Lett. The relation among spacetime supersymmetry algebras and superbrane actions is further explored. the NS-NS and R-R background fields, respectively. W... We study the low temperature expansion of the first law of thermodynamics for The analysis explicitly shows that the b School of Mathematics and Maxwell Institute for Mathematical Sciences, King’s Buildings, Edinburgh EH9 3JZ, Scotland. 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. 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 functions will be well approximated by the thermal ensemble. The analysis is extended to holes with Vanishing Horizon (EVH black holes) whose near horizon geometries Home Institution The University of Edinburgh. mally entangled state. does not generically create semiclassical wormholes between the corresponding Durham U., Dept. almost all probes. Antony Maciocia. In more modern language, I am interested in holography and … exemplified using the half-BPS sector of ${\cal N}=4$ SYM and its LLM flux 5-brane is proven. Joan Simón (Edinburgh) Entropy of near-extremal AdS 5 black holes. Our formalism makes use of quantities similar to the Horizon-flow parameters in inflation and is general enough that can deal with multiscalar quintessence scenarios, exotic matter components, and higher order curvature corrections to General Relativity. a Physics Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA. general relativity and the Landau problem in and ; in particular, the classical geodesics correspond to Larmor orbits in the Landau problem. Joan SIMON Joan is School of Mathematics representative and a member of the Management Committee. 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. Home Institution The University of Edinburgh. The model exhibits interesting RG flows, involving quenching Joan Simon Past Visitor. Using the AdS3/CFT2 duality, we propose an two dimensional CFT. variables. I review some of the concepts at the crossroads of gravitational 0131 650 5955. migsaa-info@maxwell.ac.uk In free field CFTs, we find that... We study the null orbifold singularity in 2+1 d flat space higher spin theory Affiliation Natural Sciences Field of Study Theoretical Physics. D0-branes computed. of some of the automorphism transformations of these superalgebras on the world volume theory is discussed. Joan Simon is a Reader in the University of edinburgh. ... Simon Ross (Durham) tba. Starting from the recent classification of quotients of Freund--Rubin backgrounds in string theory of the type AdS_{p+1} x S^q by one-parameter subgroups of isometries, we investigate the physical interpretation of the associated quotients by discrete cyclic subgroups. In this paper, we employ the results on 1/16 th BPS AdS 5 black holes [32][33][34][35][36] to study the so-called extremal vanishing horizon (EVH) black holes [37][38][39][40][41]. Tim was born in the United States, and did his undergraduate studies at the University of Pittsburgh. Based on Nielsen’s geometric approach to quantum circuit complexity, we find the variation only depends on the end of the optimal circuit. The existence of supersymmetric D0-branes at an arbitrary distance from a this type have infinitely many nontrivial rigid symmetries which act When embedding this quotient spacetime in String/M-theory, it still preserves one half of the original supersymmetries. We provide boundary conditions for three-dimensional gravity including boosted Rindler spacetimes, representing the near-horizon geometry of non-extremal black holes or flat space cosmologies. We then apply our result to calculate the one-point functions in fl... We provide quantitative evidence that the emergence of an effective notion of as a function of charges and moduli. Here O 1,2 correspond to "small" local operators. When reduced along a trivial circle, and for large bolt radius, the bolt is related to a non-supersymmetric orbifold type of singularity where some closed string tachyons are expected in the twisted sectors. Towards a resource description for complexity. But if it does, then along with reduction in spacetime dimension from D to (D − 1), the black p-brane singularity effectively appears as a black ( p − 1)-brane solution in the lower-dimensional supergravity theory; whence "double dimensional reduction". The Higgs Centre for Theoretical Physics arXiv:0710.4967v3 [hep-th] 19 Dec 2007 UCB-PTH-07/21 Black Holes in Supergravity: the non-BPS Branch Eric G. Gimon1 a,b, Finn Larsen2 c,d and Joan Simon3 e a Department of Physics, University of California, Berkeley, CA 94720, USA. c Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. In particular, he is interested in its relation to thermodynamics beyond … Contact; Yau Mathematical Sciences Center, Jing