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Дисертації з теми "Entropic gravity"

Автор: Grafiati

Опубліковано: 7 червня 2025

Оновлено: 2 серпня 2025

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1

Pranzetti, Daniele. "TQFT and Loop Quantum Gravity : 2+1 Theory and Black Hole Entropy." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10032.

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Ce travail de thèse se concentre sur l'approche non-perturbative canonique à la formulation d'une théorie quantique de la gravitation dans le cadre de la Gravitation quantique à boucles (LQG), répondant à deux problèmes majeurs. Dans la première partie, nous étudions la possible quantification, dans le cadre de la LQG, de la gravité en trois dimensions avec constante cosmologique et nous essayons de prendre contact avec autres approches de quantification déjà existantes dans la littérature. Dans la deuxième partie, nous nous concentrons sur une application très importante de la LQG: la définit

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2

Nishioka, Tatsuma. "Black Hole Entropy in Gauge/Gravity Duality." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120652.

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3

Flory, Mario [Verfasser], and Johanna [Akademischer Betreuer] Erdmenger. "Entanglement and defect entropies in gauge/gravity duality / Mario Flory. Betreuer: Johanna Erdmenger." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1112465731/34.

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4

Yokokura, Yuki. "A Self-consistent Model of the Black Hole Evaporation and Entropy in Gravity." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188488.

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5

Michel, Marco [Verfasser], and Georgi [Akademischer Betreuer] Dvali. "Quantum gravity and quantum information : on systems of enhanced microstate entropy / Marco Michel ; Betreuer: Georgi Dvali." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1241963835/34.

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6

Petrov, Pavel. "Effect of Curvature Squared Corrections to Gravitational Action on Viscosity-to-Entropy Ratio of the Dual Gauge Theory." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10549.

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Анотація:

In this thesis we study the properties of strongly-coupled large-N conformal ﬁeld theories (CFT’s) using AdS/CFT correspondence. Chapter 1 serves as an introduction. In Chapter 2 we study the shear viscosity of strongly-coupled large-N conformal ﬁeld theories. We find that it is affected by \(R^2\) corrections to the AdS action and present an example of 4D theory in which the the conjectured universal lower bound on viscosity-to-entropy ratio \(\eta/s > 1/4 \pi\) is violated by 1/N corrections. This fact proves that there is no universal lower bound of \(1/4 \pi\) on viscosity-to-entropy ratio

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7

Josset, Thibaut. "Vers une formulation covariante de la mécanique statistique." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0272.

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D’après la relativité générale, l’espace-temps n’est pas l’arène absolue imaginée par Newton, dans laquelle les particules se meuvent, sont créées ou annihilées. Au contraire, il s’agit d’un objet dynamique, identifié au champ gravitationnel, qui possède ses propres degrés de liberté locaux et, en tant que tel, peut être sujet à des fluctuations thermiques. Une meilleure compréhension des propriétés statistiques de ces fluctuations locales est essentielle pour la cosmologie primordiale, la gravité quantique, ou encore l’étude des trous noirs. Malheureusement, l’application de la mécanique stat

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8

Kissler, Stephen Michael. "Geographic and demographic transmission patterns of the 2009 A/H1N1 influenza pandemic in the United States." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273772.

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This thesis describes how transmission of the 2009 A/H1N1 influenza pandemic in the United States varied geographically, with emphasis on population distribution and age structure. This is made possible by the availability of medical claims records maintained in the private sector that capture the weekly incidence of influenza-like illness in 834 US cities. First, a probabilistic method is developed to infer each city's outbreak onset time. This reveals a clear wave-like pattern of transmission originating in the south-eastern US. Then, a mechanistic mathematical model is constructed to descri

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9

Sanders, Jessica R. "Actions/Objects: A Knotting." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276036952.

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10

Ingram, David. "Using systems theory to do philosophy : one approach, and some suggested terminology : a thesis submitted in fulfilment of the requirements for the degree of Master of Arts in Philosophy in the University of Canterbury /." Thesis, University of Canterbury. Philosophy and Religious Studies, 2007. http://hdl.handle.net/10092/1022.

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This thesis employs perspectives inspired by General Systems Theory to address issues in philosophy, including moral philosophy and philosophy of mind. I present an overview of a range of ideas from the study of physical systems that may be used to provide a firm physicalist foundation to explorations of some common questions in philosophy. I divide these topics into three categories: the Physical Category, the Relevance Category and the Signal Elements Category. I interpret concepts from General Systems Theory, including information and entropy, in a way that I believe facilitates their incor

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11

Wang, Chiao-Hsuan, and 王喬萱. "Where is hbar hiding in entropic gravity?" Thesis, 2012. http://ndltd.ncl.edu.tw/handle/65191585130299831479.

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碩士<br>國立臺灣大學<br>物理研究所<br>100<br>The entropic gravity scenario recently proposed by Erik Verlinde reproduced the Newton''s law of purely classical gravity yet the key assumptions of this approach all have quantum mechanical origins. So one naturally wonders: where is $hbar$ hiding in entropic gravity? To address this question, we first reformulate the entropic derivation of Newton''s gravitation force law to address a self-consistent approach to the problem. Next we argue that as the concept of minimal length has been invoked in the Bekenstein entropic derivation, the genera

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12

Donnelly, William. "Entanglement Entropy in Quantum Gravity." Thesis, 2008. http://hdl.handle.net/10012/3734.

