Results 81 to 90 of about 254,321 (352)
Living Reviews in Relativity, 1998 The problem of finding the quantum theory of the gravitational field, and thus understanding what is quantum spacetime, is still open. One of the most active of the current approaches is loop quantum gravity. Loop quantum gravity is a mathematically well-
Rovelli Carlo
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Quantum fluctuations from thermal fluctuations in Jacobson formalism
European Physical Journal C: Particles and Fields, 2017 In the Jacobson formalism general relativity is obtained from thermodynamics. This is done by using the Bekenstein–Hawking entropy–area relation. However, as a black hole gets smaller, its temperature will increase.
Mir Faizal +5 more
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Space-time curvature of general relativity and energy density of a three-dimensional quantum vacuum
, 2015 A three-dimensional quantum vacuum condensate is introduced as a funda-mental medium from which gravity emerges in a geometro-hydrodynamic lim-it. In this approach, the curvature of space-time characteristic of general rela-tivity is obtained as a ...
D. Fiscaletti, A. Šorli
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A fundamental problem in quantizing general relativity
, 2018 We point out a fundamental problem that hinders the quantization of general relativity: quantum mechanics is formulated in terms of systems, typically limited in space but infinitely extended in time, while general relativity is formulated in terms of ...
Maccone, Lorenzo
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Advanced Functional Materials, EarlyView.This study introduces an extracorporeal hemoperfusion system incorporating porous microbeads embedded with autocatalytic ceria nanoparticles (CeNPs) for targeted reactive oxygen species (ROS) scavenging in septic shock. The blood‐compatible hemoperfusion cartridge demonstrated significant improvements in survival, hemodynamic stability, and organ ...
Pilseon Im +10 more
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Stochastic Gravity: Theory and Applications
Living Reviews in Relativity, 2004 Whereas semiclassical gravity is based on the semiclassical Einstein equation with sources given by the expectation value of the stress-energy tensor of quantum fields, stochastic semiclassical gravity is based on the Einstein-Langevin equation, which ...
Hu Bei Lok, Verdaguer Enric
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Superadditivity of Quantum Relative Entropy for General States [PDF]
IEEE Transactions on Information Theory, 2018 The property of superadditivity of the quantum relative entropy states that, in a bipartite system $\mathcal{H}_{AB}=\mathcal{H}_A \otimes \mathcal{H}_B$, for every density operator $ _{AB}$ one has $ D( _{AB} || _A \otimes _B ) \ge D( _A || _A ) +D( _B || _B) $.
Angela Capel +2 more
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Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.This study reveals that higher shell S coordination can effectively modulate the spin state of FeN4 site via long‐range electronic interactions, giving rise to the oriented generation of singlet oxygen from peroxymonosulfate activation. Abstract Precise manipulation of coordination structure of single‐atom sites and establishment of schematic ...
Liang Zhang +8 more
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Quantum Gravity in Everyday Life: General Relativity as an Effective Field Theory
Living Reviews in Relativity, 2004 This article is meant as a summary and introduction to the ideas of effective field theory as applied to gravitational systems, ideas which provide the theoretical foundations for the modern use of general relativity as a theory from which precise ...
Burgess Cliff P.
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Harmonizing General Relativity with Quantum Mechanics [PDF]
AIP Conference Proceedings, 2007 Presented at the Madrid October 17 2006 Symposium on "Frontiers of Fundamental Physics 8" and to be published by AIP Proceedings book.
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