana, Natalia Scurrah, and Nawaye Ayemyaing. "Scalar politics, power struggles and institutional emergence in Daw Lar Lake, Myanmar." Journal of Rural Studies 87 (October 2021): 32–44. http://dx.doi.org/10.1016/j.jrurstud.2021.08.023.

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11

Maiezza, Alessio, and Juan Carlos Vasquez. "Non-Wilsonian ultraviolet completion via transseries." International Journal of Modern Physics A 36, no. 02 (2021): 2150016. http://dx.doi.org/10.1142/s0217751x21500160.

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We study some of the implications for the perturbative renormalization program when augmented with the Borel–Ecalle resummation. We show the emergence of a new kind of nonperturbative fixed point for the scalar [Formula: see text] model, representing an ultraviolet self-completion by transseries. We argue that this completion is purely non-Wilsonian and it depends on one arbitrary constant stemming from the transseries solution of the renormalization group equation. On the other hand, if no fixed points are demanded through the adjustment of this arbitrary constant, we end up with an effective

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12

Chung, Calvin King Lam, and Jiang Xu. "Scale as both material and discursive: A view through China’s rescaling of urban planning system for environmental governance." Environment and Planning C: Government and Policy 34, no. 8 (2016): 1404–24. http://dx.doi.org/10.1177/0263774x15619630.

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This paper elaborates on the interconnectedness of scale and discourse in environmental governance. It accentuates that the emergence and subsequent reconfiguration of a particular scalar structure of environmental governance is the outcome of the discursive contest among various political actors, whose discourses acquire persuasive power through employing scale to frame how the world should be observed. In so arguing this paper distinguishes two moments of scale, as material political–environmental relations being shaped and as device shaping political–environmental relations. The connections

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13

Xue, Yesheng, Jie Jiang, and Ming Zhang. "Notes on emergent conformal symmetry for black holes." Journal of Cosmology and Astroparticle Physics 2024, no. 05 (2024): 036. http://dx.doi.org/10.1088/1475-7516/2024/05/036.

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Abstract We examine the motion of the massless scalar field and nearly bound null geodesics in the near-ring region of a black hole, which may possess either acceleration or a gravitomagnetic mass. Around such black holes, the photon ring deviates from the equatorial plane. In the large angular momentum limit, we demonstrate that the massless scalar field exhibits an emergent conformal symmetry in this near-ring region. Additionally, in the nearly bound limit, we observe the emergence of a conformal symmetry for the null geodesics that constitute the photon ring in the black hole image. These

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14

Koshel, Konstantin, Eugene Ryzhov, and Xavier Carton. "Vortex Interactions Subjected to Deformation Flows: A Review." Fluids 4, no. 1 (2019): 14. http://dx.doi.org/10.3390/fluids4010014.

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Deformation flows are the flows incorporating shear, strain and rotational components. These flows are ubiquitous in the geophysical flows, such as the ocean and atmosphere. They appear near almost any salience, such as isolated coherent structures (vortices and jets) and various fixed obstacles (submerged obstacles and continental boundaries). Fluid structures subject to such deformation flows may exhibit drastic changes in motion. In this review paper, we focus on the motion of a small number of coherent vortices embedded in deformation flows. Problems involving isolated one and two vortices

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Lukas, Martin C., and Michael Flitner. "Scalar fixes of environmental management in Java, Indonesia." Environment and Planning E: Nature and Space 2, no. 3 (2019): 565–89. http://dx.doi.org/10.1177/2514848619844769.

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This paper analyses the emergence and fixing of scales in struggles over environmental issues. Using the example of watershed and coastal management in Java, we show how political framings of environmental matters and struggles over resources are linked to scalar regimes. We conceptualise these regimes as scalar fixes in which scales of intervention and scales of knowledge production are bound by environmental narratives and social–ecological processes to produce lock-in effects for prolonged periods of time. In our empirical case, particular scales were central in providing ‘problem closure’

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Lukas, Martin C., and Michael Flitner. "Scalar fixes of environmental management in Java, Indonesia." Environment and Planning E: Nature and Space 2, no. 3 (2019): 565–89. https://doi.org/10.1177/2514848619844769.

