Academic literature on the topic 'Black hole condensation'

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Journal articles on the topic "Black hole condensation"

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Vaz, Cenalo, and L. C. R. Wijewardhana. "Black Hole Bose Condensation." Journal of Physics: Conference Series 462 (December 31, 2013): 012057. http://dx.doi.org/10.1088/1742-6596/462/1/012057.

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MYUNG, YUN SOO. "TACHYON CONDENSATION AND OFF-SHELL GRAVITY/GAUGE DUALITY." International Journal of Modern Physics A 22, no. 01 (2007): 41–65. http://dx.doi.org/10.1142/s0217751x07034957.

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We investigate quasilocal tachyon condensation by using gravity/gauge duality. In order to cure the IR divergence due to a tachyon, we introduce two regularization schemes: AdS space and a d = 10 Schwarzschild black hole in a cavity. These provide stable canonical ensembles and thus are good candidates for the end point of tachyon condensation. Introducing the Cardy–Verlinde formula, we establish the on-shell gravity/gauge duality. We propose that the stringy geometry resulting from the off-shell tachyon dynamics matches onto the off-shell AdS black hole, where "off-shell" means nonequilibrium
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SUYAMA, TAKAO. "BLACK HOLE FORMATION VIA TACHYON CONDENSATION." International Journal of Modern Physics A 23, no. 14n15 (2008): 2176–77. http://dx.doi.org/10.1142/s0217751x08040743.

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We investigate a possibility for a black hole to be created during closed string tachyon condensation. For the case of a bulk closed string tachyon, we find classical solutions of a low energy effective theory which has a black hole in the space-time. On the other hand, for the case of a localized closed string tachyon, a black hole, if created, would be of the string size and it would quickly evaporate.
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Hirano, Shingo, Takashi Hosokawa, Naoki Yoshida, and Rolf Kuiper. "Supersonic gas streams enhance the formation of massive black holes in the early universe." Science 357, no. 6358 (2017): 1375–78. http://dx.doi.org/10.1126/science.aai9119.

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The origin of super-massive black holes in the early universe remains poorly understood. Gravitational collapse of a massive primordial gas cloud is a promising initial process, but theoretical studies have difficulty growing the black hole fast enough. We report numerical simulations of early black hole formation starting from realistic cosmological conditions. Supersonic gas motions left over from the Big Bang prevent early gas cloud formation until rapid gas condensation is triggered in a protogalactic halo. A protostar is formed in the dense, turbulent gas cloud, and it grows by sporadic m
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Vaz, Cenalo, and L. C. R. Wijewardhana. "Bose condensation and the BTZ black hole." Classical and Quantum Gravity 27, no. 5 (2010): 055009. http://dx.doi.org/10.1088/0264-9381/27/5/055009.

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He, Tangmei. "Black Hole Analogue in Bose–Einstein Condensation." Journal of Astrophysics and Astronomy 35, no. 3 (2014): 503–5. http://dx.doi.org/10.1007/s12036-014-9267-z.

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Strominger, Andrew. "Black hole condensation and duality in string theory." Nuclear Physics B - Proceedings Supplements 46, no. 1-3 (1996): 204–9. http://dx.doi.org/10.1016/0920-5632(96)00023-0.

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Jou, D., M. Sciacca, and M. S. Mongiovì. "Thermal duality and thermodynamics of micro black holes." International Journal of Modern Physics D 24, no. 11 (2015): 1550087. http://dx.doi.org/10.1142/s021827181550087x.

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Starting from a generalized black hole entropy with logarithmic area corrections, in this paper we obtain (for positive value of the coefficient of the correction term) a generalized equation of state for black holes with two dual branches. In one of them (the usual one for macro black holes) T ≃ 1/M, with T temperature and M mass. In the other one, for micro black holes, instead, T ≃ M. We compare the equilibrium and stability between macro black holes and electromagnetic radiation in a finite box with reflecting walls, with the dual situation corresponding to micro black holes and cosmic str
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Greene, Brian R., David R. Morrison, and Andrew Strominger. "Black hole condensation and the unification of string vacua." Nuclear Physics B 451, no. 1-2 (1995): 109–20. http://dx.doi.org/10.1016/0550-3213(95)00371-x.