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We study a proposed statistical explanation for the Bekenstein-Hawking entropy of a black hole in which entropy arises quantum-mechanically as a result of entanglement. Arguments for the identification of black hole entropy with entanglement entropy are reviewed in the framework of quantum field theory, emphasizing the role of renormalization and the need for a physical short-distance cutoff. Our main novel contribution is a calculation of entanglement entropy in loop quantum gravity. The kinematical Hilbert space and spin network states are introduced, and the entanglement entropy of these s

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13

Bhattacharyya, Arpan. "Lessons for Gravity from Entanglement." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/4801.

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One of the recent fundamental developments in theoretical high energy physics is the AdS/CFT correspondence [1, 2, 3, 4] which posits a relationship between Quantum Field Theories (QFT) in a given dimension and String Theory on a higher dimensional anti- de Sitter (AdS) spacetime. This has revolutionised our understanding of QFTs (more speci fically conformal fi eld theories (CFTs)) and string theory/gravity, and has far reaching consequences for explorations into a vast array of physical phenomena. Using the elegant formalism provided by this powerful duality, often called \holography",

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14

Mei, Jianwei. "Black Holes And Their Entropy." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8278.

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This dissertation covers two di erent but related topics: the construction of new black hole solutions and the study of the microscopic origin of black hole entropy. In the solution part, two di erent sets of new solutions are found. The rst concerns a Plebanski-Demianski type solution in the ve-dimensional pure Einstein gravity, and the second concerns a three-charge (two of which equal) two-rotation solution to the ve-dimensional maximal supergravity. Obtaining new and interesting black hole solutions is an important and challenging task in studying general relativity and its extensions.

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15

Engle, Jonathan Steven. "Black hole entropy, constraints, and symmetry in quantum gravity." 2006. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-1490/index.html.

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16

Wei-MingHo and 何偉銘. "A Modified Entropy-based Dynamic Gravity Model for the Evacuation Trip Distribution Problem under the Impact of Typhoons." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/30160240292539276077.

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博士<br>國立成功大學<br>交通管理科學系<br>103<br>The ability to predict the impact of typhoons on the transportation infrastructure is important, as it can help to avoid serious delays when roads are closed due to such events. Typhoon Morakot, which formed on August 2, 2009, was the deadliest typhoon in Taiwan’s history, responsible for over 700 deaths on the island. During the typhoon evacuation process, one critical issue is how to efficiently distribute evacuation trips to a limited number of shelters based on both temporal and spatial considerations. This research focuses on the prediction of typhoon

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17

"Emergence of Spacetime: From Entanglement to Einstein." Doctoral diss., 2020. http://hdl.handle.net/2286/R.I.62650.

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abstract: Here I develop the connection between thermodynamics, entanglement, and gravity. I begin by showing that the classical null energy condition (NEC) can arise as a consequence of the second law of thermodynamics applied to local holographic screens. This is accomplished by essentially reversing the steps of Hawking's area theorem, leading to the Ricci convergence condition as an input, from which an application of Einstein's equations yields the NEC. Using the same argument, I show logarithmic quantum corrections to the Bekenstein-Hawking entropy formula do not alter the form of the R

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18

Mukherjee, Jyotirmoy. "Entanglement properties of gauge theories and the graviton." Thesis, 2023. https://etd.iisc.ac.in/handle/2005/6158.

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Entanglement entropy is emerging as a useful quantity to study critical phenomena in quantum systems, black holes physics, and holography. In this presentation, we discuss entanglement properties of gauge theories and the graviton in the ground state as well as excited states corresponding to local quenches. We show that the quantum entanglement entropy of the ground state of the free Maxwell field in d=4 dimensions, conformal p-forms, and conformal higher spins can be obtained from the partition function on the hyperbolic cylinder. We demonstrate that the entanglement entropy of l

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19

Datta, Shouvik. "Higher Spins, Entanglement Entropy And Holography." Thesis, 2015. https://etd.iisc.ac.in/handle/2005/2653.

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The idea of holography [1, 2] finds a concrete realization in form of the AdS/CFT correspondence [3, 4]. This duality relates a field theory with conformal symmetries to quantum gravity living in one higher dimension. In this thesis we study aspects of black hole quasinormal modes, higher spin theories and entanglement entropy in the context of this duality. In almost all cases we have been able to subject the duality to some precision tests. Quasinormal modes encode the spectrum of black holes and the time-scale of pertur- bations therein [5]. From the dual CFT viewpoint they are the poles

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20

Datta, Shouvik. "Higher Spins, Entanglement Entropy And Holography." Thesis, 2015. http://etd.iisc.ernet.in/handle/2005/2653.

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Анотація:

The idea of holography [1, 2] finds a concrete realization in form of the AdS/CFT correspondence [3, 4]. This duality relates a field theory with conformal symmetries to quantum gravity living in one higher dimension. In this thesis we study aspects of black hole quasinormal modes, higher spin theories and entanglement entropy in the context of this duality. In almost all cases we have been able to subject the duality to some precision tests. Quasinormal modes encode the spectrum of black holes and the time-scale of pertur- bations therein [5]. From the dual CFT viewpoint they are the poles o

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