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This paper analyses the emergence and fixing of scales in struggles over environmental issues. Using the example of watershed and coastal management in Java, we show how political framings of environmental matters and struggles over resources are linked to scalar regimes. We conceptualise these regimes as scalar fixes in which scales of intervention and scales of knowledge production are bound by environmental narratives and social–ecological processes to produce lock-in effects for prolonged periods of time. In our empirical case, particular scales were central in providing 'problem closure'

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17

Covington, Derrick. "Unified Cosmogenesis: Scalar-torsion Dynamics and the Foundations of Nudimmud Physics." Journal of Scientific Research and Reports 31, no. 4 (2025): 485–94. https://doi.org/10.9734/jsrr/2025/v31i42972.

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Aims: To develop a unified scalar-torsion cosmological framework—Nudimmud Physics—that resolves quantum gravity and cosmological singularities, and to validate its predictive capability through explicit comparison with established cosmological models and observational data. Study Design: Theoretical and computational comparative study at GreenTheDream.com Place and Duration of Study: Department of Theoretical Physics and Computational Cosmology at GreenTheDream.com, conducted from March 2024 to March 2025. Methodology: We constructed a simplified unified scalar potential derived from scalar-to

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18

HA, SEUNG-YEAL, EUNHEE JEONG, JEONG-HAN KANG, and KYUNGKEUN KANG. "EMERGENCE OF MULTI-CLUSTER CONFIGURATIONS FROM ATTRACTIVE AND REPULSIVE INTERACTIONS." Mathematical Models and Methods in Applied Sciences 22, no. 08 (2012): 1250013. http://dx.doi.org/10.1142/s0218202512500133.

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We discuss a first-order Cucker–Smale-type consensus model with attractive and repulsive interactions and present upper and lower bound estimates on the number of asymptotic point-clusters depending on the relative ranges of interactions and coupling strength. When the number of agents approaches infinity, we introduce a scalar conservation law with a non-local flux for a macroscopic description. We show that the corresponding conservation law admits a classical solution for sufficiently smooth initial data, which illustrates the shock avoidance effect due to the non-locality of the interactio

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19

Arbab, A. I., and M. Al-Ajmi. "The Modified Electromagnetism and the Emergent Longitudinal Wave." Applied Physics Research 10, no. 2 (2018): 45. http://dx.doi.org/10.5539/apr.v10n2p45.

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The classical theory of electromagnetism has been revisited and the possibility of longitudinal photon wave is explored. It is shown that the emergence of longitudinal wave is a consequence of Lorenz gauge (condition) violation. Proca, Vlaenderen & Waser and Arbab theories are investigated. The different approaches are compared to each other and the relevant equations are combined. The telegrapher’s equation can be obtained and with a specific choice of the function a Klein-Gordon equation of massive scalar field can be obtained. When the Lorentz gauge is violated by introducing the first

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20

Magalhães, Renan B., Gabriel P. Ribeiro, Haroldo C. D. Lima Junior, Gonzalo J. Olmo, and Luís C. B. Crispino. "Singular space-times with bounded algebraic curvature scalars." Journal of Cosmology and Astroparticle Physics 2024, no. 05 (2024): 114. http://dx.doi.org/10.1088/1475-7516/2024/05/114.

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Abstract We show that the absence of unbounded algebraic curvature invariants constructed from polynomials of the Riemann tensor cannot guarantee the absence of strong singularities. As a consequence, it is not sufficient to rely solely on the analysis of such scalars to assess the regularity of a given space-time. This conclusion follows from the analysis of incomplete geodesics within the internal region of asymmetric wormholes supported by scalar matter which arise in two distinct metric-affine gravity theories. These wormholes have bounded algebraic curvature scalars everywhere, which high

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21

Argent, Neil. "Rural geography I." Progress in Human Geography 41, no. 6 (2016): 803–12. http://dx.doi.org/10.1177/0309132516660656.