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Liu, B. F., R. E. Taam, E. Qiao, and W. Yuan. "Coronal accretion: the power of X-ray emission in AGN." Proceedings of the International Astronomical Union 10, S312 (2014): 52–55. http://dx.doi.org/10.1017/s1743921315007462.

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AbstractThe optical/UV and X-ray emissions in luminous AGN are commonly believed to be produced in an accretion disk and an embedded hot corona respectively. We explore the possibility that a geometrically thick coronal gas flow, which is supplied by gravitational capture of interstellar medium or stellar wind, condenses partially to a geometrically thin cold disk and accretes via a thin disk and a corona onto the supermassive black hole. We found that for mass supply rates less than about 0.01 (expressed in Eddington units), condensation does not occur and the accretion flow takes the form of
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Dissertations / Theses on the topic "Black hole condensation"

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Farrell, Conor. "Simulating ultracold matter : horizons and slow light." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/416.

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Jain, Piyush. "Topics in ultra-cold Bose gases : the Bose-Hubbard model : analogue models for an expanding universe and for an acoustic black hole : a thesis submitted to the Victoria University of Wellington in partial fulfillment of the requirements for the degree of Doctor of Philosophy [in Physics] /." ResearchArchive@Victoria e-Thesis, 2007. http://hdl.handle.net/10063/144.

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Zielinski, Sophia [Verfasser], and Stefan [Akademischer Betreuer] Hofmann. "Spacetime geometry from graviton condensation : a new perspective on black holes / Sophia Zielinski. Betreuer: Stefan Hofmann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1098130774/34.

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Gabbanelli, Luciano. "Analysis of some classical and quantum aspects of black holes." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668189.

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For ninety years we have known that our universe is in expansion. Cosmological data favor an unknown form of intrinsic and fundamental uniform energy contributing approximately 68% of the total energy budget in the current epoch. The simplest proposal in accordance with observations is the standard cosmological model consisting of a small but positive cosmological constant producing a gravitational repulsive effect driving the accelerated expansion. In standard cosmology general relativity is assumed as the theory for gravity, which in turn predicts that a sufficiently compact mass can deform
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Ciliberto, Giorgio. "Non-locality and Back-reaction in Acoustic Black Holes and Non-linearity in Quantum Fluid Dynamics." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP174.

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Cette thèse porte essentiellement sur les corrélations quantiques et les fluctuations non-lineaires dans les fluides quantiques. Elle se concentre spéficiquement sur les fluctuations quantiques collectives, à savoir les ondes sonores, dans le flux stationnaire d'un quasi- condensat 1D de Bose-Einstein qui présente un horizon acoustique, c'est-à-dire une transition du flux d'un régime subsonique à un régime supersonique. Les phénomènes quantiques générés par la présence de l'horizon sont étudiés. La thèse présente également un bref excursus sur les turbulences dans un fluide quantique bidimensi
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Flayac, Hugo. "Nouvelles tendances dans les condensats d'exciton-polaritons spineurs : défauts topologiques et structures de basse dimensionnalité." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00822148.

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Au long de ce manuscrit de thèse je présenterai des effets non linéaires émergents dans les condensats d'exciton-polaritons spineurs. Après un chapitre d'introduction amenant les notions de bases nécessaires, je me concentrerai dans une première partie sur les défauts topologiques quantifiés par des nombres demi-entiers et discuterai leur stabilité, accélération et nucléation en présence de champs magnétiques effectifs. Nous verrons que ces objets se comportent comme des charges magnétiques manipulables démontrant une analogie fascinante avec les monopoles de Dirac. De manière remarquable nous
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Smedbäck, Mikael. "Topics on D-branes and Holography." Doctoral thesis, Uppsala University, Department of Theoretical Physics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4478.

