Results 91 to 100 of about 52,296 (249)

Einstein, Planck and Vera Rubin: Relevant Encounters Between the Cosmological and the Quantum Worlds

Frontiers in Physics, 2021
In Cosmology and in Fundamental Physics there is a crucial question like: where the elusive substance that we call Dark Matter is hidden in the Universe and what is it made of?
Paolo Salucci, Giampiero Esposito, Gaetano Lambiase, Emmanuele Battista, Emmanuele Battista, Emmanuele Battista, Micol Benetti, Micol Benetti, Donato Bini, Donato Bini, Lumen Boco, Gauri Sharma, Valerio Bozza, Luca Buoninfante, Antonio Capolupo, Salvatore Capozziello, Salvatore Capozziello, Giovanni Covone, Giovanni Covone, Rocco D’Agostino, Rocco D’Agostino, Mariafelicia De Laurentis, Mariafelicia De Laurentis, Ivan De Martino, Ivan De Martino, Giulia De Somma, Giulia De Somma, Elisabetta Di Grezia, Chiara Di Paolo, Lorenzo Fatibene, Viviana Gammaldi, Andrea Geralico, Andrea Geralico, Lorenzo Ingoglia, Andrea Lapi, Giuseppe G. Luciano, Leonardo Mastrototaro, Adele Naddeo, Lara Pantoni, Luciano Petruzziello, Luciano Petruzziello, Ester Piedipalumbo, Ester Piedipalumbo, Silvia Pietroni, Aniello Quaranta, Paolo Rota, Giuseppe Sarracino, Francesco Sorge, Antonio Stabile, Cosimo Stornaiolo, Antonio Tedesco, Riccardo Valdarnini, Stefano Viaggiu, Stefano Viaggiu, Andy A. V. Yunge   +54 more
doaj   +1 more source

Immanent Idealism

Journal for the Theory of Social Behaviour, Volume 55, Issue 3, September 2025.
ABSTRACT This article introduces immanent idealism as an alternative path in social ontology and theory. It argues for a distinction between three basic ontological dimensions, the ideational, the institutional and the structural. This approach highlights the cognitional priority of worldviews as the core element of the ideational dimension, and it ...
Christoforos Bouzanis
wiley   +1 more source

A Wheeler–DeWitt Quantum Approach to the Branch-Cut Gravitation with Ordering Parameters

Universe, 2023
In this contribution to the Festschrift for Prof. Remo Ruffini, we investigate a formulation of quantum gravity using the Hořava–Lifshitz theory of gravity, which is General Relativity augmented by counter-terms to render the theory regularized.
Benno August Ludwig Bodmann, César Augusto Zen Vasconcellos, Peter Otto Hess Bechstedt, José Antonio de Freitas Pacheco, Dimiter Hadjimichef, Moisés Razeira, Gervásio Annes Degrazia   +6 more
doaj   +1 more source

Gauge invariance in Loop Quantum Cosmology : Hamilton-Jacobi and Mukhanov-Sasaki equations for scalar perturbations

, 2011
Gauge invariance of scalar perturbations is studied together with the associated equations of motion. Extending methods developed in the framework of hamiltonian General Relativity, the Hamilton-Jacobi equation is investigated into the details in Loop ...
Barrau, Aurelien, Cailleteau, Thomas
core   +3 more sources

Time‐Resolved Leader Spectra of Downward Terrestrial Gamma‐Ray Flashes Observed at the Telescope Array Surface Detector