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This report focuses on the now substantial international rural geography literature on the emergence of so-called ‘resource peripheries’, linked to the economic expansion of rapidly industrializing nations such as India and China. The report outlines the major foci and key arguments of this body of work, noting its connections to, but also elaborations of, important concepts used within rural geography, including global commodity chains and their multi-scalar governance, involving, in part, political, economic and social relations between corporations and local communities. Noting the influenc

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22

Capozziello, Salvatore, Emmanuel N. Saridakis, Kazuharu Bamba, et al. "Cosmic space and Pauli exclusion principle in a system of M0-branes." International Journal of Geometric Methods in Modern Physics 14, no. 06 (2017): 1750095. http://dx.doi.org/10.1142/s0219887817500955.

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An emergence of cosmic space has been suggested by Padmanabhan [Emergence and expansion of cosmic space as due to the quest for holographic equipartition, arXiv:hep-th/1206.4916] where he proposed that the expansion of the universe originates from a difference between the number of degrees of freedom on a holographic surface and the one in the emerged bulk. Now, a natural question that arises is how this proposal would explain the production of fermions and an emergence of the Pauli exclusion principle during the evolution of the universe? We try to address this issue in a system of [Formula:

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23

Davis, Anne-Christine, and Scott Melville. "Orbital precession and hidden symmetries in scalar-tensor theories." Journal of Cosmology and Astroparticle Physics 2023, no. 11 (2023): 034. http://dx.doi.org/10.1088/1475-7516/2023/11/034.

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Abstract We revisit the connection between relativistic orbital precession, the Laplace-Runge-Lenz symmetry, and the t-channel discontinuity of scattering amplitudes. Applying this to scalar-tensor theories of gravity, we compute the conservative potential and orbital precession induced by both conformal/disformal-type couplings at second Post-Minkowskian order (𝒪(GN 2)), complementing the known third/first order Post-Newtonian results. There is a particular tuning of the conformal coupling for which the precession vanishes at leading PN order, and we show that this coincides with the emergenc

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24

Dritsa, Dimitra, and Nimish Biloria. "Towards a multi-scalar framework for smart healthcare." Smart and Sustainable Built Environment 7, no. 1 (2018): 33–52. http://dx.doi.org/10.1108/sasbe-10-2017-0057.

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Purpose The purpose of this paper is to investigate the role of emerging technologies in the promotion of health and well-being at the urban, domestic and bodily scale, through the systematic examination of technologies such as physical sensing systems and physiological data monitoring, that are currently explored as drivers for achieving sustainable healthcare within a multi-scalar approach. Design/methodology/approach A comprehensive study of the various technologies associated with smart healthcare is provided, first investigating smart cities, physical sensing systems and geospatial data a

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Luccisano, Lucy, and Laura Macdonald. "Neo-liberalism, Semi-clientelism and the Politics of Scale in Mexican Anti-poverty Policies." World Political Science 8, no. 1 (2012): 1–27. http://dx.doi.org/10.1515/wpsr-2012-0006.

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AbstractThis article examines the implications of the multi-scalar politics of Mexican anti-poverty policy for the long-term process of democratization. The federal anti-poverty policy, Progresa/Oportunidades, was designed to eliminate traditional clientelistic practices. While more obvious practices of pork-barrel politics have been eliminated in poverty alleviation programs, continued practices of top-down processes of program design and implementation strategies have resulted in the emergence of semi-clientelism. Argued in this paper is that municipal and state political actors have respond

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Bertolami, Orfeu, and Paulo M. Sá. "Multi-field cold and warm inflation and the de Sitter swampland conjectures." Journal of Cosmology and Astroparticle Physics 2022, no. 09 (2022): 001. http://dx.doi.org/10.1088/1475-7516/2022/09/001.