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<p>We discuss various aspects of D-branes in string theory and holography in string theory and loop quantum gravity. </p><p>One way to study D-branes is from a microscopic perspective, using conformal field theory techniques. For example, we investigate the question of how D-branes can be introduced into orbifolded theories. Another way to study D-branes is from a space-time perspective. An example is provided by unstable D-branes, where we compute an effective action describing the decay of a bosonic D-brane. </p><p>The holographic principle is a proposed duality which suggests that a theory
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Larré, Pierre-Élie. "Fluctuations quantiques et effets non-linéaires dans les condensats de Bose-Einstein : des ondes de choc dispersives au rayonnement de Hawking acoustique." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00875349.

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Cette thèse est dédiée à l'étude de l'analogue du rayonnement de Hawking dans les condensats de Bose-Einstein. Le premier chapitre présente de nouvelles configurations d'intérêt expérimental permettant de réaliser l'équivalent acoustique d'un trou noir gravitationnel dans l'écoulement d'un condensat atomique unidimensionnel. Nous donnons dans chaque cas une description analytique du profil de l'écoulement, des fluctuations quantiques associées et du spectre du rayonnement de Hawking. L'analyse des corrélations à deux corps de la densité dans l'espace des positions et des impulsions met en évid
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Book chapters on the topic "Black hole condensation"

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Strominger, Andrew. "Black Hole Condensation and Duality in String Theory." In String Gravity and Physics at the Planck Energy Scale. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0237-4_9.

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Heckler, Andrew F. "Formation of a Photosphere Around Microscopic Black Holes." In Neutrino Mass, Dark Matter, Gravitational Waves, Monopole Condensation, and Light Cone Quantization. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4899-1564-1_24.

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"2. CONDENSATION OF DARK MATTER." In The Black Hole at the Center of Our Galaxy. Princeton University Press, 2003. http://dx.doi.org/10.1515/9780691186368-003.

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Manton, Nicholas, and Nicholas Mee. "Thermodynamics." In The Physical World. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198795933.003.0011.

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This chapter is about thermodynamics, or statistical mechanics, which explains macroscopic features of the world in terms of the motion of vast numbers of particles on the atomic scale. It discusses how macroscopic variables such as temperature and entropy were originally introduced, before presenting modern definitions of temperatures and entropy and the Laws of Thermodynamics. Alternative thermodynamic variables, including enthalpy and the Gibbs free energy, are defined and the Gibbs distribution is explained. The Maxwell distribution is derived. The chemical potential is introduced and the
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Sethna, James P. "Quantum statistical mechanics." In Statistical Mechanics: Entropy, Order Parameters, and Complexity. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198865247.003.0007.

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Quantum statistical mechanics governs metals, semiconductors, and neutron stars. Statistical mechanics spawned Planck’s invention of the quantum, and explains Bose condensation, superfluids, and superconductors. This chapter briefly describes these systems using mixed states, or more formally density matrices, and introducing the properties of bosons and fermions. We discuss in unusual detail how useful descriptions of metals and superfluids can be derived by ignoring the seemingly important interactions between their constituent electrons and atoms. Exercises explore how gregarious bosons lea
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Conference papers on the topic "Black hole condensation"

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Hanada, Masanori. "Deconfinement transition as a black hole formation by the condensation of QCD string." In The 32nd International Symposium on Lattice Field Theory. Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.214.0181.

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Hewitt, M. "String condensation: Nemesis of Black Holes?" In 18th International Conference From the Planck Scale to the Electroweak Scale. Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.258.0057.

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FUKUYAMA, TAKESHI, and MASAHIRO MORIKAWA. "COSMIC BOSE EINSTEIN CONDENSATION – INDUCED INFLATION AND EARLY FORMATION OF BLACK HOLES." In Proceedings of the VII Asia-Pacific International Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772923_0012.

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Chai, Lei, Nan Hua, Rong Ji Xu, et al. "Measurements for Condensation of Steam-Ethanol Mixtures in Microchannels." In ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icnmm2018-7724.

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The paper reports heat-transfer measurements for condensation of pure steam and steam-ethanol mixtures in parallel horizontal microchannels in an aluminum test section cooled from above and below by water in counter-current flow. The local heat flux and channel surface temperature were determined from temperatures measured by 100 thermocouples accurately located in small holes above and below the microchannels and spaced at 10 locations in the flow direction. Tests were conducted for a range of vapor mass fluxes and cooling intensities. The streamwise distributions of channel heat flux, channe
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