Results 51 to 60 of about 99,723 (258)
HOMOTHETIC WYMAN SPACETIMES [PDF]
International Journal of Modern Physics D, 1998 The time-dependent, spherically symmetric, Wyman sector of the Unified Field Theories is shown to be equivalent to a self-gravitating scalar field with a positive-definite, repulsive interaction potential. A homothetic symmetry is imposed on the fundamental tensor, and the resulting autonomous system is numerically integrated. Near the critical point (
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Fundamental photon orbits: Black hole shadows and spacetime instabilities [PDF]
, 2017 The standard black holes (BHs) in general relativity, as well as other ultracompact objects (with or without an event horizon) admit planar circular photon orbits. These light rings (LRs) determine several spacetime properties.
P. Cunha, C. Herdeiro, E. Radu
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No Smooth Beginning for Spacetime. [PDF]
Physical Review Letters, 2017 We identify a fundamental obstruction to any theory of the beginning of the Universe, formulated as a semiclassical path integral. The Hartle-Hawking no boundary proposal and Vilenkin's tunneling proposal are examples of such theories.
Job Leon Feldbrugge +2 more
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Building up spacetime with quantum entanglement [PDF]
, 2010 In this essay, we argue that the emergence of classically connected spacetimes is intimately related to the quantum entanglement of degrees of freedom in a non-perturbative description of quantum gravity.
Mark Van Raamsdonk
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Spacetime encodings. I. A spacetime reconstruction problem [PDF]
Physical Review D, 2008 This paper explores features of an idealized mathematical machine (algorithm) that would be capable of reconstructing the gravitational nature (the multipolar structure or spacetime metric) of a compact object, by observing gravitational radiation emitted by a small object that orbits and spirals into it.
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Journal of High Energy PhysicsA correction to this paper has been published: https://doi.org/10.1007/JHEP07(2025 ...
Julian De Vuyst +3 more
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Advanced Science, EarlyView.Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel +3 more
wiley +1 more source
Virasoro irregular conformal block and beta deformed random matrix model
Physics Letters B, 2015 Virasoro irregular conformal block is presented as the expectation value of Jack-polynomials of the beta-deformed Penner-type matrix model and is compared with the inner product of Gaiotto states with arbitrary rank.
Sang Kwan Choi, Chaiho Rim, Hong Zhang
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Rotating effects on the scalar field in the cosmic string spacetime, in the spacetime with space-like dislocation and in the spacetime with a spiral dislocation [PDF]
, 2018 In the interface between general relativity and relativistic quantum mechanics, we analyse rotating effects on the scalar field subject to a hard-wall confining potential.
R. Vitória, K. Bakke
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Scrambling‐Enhanced Quantum Battery Charging in Black Hole Analogues
Advanced Science, EarlyView.By employing a black‐hole‐analog quantum battery constructed from a position‐dependent XY model, its dynamical behavior is investigated through a quench of the scrambling parameter. It is systematically quantified that how the simulated scrambling improves key performance metrics‐namely, stored energy, peak power, and charging time‐thereby offering a ...
Zhilong Liu +3 more
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