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Abstract We discuss under which conditions multi-field cold and warm inflationary models with canonical kinetic energy terms are compatible with the swampland conjectures about the emergence of de Sitter solutions in string theory. We find that under quite general conditions the slow-roll conditions for multi-field cold inflation are at odds with the swampland conjectures for an arbitrary number of scalar fields driving inflation. However, slow-roll conditions can be reconciled with the swampland conjectures in the strong dissipative regime of warm inflation.

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27

Corianò, Claudio, and Matteo Maria Maglio. "The Generalized Hypergeometric Structure of the Ward Identities of CFT’s in Momentum Space in d > 2." Axioms 9, no. 2 (2020): 54. http://dx.doi.org/10.3390/axioms9020054.

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We review the emergence of hypergeometric structures (of F4 Appell functions) from the conformal Ward identities (CWIs) in conformal field theories (CFTs) in dimensions d > 2. We illustrate the case of scalar 3- and 4-point functions. 3-point functions are associated to hypergeometric systems with four independent solutions. For symmetric correlators, they can be expressed in terms of a single 3K integral—functions of quadratic ratios of momenta—which is a parametric integral of three modified Bessel K functions. In the case of scalar 4-point functions, by requiring the correlator to be con

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Burns, Lucas, Konstantin Y. Bliokh, Franco Nori, and Justin Dressel. "Acoustic versus electromagnetic field theory: scalar, vector, spinor representations and the emergence of acoustic spin." New Journal of Physics 22, no. 5 (2020): 053050. http://dx.doi.org/10.1088/1367-2630/ab7f91.

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29

Wang, Zejun, and Qi Zhang. "Finite Time Emergence of A Shock Wave for Scalar Conservation Laws Via Lax-Oleinik Formula." Acta Mathematica Scientia 39, no. 1 (2019): 83–93. http://dx.doi.org/10.1007/s10473-019-0107-8.

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ELZE, HANS-THOMAS. "THE FUNCTIONAL DERIVATION OF MASTER EQUATIONS." Modern Physics Letters A 14, no. 32 (1999): 2259–67. http://dx.doi.org/10.1142/s0217732399002340.

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Master equations describe the quantum dynamics of open systems interacting with an environment. They play an increasingly important role in understanding the emergence of semiclassical behavior and the generation of entropy, both being related to quantum decoherence. Presently we derive the exact master equation for a homogeneous scalar Higgs or inflaton like field coupled to an environment field. It is represented here by an infinite set of harmonic oscillators with a given spectral density. Our nonperturbative result follows directly from the path integral representation of the density matri

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31

Capozziello, Salvatore, and Mariafelicia De Laurentis. "Noether symmetries in extended gravity quantum cosmology." International Journal of Geometric Methods in Modern Physics 11, no. 02 (2014): 1460004. http://dx.doi.org/10.1142/s0219887814600044.

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We summarize the use of Noether symmetries in Minisuperspace Quantum Cosmology. In particular, we consider minisuperspace models, showing that the existence of conserved quantities gives selection rules that allow to recover classical behaviors in cosmic evolution according to the so-called Hartle criterion. Such a criterion selects correlated regions in the configuration space of dynamical variables whose meaning is related to the emergence of classical observable universes. Some minisuperspace models are worked out starting from Extended Gravity, in particular coming from scalar-tensor, f(R)

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Trotti, Enrico. "Emergence of ghost in once-subtracted on-shell unitarization in glueball-glueball scattering." EPJ Web of Conferences 274 (2022): 03005. http://dx.doi.org/10.1051/epjconf/202227403005.

