Results 61 to 70 of about 95,179 (254)

Black Holes in String Theory

Interdisciplinary Journal of Research and Development, 2017
A black hole is a region of space time exhibiting such strong gravitational effects that nothing not even particles and electromagnetic radiation such as light can escape from inside it. From the theoretical point of view, black holes provide an intriguing arena in which to explore the challenges posed by the reconciliation of general relativity and ...
Ndriçim Sadikaj, Anila Duka
openaire   +1 more source

Hidden Charge‐Order in the Mixed‐Valent K0.75Li2Cr6O12 High‐Pressure Oxide

Advanced Science, EarlyView.
K0.75Li2Cr6O12 is one of the few mixed valent chromium oxides. It shows a single angle spiral magnetic structure with a k = [1/3 1/3 ¼] propagation vector. Density functional theory reveals a hidden charge order that is necessary to stabilize the antiferromagnetic (AFM) ground state.
Angel M. Arévalo‐López, Clemens Ritter, Marielle Huvé, Olivier Mentré   +3 more
wiley   +1 more source

Evaporation of Microscopic Black Holes in String Theory and the Bound on Species [PDF]

, 2009
We address the question how string compactifications with D-branes are consistent with the black hole bound, which arises in any theory with number of particle species to which the black holes can evaporate.
't Hooft, Allen, Anchordoqui, Anchordoqui, Antoniadis, Antoniadis, Arkani-Hamed, Balasubramanian, Bekenstein, Blumenhagen, Bowick, Brustein, Carter, Coleman, Conlon, Dimopoulos, Douglas, Dvali, Dvali, Dvali, Dvali, Dvali, Dvali, Dvali, Dvali, Hartle, Israel, Krauss, Lüst, Lüst, Preskill, Teitelboim   +31 more
core   +2 more sources

Enhanced Bandgap Flexibility in Perovskite‐Silicon Tandem Solar Cells via Three‐Terminal Architecture

Advanced Science, EarlyView.
Three‐terminal (3T) perovskite/silicon tandem solar cells overcome the current‐matching constraints of 2T designs. Using an IBC POLO silicon bottom cell, we demonstrate a 30.1% PCE, with performance largely decoupled from perovskite bandgap and enhanced resilience under realistic, time‐dependent solar spectra.
Mohammad Gholipoor, Michael Rienaecker, Xuzheng Liu, Seyedamir Orooji, Lingyi Fang, Paul Fassl, Renjun Guo, Uli Lemmer, Robby Peibst, Ulrich Wilhelm Paetzold   +9 more
wiley   +1 more source

Topological classes of thermodynamics of the static multi-charge AdS black holes in gauged supergravities: novel temperature-dependent thermodynamic topological phase transition

Journal of High Energy Physics
In this paper, we investigate, in the framework of the topological approach to black hole thermodynamics, using the generalized off-shell Helmholtz free energy, the topological numbers of the static multi-charge AdS black holes in four- and five ...
Di Wu, Shuang-Yong Gu, Xiao-Dan Zhu, Qing-Quan Jiang, Shu-Zheng Yang   +4 more
doaj   +1 more source

Black hole thermodynamics with dynamical lambda

Journal of High Energy Physics, 2017
We study evolution and thermodynamics of a slow-roll transition between early and late time de Sitter phases, both in the homogeneous case and in the presence of a black hole, in a scalar field model with a generic potential having both a maximum and a ...
Ruth Gregory, David Kastor, Jennie Traschen   +2 more
doaj   +1 more source

Massive vector fields in Kerr-Newman and Kerr-Sen black hole spacetimes

Journal of High Energy Physics, 2020
The superradiant instability modes of ultralight massive vector bosons are studied for weakly charged rotating black holes in Einstein-Maxwell gravity (the Kerr- Newman solution) and low-energy heterotic string theory (the Kerr-Sen black hole).
Ramiro Cayuso, Oscar J.C. Dias, Finnian Gray, David Kubizňák, Aoibheann Margalit, Jorge E. Santos, Renato Gomes Souza, Leander Thiele   +7 more
doaj   +1 more source

String scale black holes at large D

Journal of High Energy Physics, 2022
We study aspects of black holes near the Hagedorn temperature. The large dimension expansion introduced by Soda, Emparan, Grumiller and Tanabe connects them to the well studied two dimensional black hole based on SL(2) k /U(1).
Yiming Chen, Juan Maldacena
doaj   +1 more source

Critical phenomena in the AdS/CFT duality

, 2010
We review black holes with second-order phase transition in string theory (R-charged black holes and holographic superconductors) and review their static and dynamic critical phenomena.
Albash, Albash, Aprile, Behrndt, Buchel, Buchel, Cai, Cvetic, Cvetic, Franco, Gubser, Gubser, Hartnoll, Hartnoll, Herzog, Herzog, Hohenberg, Horowitz, Iqbal, Jain, Kraus, Maeda, Maeda, Maeda, Maeda, Maeda, Makoto Natsuume, Maldacena, Montull, Natsuume, Natsuume, Witten, Witten   +32 more
core   +1 more source

State-space Manifold and Rotating Black Holes [PDF]

, 2010
We study a class of fluctuating higher dimensional black hole configurations obtained in string theory/ $M$-theory compactifications. We explore the intrinsic Riemannian geometric nature of Gaussian fluctuations arising from the Hessian of the coarse ...
A Belhaj, A Dabholkar, A Dabholkar, A Dhar, A Dhar, A Mikhailov, A Sen, A Sen, A Strominger, A Strominger, BC Palmer, Bhupendra Nath Tiwari, CAR Herdeiro, CG Callan, D Bak, D Bak, D Berenstein, D Gaiotto, D Mateos, D Mateos, D Rasheed, D Tranah, DC Robinson, F Larsen, F Weinhold, F Weinhold, G Arcioni, G Lopes Cardoso, G Mandal, G Mandal, G Ruppeiner, G Ruppeiner, G Ruppeiner, G Ruppeiner, G Ruppeiner, G Ruppeiner, GT Horowitz, GT Horowitz, GW Gibbons, H Elvang, H Elvang, H Elvang, H Elvang, H Elvang, H Lin, HJ Sheinblatt, HK Kunduri, I Bena, I Bena, I Bena, I Bena, J Kinney, J Scherk, J Scherk, J-H Cho, J-y Shen, JB Gutowski, JB Gutowski, JB Gutowski, JC Breckenridge, JC Breckenridge, JD Bekenstein, JE Aman, JE Aman, JE Aman, JE Aman, JM Maldacena, JM Maldacena, JM Maldacena, JM Maldacena, JP Gauntlett, K Behrndt, L Grant, LD Landau, M Awada, M Berkooz, M Cvetič, M Cyrier, MM Sheikh-Jabbari, N Itzhaki, NV Suryanarayana, O Aharony, O Lunin, O Lunin, PJ Silva, PO Mazur, R Argurio, R Emparan, R Emparan, R Gopakumar, RC Myers, RC Myers, RK Gupta, RR Khuri, S Bellucci, S Bellucci, S Bellucci, S Bellucci, S Bellucci, S Bellucci, S Bellucci, S Bellucci, S Ferrara, S Kim, SD Mathur, SD Mathur, Stefano Bellucci, SW Hawking, T Sarkar, T Sarkar, UH Danielsson, V Balasubramanian, V Balasubramanian, VA Kostelecky, W Taylor, ZW Chong, ZW Chong   +116 more
core   +1 more source