Results 81 to 90 of about 268,972 (205)
, 2015 The authors discuss contradictions between the principal branches of the modern physical picture of the universe. Space and time have been shown in the Unitary Quantum Theory (UQT) not to be connected one with the other, unlike in the Special Theory of ...
L. G. Sapogin +5 more
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Unifying physics theories with a single postulate
Physics OpenHumans have developed mathematical theories to explain observed physical phenomena in nature. However, the links between these theories are not fully understood in 2024.
F. Salmon
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Quantum Spacetimes from General Relativity?
Journal of Geometry and PhysicsWe introduce a non-commutative product for curved spacetimes, that can be regarded as a generalization of the Rieffel (or Moyal-Weyl) product. This product employs the exponential map and a Poisson tensor, and the deformed product maintains associativity under the condition that the Poisson tensor $Θ$ satisfies $Θ^{μν}\nabla_νΘ^{ρσ}=0$, in relation to ...
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Definition and classification of singularities in GR: classical and quantum
, 2004 We will briefly review the definition and classification of classical and quantum singularities in general relativity. Examples of classically singular spacetimes that do not have quantum singularities will be given.
Helliwell, T. M., Konkowski, D. A.
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Does time exist in quantum gravity?
Zagadnienia Filozoficzne w Nauce, 2015 Time is absolute in standard quantum theory and dynamical in general relativity. The combination of both theories into a theory of quantum gravity leads therefore to a “problem of time”.
Claus Kiefer
doaj
General Covariance and Background Independence in Quantum Gravity [PDF]
, 2012 The history of general relativity suggests that in absence of experimental data, constructing a theory on philosophical first principles can lead to a very useful theory as well as to ground-breaking insights about physical reality.
Bärenz, Manuel
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Scattering of fermions in the Yukawa theory coupled to unimodular gravity
European Physical Journal C: Particles and Fields, 2018 We compute the lowest order gravitational UV divergent radiative corrections to the S matrix element of the $$fermion + fermion\rightarrow fermion + fermion$$ fermion+fermion→fermion+fermion scattering process in the massive Yukawa theory, coupled either
S. Gonzalez-Martin, C. P. Martin
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From General Relativity to Quantum Gravity
, 2014 In general relativity (GR), spacetime geometry is no longer just a background arena but a physical and dynamical entity with its own degrees of freedom. We present an overview of approaches to quantum gravity in which this central feature of GR is at the
Ashtekar, Abhay +2 more
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Quantum Foam, Gravity and Gravitational Waves
, 2003 The new information-theoretic Process Physics has shown that space is a quantum foam system with gravity being, in effect, an inhomogeneous in-flow of the quantum foam into matter.
Cahill, Reginald T.
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General Relativity + Quantum mechanics --> Discretized Momentum
, 1999 The analogy between General Relativity and monopole physics is pointed out and the presence of a 3-cocycle which corresponds to a source leads to discretization of field momentum. This is analogous to the same phenomena in monopole physics.
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