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We investigate the scattering of two scalar glueballs in pure YM theory, using the well known dilaton potential. We perform the calculations considering a glueball mass of about mG ≈ 1.7 GeV, as predicted by lattice QCD. We begin with the tree-level theory, but the question about the presence of a bound state needs a deeper study to be answered. Thus we unitarize the theory through a self energy loop function consisting of a single subtraction at the single glueball resonance pole. We show that this choice is inconsistent as it leads to the emergence of a ghost-like state with negative norm. T

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HUANG, KERSON. "DARK ENERGY AND DARK MATTER IN A SUPERFLUID UNIVERSE." International Journal of Modern Physics A 28, no. 28 (2013): 1330049. http://dx.doi.org/10.1142/s0217751x13300494.

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The vacuum is filled with complex scalar fields, such as the Higgs field. These fields serve as order parameters for superfluidity (quantum phase coherence over macroscopic distances), making the entire universe a superfluid. We review a mathematical model consisting of two aspects: (a) emergence of the superfluid during the big bang; (b) observable manifestations of superfluidity in the present universe. The creation aspect requires a self-interacting scalar field that is asymptotically free, i.e. the interaction must grow from zero during the big bang, and this singles out the Halpern–Huang

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McGrath, Robert E. "Measurement Invariance in Translations of the VIA Inventory of Strengths." European Journal of Psychological Assessment 32, no. 3 (2016): 187–94. http://dx.doi.org/10.1027/1015-5759/a000248.

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Abstract. The VIA Classification of Character Strengths and Virtues ( Peterson & Seligman, 2004 ) has been an influential contribution to the study of prosocial traits, and provided the basis for the VIA Inventory of Strengths (VIA-IS). Inherent to the Classification is the assumption that the character strengths included in the model are cross-culturally relevant. The emergence of a latent trait model for the VIA Classification from exploratory factor analytic research and the availability of data from translated versions of the VIA-IS provides a basis for evaluating this assumption. A sa

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Verma, Murli Manohar, and Bal Krishna Yadav. "Dynamics of f(R) gravity models and asymmetry of time." International Journal of Modern Physics D 27, no. 02 (2018): 1850002. http://dx.doi.org/10.1142/s0218271818500025.

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We solve the field equations of modified gravity for [Formula: see text] model in metric formalism. Further, we obtain the fixed points of the dynamical system in phase-space analysis of [Formula: see text] models, both with and without the effects of radiation. The stability of these points is studied against the perturbations in a smooth spatial background by applying the conditions on the eigenvalues of the matrix obtained in the linearized first-order differential equations. Following this, these fixed points are used for analyzing the dynamics of the system during the radiation, matter an

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Cvetič, Mirjam, Paulo J. Porfírio, and Alejandro Satz. "Gaussian null coordinates, near-horizon geometry and conserved charges on the horizon of extremal nondilatonic black p-branes." International Journal of Modern Physics D 29, no. 11 (2020): 2041004. http://dx.doi.org/10.1142/s0218271820410047.

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In this paper, we examine the emergence of conserved charges on the horizon of a particular class of extremal nondilatonic black [Formula: see text]-branes (which reduce to extremal dilatonic black holes in [Formula: see text] dimensions upon toroidal compactification) in the presence of a probe massless scalar field in the bulk. This result is achieved by writing the black [Formula: see text]-brane geometry in a Gaussian null coordinate system which allows us to get a nonsingular near-horizon geometry description. We find that the near-horizon geometry is [Formula: see text] and that the [For

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Boudet, S., F. Bombacigno, F. Moretti, and Gonzalo J. Olmo. "Torsional birefringence in metric-affine Chern-Simons gravity: gravitational waves in late-time cosmology." Journal of Cosmology and Astroparticle Physics 2023, no. 01 (2023): 026. http://dx.doi.org/10.1088/1475-7516/2023/01/026.

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Abstract In the context of the metric-affine Chern-Simons gravity endowed with projective invariance, we derive analytical solutions for torsion and nonmetricity in the homogeneous and isotropic cosmological case, described by a flat Friedmann-Robertson-Walker metric. We discuss in some details the general properties of the cosmological solutions in the presence of a perfect fluid, such as the dynamical stability and the emergence of big bounce points, and we examine the structure of some specific solutions reproducing de Sitter and power law behaviours for the scale factor. Then, we focus on

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de Brito, G. P., and A. de Souza Dutra. "Orbit based procedure for doublets of scalar fields and the emergence of triple kinks and other defects." Physics Letters B 736 (September 2014): 438–45. http://dx.doi.org/10.1016/j.physletb.2014.07.063.

