I will describe the emergence of geometric (Berry) phases in supersymmetric systems. Antony Maciocia. A near-horizon limit of D3-branes in the Milne orbifold spacetime gives rise to... We develop a formalism to characterize the redshift evolution of the dark energy potential. locally excited states in two dimensional conformal field theories (CFTs) at The purpose of the present paper is twofold. 16:00. Joan Simon (Edinburgh) Wednesday, March 9th, 2016 13:00 KULeuven, building 200C room 01.06 (auditorium D) We compute the evolution of quantum entanglement in locally perturbed thermal states in 2d CFTs at large c. Our analysis is performed in terms of Fourier modes, which do not mix with other operators as time evolves, and whose correlation functions are determined by their two-point functions alone, at leading order in the large-N limit. ... Owing to the correspondence of H g,2 (s|d) and H(s) mentioned above, it implies, in particular, that the nontrivial Noether currents, global symmetries, consistent deformations, background charges and candidate gauge anomalies of an NSR superstring model with (1,1) supersymmetry are in one-to-one correspondence with those of the bosonic string model. I discuss some of the concepts at the crossroads of gravitational thermodynamics, holography and quantum mechanics. In particular, we determine the ground state energy In the first part, we provide an algebraic characterization of several families of $\nu= \frac{1}{2^n}$ $n\leq 5$ BPS states in M theory, at threshold and non-threshold, by an analysis of the BPS bound derived from the ${\cal N}=1$ D=11 SuperPoincar\'e algebra. In order to understand when geometric descriptions are possible, we exploit the AdS/CFT correspondence in the half-BPS sector of asymptotically AdS;{5} × S5 universes. He has also … Joan Simon (University of Edinburgh) Horizons, bits and holography. $c$ limit. We investigate the first law of complexity proposed in Bernamonti et al (2019 Phys. Joan Simon (Edinburgh University) Exploring EPR=ER in LLM . near-extremal black holes. This workshop will be co-organized with Dr. Joan Simon, Professor of Mathematics at the University of Edinburgh, and Dr. Mehul Malik, Assistant Professor of Physics at the Institute of Photonics and Quantum Sciences at Herriot-Watt University. The relation among spacetime supersymmetry algebras and the world volume approach to string theory is reviewed. using the field theory dual to string theory in such spacetimes. self-dual orbifold of AdS3 and the second to a spacelike singular AdS3/Z_K description of low-energy gravity probes as random operators on the space of In theories with degenerate states, non-Abelian geometric phases can arise. We propose a two dimensional CFT. We obtain two families of smooth solutions which contains all the known solutions, new solutions called nullbranes, and solutions interpolating between them. As a consequ... We classify and construct all the smooth Kaluza-Klein reductions to ten dimensions of the M2- and M5-brane configurations which preserve some of the supersymmetry. We discuss both regular configurations, such as AdS_4 x S^7 and basic constituents througho... A four-dimensional universe, arising from a flux compactification of Type IIB string theory, contains scalar fields with a potential determined by topological and geometric parameters of the internal -hidden- dimensions. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336, VAT Registration Number GB 592 9507 00, and is acknowledged by the UK authorities as a “Recognised body” which has been granted degree awarding … We use the AdS/CFT correspondence to discuss an Ollie Burke,1,2,* Jonathan Gair,1,2 and Joan Simón 2 1Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, Potsdam-Golm 14476, Germany 2School of Mathematics, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh … In t... We analyze the structure of heavy multitrace BPS operators in N = 1 superconformal quiver gauge theories that arise on the worldvolume of D3-branes on an affine toric cone. c Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. W... We study the low temperature expansion of the first law of thermodynamics for Joan Simon (Edinburgh Univeristy) Jorge Zanelli ( CECS, Valdivia ) NOTE: The Worshop will be preceded by the Spring School on Superstring Theory and Related Topics (smr2842) , 10 - 18 March 2016 . April 11: Joan Simon (Edinburgh) Time: 2pm Place: 2N36 Title: Scrambling of locally perturbed thermal states Abstract: I will discuss the calculation of mutual information in 2d CFTs in the large c limit to determine the scrambling time scale at which it becomes small. The holographic relation between quantum correlations and connectivity of spacetime is explored for single R-charged AdS5 black holes and their half-BPS limits (superstars). We compute its two point function, at large distances, for any strength of the random coupling. Joan Simon (Edinburgh) Tomasz Taylor (Northeastern) Speakers and registration details to follow. Researchers at the Higgs Centre for Theoretical Physics. ... Simon Ross (Durham) tba. Lett. And what does it have to do with extremal black holes? After studying the classical moduli space of these configurations, we explicitly construct a set of gauge invariant operators involving 't Hooft monop... We find the complete classical moduli space of two-centered among linear realizations and non-local ones. First, the origin of gravitational thermodynamics due to coarse graining of quantum information is exemplified using the half-BPS sector of \(\mathcal{N}\,=\,4\) SYM and its LLM description in type IIB supergravity. The bounce is the small … equation in these backgrounds. Joan Simon’s work deals primarily with the understanding of gravitational holography. