Results 71 to 80 of about 1,108,506 (294)
Higher-Dimensional Regular Reissner–Nordström Black Holes Associated with Linear Electrodynamics
Universe, 2022 Following the interpretation of matter source that the energy-momentum tensor of anisotropic fluid can be dealt with effectively as the energy-momentum tensor of perfect fluid plus linear (Maxwell) electromagnetic field, we obtain the regular higher ...
Yu-Mei Wu, Yan-Gang Miao
doaj +1 more source
The Lorentzian distance formula in noncommutative geometry [PDF]
, 2017 For almost twenty years, a search for a Lorentzian version of the well-known Connes’ distance formula has been undertaken. Several authors have contributed to this search, providing important milestones, and the time has now come to put those elements ...
N. Franco
semanticscholar +1 more source
A walk in the noncommutative garden [PDF]
, 2006 This text is written for the volume of the school/conference "Noncommutative Geometry 2005" held at IPM Tehran. It gives a survey of methods and results in noncommutative geometry, based on a discussion of significant examples of noncommutative spaces in
Connes, Alain, Marcolli, Matilde
core +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT We investigate the effects of a minimal measurable length on neutron stars, within the quantum hadrodynamics (QHD‐I) model modified by the Generalized Uncertainty Principle (GUP). Working in a deformed Poisson algebra framework, we incorporate GUP effects via a time‐invariant transformation of the phase space volume, effectively reducing the ...
João Gabriel Galli Gimenez +2 more
wiley +1 more source
MIRROR FERMIONS IN NONCOMMUTATIVE GEOMETRY [PDF]
Modern Physics Letters A, 1998 In a recent paper we pointed out the presence of extra fermionic degrees of freedom in a chiral gauge theory based on Connes' noncommutative geometry. Here we propose a mechanism which provides a high mass to these mirror states, so that they decouple from low energy physics.
LIZZI F. +3 more
openaire +7 more sources
Heisenberg‐smooth operators from the phase‐space perspective
Mathematische Nachrichten, EarlyView.Abstract Cordes' characterization of Heisenberg‐smooth operators bridges a gap between the theory of pseudo‐differential operators and quantum harmonic analysis (QHA). We give a new proof of the result by using the phase‐space formalism of QHA. Our argument is flexible enough to generalize Cordes' result in several directions: (1) we can admit general ...
Robert Fulsche, Lauritz van Luijk
wiley +1 more source
Noncommutative geometry and reality [PDF]
Journal of Mathematical Physics, 1995 We introduce the notion of real structure in our spectral geometry. This notion is motivated by Atiyah’s KR-theory and by Tomita’s involution J. It allows us to remove two unpleasant features of the ‘‘Connes–Lott’’ description of the standard model, namely, the use of bivector potentials and the asymmetry in the Poincaré duality and in the ...
openaire +3 more sources
Noncommutativity and the weak cosmic censorship
Journal of High Energy Physics, 2019 We show that a noncommutative massless scalar probe can dress a naked singularity in AdS3 spacetime, consistent with the weak cosmic censorship. The dressing occurs at high energies, which is typical at the Planck scale.
Kumar S. Gupta +3 more
doaj +1 more source
Massive Neutron Stars and White Dwarfs as Noncommutative Fuzzy Spheres
Universe, 2022 Over the last couple of decades, there have been direct and indirect evidences for massive compact objects than their conventional counterparts. A couple of such examples are super-Chandrasekhar white dwarfs and massive neutron stars. The observations of
Surajit Kalita, Banibrata Mukhopadhyay
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The Ricci curvature in noncommutative geometry [PDF]
Journal of Noncommutative Geometry, 2016 Motivated by the local formulae for asymptotic expansion of heat kernels in spectral geometry, we propose a definition of Ricci curvature in noncommutative settings.
R. Floricel +2 more
semanticscholar +1 more source