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Matacz, A. L. "The emergence of classical behaviour in the quantum fluctuations of a scalar field in an expanding universe." Classical and Quantum Gravity 10, no. 3 (1993): 509–15. http://dx.doi.org/10.1088/0264-9381/10/3/011.

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Hornberger, Nancy H. "Reflect, Revisit, Reimagine: Ethnography of Language Policy and Planning." Annual Review of Applied Linguistics 40 (March 2020): 119–27. http://dx.doi.org/10.1017/s026719052000001x.

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AbstractTracing applied linguists’ interests in language policy and planning (LPP) as reflected in the pages of the Annual Review of Applied Linguistics since its founding in 1980, I focus on the emergence of, and current boom in, ethnographic LPP research. I draw on the ethnographic concept of ideological and implementational LPP spaces as scalar, layered policies and practices influencing each other, mutually reinforcing, wedging, and transforming ideology through implementation and vice versa. Doing so highlights how the perennial policy-practice gap is given nuance through exploration of t

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Addazi, Andrea, Alexey S. Koshelev, Shi Pi, and Anna Tokareva. "Secondary gravitational waves in non-local Starobinsky inflation." Journal of Cosmology and Astroparticle Physics 2025, no. 06 (2025): 017. https://doi.org/10.1088/1475-7516/2025/06/017.

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Abstract We show how infinite derivative modifications of gravity impact on the stochastic background of Gravitational Waves from early Universe. The generic property of the ghost-free theory fixed on Minkowski space-time is the emergence of an infinite number of complex mass states when other classical backgrounds are considered. These additional states are shown to enhance the power spectrum of scalar perturbations generated during inflation. Current and future space-based and terrestrial interferometers offer indirect testing methods for the infinite derivative gravity action, enabling the

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Bettoni, Dario, and Javier Rubio. "Quintessential Inflation: A Tale of Emergent and Broken Symmetries." Galaxies 10, no. 1 (2022): 22. http://dx.doi.org/10.3390/galaxies10010022.

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Quintessential inflation provides a unified description of inflation and dark energy in terms of a single scalar degree of freedom, the cosmon. We present here a comprehensive overview of this appealing paradigm, highlighting its key ingredients and keeping a reasonable and homogeneous level of details. After summarizing the cosmological evolution in a simple canonical case, we discuss how quintessential inflation can be embedded in a more general scalar-tensor formulation and its relation to variable gravity scenarios. Particular emphasis is placed on the role played by symmetries. In particu

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Ratliff, Daniel J., and Thomas J. Bridges. "Multiphase wavetrains, singular wave interactions and the emergence of the Korteweg–de Vries equation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2196 (2016): 20160456. http://dx.doi.org/10.1098/rspa.2016.0456.

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Multiphase wavetrains are multiperiodic travelling waves with a set of distinct wavenumbers and distinct frequencies. In conservative systems, such families are associated with the conservation of wave action or other conservation law. At generic points (where the Jacobian of the wave action flux is non-degenerate), modulation of the wavetrain leads to the dispersionless multiphase conservation of wave action. The main result of this paper is that modulation of the multiphase wavetrain, when the Jacobian of the wave action flux vector is singular, morphs the vector-valued conservation law into

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Srivastava, S. K., and K. P. Sinha. "Emergence of Spinless and Spin-1/2 Particles from Higher-Dimensional Gravity with D-Dimensional Torus as a Compact Manifold." Modern Physics Letters A 12, no. 38 (1997): 2933–42. http://dx.doi.org/10.1142/s0217732397003058.