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 16, 28 August 2025.
Abstract The first time‐resolved leader spectra associated with a downward Terrestrial Gamma‐ray Flash (TGF) observed by the Telescope Array Surface Detector (TASD) were recently reported by Kieu et al. (2024, https://doi.org/10.1029/2024JD041720). Building on that study, this paper presents the time‐resolved leader spectra of two additional downward ...
N. Kieu, R. U. Abbasi, M. M. F. Saba, P. R. Krehbiel, F. J. Gordillo‐Vazquez, M. A. Stanley, D. R. da Silva, J. W. Belz, T. Warner, W. Rison, D. Rodeheffer, I. T. Cruz, D. Mazzucco, T. Knight, J. Remington, J. Mazich, R. LeVon, K. Smout, A. Petrizze, T. Abu‐Zayyad, M. Allen, D. R. Bergman, I. Buckland, W. Campbell, B. G. Cheon, K. Endo, A. Fedynitch, T. Fujii, K. Fujisue, K. Fujita, M. Fukushima, G. Furlich, Z. Gerber, N. Globus, W. Hanlon, N. Hayashida, H. He, K. Hibino, R. Higuchi, D. Ikeda, T. Ishii, D. Ivanov, S. Jeong, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, Y. Kawachi, K. Kawata, I. Kharuk, E. Kido, H. B. Kim, J. H. Kim, J. H. Kim, S. W. Kim, R. Kobo, I. Komae, K. Komatsu, K. Komori, C. Koyama, M. Kudenko, M. Kuroiwa, Y. Kusumori, M. Kuznetsov, Y. J. Kwon, K. H. Lee, M. J. Lee, B. Lubsandorzhiev, J. P. Lundquist, A. Matsuzawa, H. Matsushita, J. A. Mathews, J. N. Matthews, K. Mizuno, M. Mori, M. Murakami, S. Nagataki, K. Nakagawa, M. Nakahara, T. Nakamura, T. Nakayama, Y. Nakayama, T. Nonaka, S. Ogio, H. Ohoka, N. Okazaki, M. Onishi, A. Oshima, H. Oshima, S. Ozawa, I. H. Park, K. Y. Park, M. Potts, M. Przybylak, M. S. Pshirkov, C. Rott, G. I. Rubtsov, D. Ryu, H. Sagawa, N. Sakaki, R. Sakamoto, T. Sako, N. Sakurai, S. Sakurai, D. Sato, S. Sato, K. Sekino, T. Shibata, J. Shikita, H. Shimodaira, H. S. Shin, B. K. Shin, K. Shinozaki, J. D. Smith, P. Sokolsky, B. T. Stokes, T. A. Stroman, H. Tachibana, Y. Takagi, K. Takahashi, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, T. Tomida, S. Troitsky, Y. Tsunesada, S. Udo, F. Urban, I. A. Vaiman, M. Vrábel, D. Warren, K. Yamazaki, Y. Zhezher, Z. Zundel, J. Zvirzdin   +143 more
wiley   +1 more source

The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post‐War Period**

Berichte zur Wissenschaftsgeschichte, Volume 48, Issue 1-2, Page 143-162, August 2025.
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Jean‐Philippe Martinez
wiley   +1 more source

A Non-Polynomial Gravity Formulation for Loop Quantum Cosmology Bounce

Galaxies, 2017
Recently the so-called mimetic gravity approach has been used to obtain corrections to the Friedmann equation of General Relativity similar to the ones present in loop quantum cosmology.
Stefano Chinaglia, Aimeric Colléaux, Sergio Zerbini   +2 more
doaj   +1 more source

Quantum Gravity: General Introduction and Recent Developments

, 2005
I briefly review the current status of quantum gravity. After giving some general motivations for the need of such a theory, I discuss the main approaches in quantizing general relativity: Covariant approaches (perturbation theory, effective theory, and ...
Aharony, Amati, Ashtekar, Barbour, Bjerrum-Bohr, Blais, Bojowald, Borde, Brunnemann, Carlip, Carr, Coule, D'Eath, de Calan, Demers, Domagala, Goroff, Grøn, Halliwell, Hartle, Hawking, Hawking, Horowitz, Husain, Hájíček, Isham, Joos, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kimberly, Lauscher, Lin, Lämmerzahl, Majid, Meissner, Myers, Nicolai, Ooguri, Ooguri, Page, Polchinski, Reuter, Reuter, rn, Rosenfeld, Rovelli, Rovelli, Shepard, Thiemann, Weinberg, Wiltshire, Witten, Zeh, Zeh   +59 more
core   +1 more source

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

Consistent discrete gravity solution of the problem of time: a model

, 2003
The recently introduced consistent discrete lattice formulation of canonical general relativity produces a discrete theory that is constraint-free. This immediately allows to overcome several of the traditional obstacles posed by the ``problem of time ...
Gambini, Rodolfo, Porto, Rafael, Pullin, Jorge   +2 more
core   +1 more source