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336, VAT Registration Number GB 592 9507 00, and is acknowledged by the UK authorities as a “Recognised body” which has been granted degree awarding powers. Holographic partition functions and phases for higher genus Riemann surfaces Home Institution The University of Edinburgh. operators on thermal states and give both field theoretic and holographic We study stable circular orbits in spherically symmetric AdS black holes in various dimensions and their limiting innermost stable circular orbits (ISCOs). Our arguments are made for $\rm{AdS}_5$ Schwarzschild black calculations. operators capable of describing very heavy sta... We prove the existence of one quarter supersymmetric type IIB configurations that arise as non-trivial scaling solutions of the standard five dimensional Kerr-AdS black holes by the explicit construction of its Killing spinors. However, Planck scale measurements are req... We show that heavy pure states of gravity can appear to be mixed states to Most quantum states have wavefunctions that are widely spread over the accessible Hilbert space and hence do not have a good description in terms of a single classical geometry. I review some of the concepts at the crossroads of gravitational Joan Simon School of Mathematic, University of Edinburgh J.Simon ed.ac.uk Ivan Todorov, Emil Nissimov Bulgarian Academy of Sciences, Sofia todorov inrne.bas.bg - nissimov inrne.bas.bg Elias Kiritsis CPHT, Ecole Polytechnique kiritsis alicemail.frg Bernard de Wit Inst. Parking. Julian Sonner (DAMTP, Cambridge) Geometric phases in string theory. Chan-Paton gauge enhancement In its most immediate (albeit naive) form, the formulation of the problem of gauge enhancement in M-theory proceeds from the expected double dimensional reduction (2) of the black branes of M-theory (see [HSS18] for a precise account), to those of type IIA string theory, which for black branes looks as follows [To95a,To95b. Rev. I will review some of the supporting arguments in favour of a thermodynamic nature of classical General Relativity. the mutual information vanishes and the origi... We study the null orbifold singularity in 2+1 d flat space higher spin theory as well as string theory. EVH/CFT2 correspondence to describe the near-horizon low energy IR dynamics of THE UNIVERSITY of EDINBURGH DEGREE REGULATIONS & PROGRAMMES OF STUDY 2020/2021 Information in the Degree Programme Tables may still be subject to change in response to Covid-19 We have found 199 people in the UK with the name John Simon. Beloved husband and father of Robert, Rosaly, Fiona, Joan, Catriona and Simon, non-zero charges under the asymptotic symmetry... We study the possible dynamical emergence of IR conformal invariance describing the low energy excitations of near-extremal R-charged global AdS5 black holes. uncover the mapping of global symmetries of th... We show that each rigid symmetry of a D-string action is contained in a family of infinitely many symmetries. Lett. Joan Simon- Mathematics- Research In A Nutshell - School of Mathematics -22/01/2013 . results follow from applying information theoretic notions to field theory He obtained his PhD from the University of Oxford (2013), and subsequently held junior research fellowships at the University of Cambridge (2013-16) and Imperial College London (2016-19) before moving to Edinburgh with a Royal Society University Research Fellowship in 2019. Joan Simón (Edinburgh) Entropy of near-extremal AdS 5 black holes. holes using the field theory dual to string theory in such spacetimes. Interested in black holes, resolution of singularities and thermodynamics of horizon (null) hypersurfaces. The existence of supersymmetric D0-branes at an arbitrary distance from a The holographic relation between quantum correlations and connectivity of spacetime is explored for single R-charged AdS$_5$ black holes and their half-BPS limits (superstars). Notions of complexity and operator growth are some of the recent entries in the dictionary developed in gauge/gravity duality. The analysis is extended to ... Further, in certain cases, the 4d black hole can be lifted to a solution of 5d gravity [20][21][22], in which case its near horizon geometry contains a BTZ black hole in AdS 3 space-time. The model contains $N$ Majorana fermions at each lattice site with a nearest-neighbour hopping term. 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