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Using gravitational action for four-dimensional theory of R2-gravity, it has been shown earlier that, at high energy level, Ricci scalar R behaves like a physical field in addition to its usual nature as a geometrical field. The physical aspect of R is represented by spinless particles, called riccions. It is shown here that riccions can also be obtained from multi-dimensional R2-gravity. Further it is shown that these riccions disintegrate into fermion and anti-fermion pairs under certain conditions. Some physical properties of these fermions (here called riccinos) are discussed. On the basis

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Cicalese, Marco, Matthias Ruf, and Francesco Solombrino. "Chirality transitions in frustrated S2-valued spin systems." Mathematical Models and Methods in Applied Sciences 26, no. 08 (2016): 1481–529. http://dx.doi.org/10.1142/s0218202516500366.

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We study the discrete-to-continuum limit of the helical XY [Formula: see text]-spin system on the lattice [Formula: see text]. We scale the interaction parameters in order to reduce the model to a spin chain in the vicinity of the Landau–Lifschitz point and we prove that at the same energy scaling under which the [Formula: see text]-model presents scalar chirality transitions, the cost of every vectorial chirality transition is zero. In addition we show that if the energy of the system is modified penalizing the distance of the [Formula: see text]-field from a finite number of copies of [Formu

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Yu, Chao, and Jia-Rui Sun. "Note on acoustic black holes from black D3-brane." International Journal of Modern Physics D 28, no. 07 (2019): 1950095. http://dx.doi.org/10.1142/s0218271819500950.

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Black D3-branes are known to admit an effective hydrodynamic description when low frequency and long wavelength perturbations are introduced into the system. We use this perturbed nonextremal black D3-brane as background metric to study the emergence of acoustic black holes, following the same holographic approach in constructing the acoustic black hole in asymptotically Anti-de-Sitter (AAdS) background spacetime. We show that the acoustic black hole which appears on the timelike cutoff surface in the nonextremal black D3-brane also admits a holographic dual description. The duality includes t

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Hao, Chen-Hao, Shi-Xian Sun, Long-Xing Huang, Rong Zhang, Xin Su, and Yong-Qiang Wang. "Dirac stars in wormhole spacetime." Journal of Cosmology and Astroparticle Physics 2024, no. 04 (2024): 057. http://dx.doi.org/10.1088/1475-7516/2024/04/057.

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Abstract In this paper, we study the spherically symmetric Dirac star model in the presence of a phantom field, obtaining a traversable wormhole solution in non-trivial topological spacetime. This solution exhibits asymmetry in both the field configuration and the metric and possesses a finite ADM mass M and Noether charge Q. Furthermore, due to a wormhole at the center, this solution exhibits many differences from the Dirac star under trivial spacetime. Notably, when the wormhole throat size is small, our numerical calculations indicate the emergence of an extremely approximate black hole sol

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Guennou, Chloé, Etienne Pariat, James E. Leake, and Nicole Vilmer. "Testing predictors of eruptivity using parametric flux emergence simulations." Journal of Space Weather and Space Climate 7 (2017): A17. http://dx.doi.org/10.1051/swsc/2017015.

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Solar flares and coronal mass ejections (CMEs) are among the most energetic events in the solar system, impacting the near-Earth environment. Flare productivity is empirically known to be correlated with the size and complexity of active regions. Several indicators, based on magnetic field data from active regions, have been tested for flare forecasting in recent years. None of these indicators, or combinations thereof, have yet demonstrated an unambiguous eruption or flare criterion. Furthermore, numerical simulations have been only barely used to test the predictability of these parameters.

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Etxeberria, Urtzi, and Aritz Irurtzun. "The emergence of scalar meanings." Frontiers in Psychology 6 (February 19, 2015). http://dx.doi.org/10.3389/fpsyg.2015.00141.

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Girelli, F., S. Liberati, and L. Sindoni. "Emergence of Lorentzian signature and scalar gravity." Physical Review D 79, no. 4 (2009). http://dx.doi.org/10.1103/physrevd.79.044019.

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