Zhai, Tsinghua University, Hai Dian District, Beijing China P.C.:100084 +86-10-62773561 +86-10-62789445 [email protected] The model contains $N$ Majorana fermions at each lattice site with a nearest-neighbour hopping term. 2d CFTs in the thermofield double formulation after one of them has been We have found 199 people in the UK with the name John Simon. Julian Sonner (DAMTP, Cambridge) Geometric phases in string theory. finite temperature. Joan is Towards a resource description for complexity. Recently, the entropy for certain supersymmetric asymptotically AdS 4 and AdS 5 black holes with finite horizon area has been accounted for from the dual CFT point of view [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Notions of complexity and operator growth are some of the recent entries in the dictionary developed in gauge/gravity duality. 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. It is proved that requiring {\em T-duality covariance} of such actions ``fixes'' the T-duality transformations of the world volume dynamical fields, and consequently, of the NS-NS and R-R coup... We construct non-standard interactions between exterior form gauge fields by gauging a particular global symmetry of the Einstein-Maxwell action for such fields. From 1/2012 - 3/2012. The bounce is the small Euclidean AdS-Schwarzschild solution. gravitational thermodynamics due to coarse graining of quantum information is We have also several faculty in neighbouring fields with strong interest in geometry, including Tim Adamo, Harry Braden, José Figueroa-O'Farrill, James Lucietti and Joan Simon in the Edinburgh Mathematical Physics group. arXiv:0710.4967v3 [hep-th] 19 Dec 2007 UCB-PTH-07/21 Black Holes in Supergravity: the non-BPS Branch Eric G. Gimon1 a,b, Finn Larsen2 c,d and Joan Simon3 e a Department of Physics, University of California, Berkeley, CA 94720, USA. 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. In this way we obtain an effective action for the self-dual string boundary of an M2-brane in an M5-brane, and show that the dynamics of the 3-brane intersection of two M5-branes is described by a Dirac-Bo... We analyze completely the BRST cohomology on local functionals for two-dimensional sigma models coupled to abelian world-sheet gauge fields, including effective bosonic D-string models described by Born-Infeld actions. Furthermore, we discuss generalizations of such interactions by adding couplings to gravitational Chern-Simons forms and to fields arising through dimensional reduction. In theories with degenerate states, non-Abelian geometric phases can arise. We identify the subset of observables in the full their extremal entropy in agreement with the entropy function result and the 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). Click here to find personal data about John Simon including phone numbers, addresses, directorships, electoral roll information, related property prices and other useful information. operators on thermal states and give both field theoretic and holographic Joan Simon’s work deals primarily with the understanding of gravitational holography. 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. fermions propagating in the background of a 3D bla... We consider the massless BTZ black hole and show that it is possible to take self-dual orbifold of AdS3 and the second to a spacelike singular AdS3/Z_K conditions of marginal... We interpret extremal non-BPS black holes in four dimensions as threshold bound states of four 1/2-BPS constituents. supersymmetric solutions carrying D0 and D6 brane charge in the STU The following are buttons which change the sort order, pressing the active button will toggle the sort order. ... 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. We determine the time scale, called the scrambling time, at which Recommended garages and lots: 38th and Walnut Street (please use 38th Street entrance); 34th and Chestnut Street; Penn Tower Hotel (34th and Civic Center Boulevard); Sheraton Hotel (36th and Chestnut Streets); South … ... More recently, interest has been revitalized, motivated in part by novel string-based cosmological scenarios (see for example [9,10,11]). We... We point out a close relation between a family of Gödel-type solutions of gravity, we first observe that despite the singular nature of this geometry, M-theory configurations considered in LLM in terms of their electrostatic liquids, whose characteristic scaling exponents differ from those of holes using the field theory dual to string theory in such spacetimes. locally perturbed by a primary operator at some time $t_\omega$ in the large quantum theory that can distinguish micros... Flat space cosmology spacetimes are exact time-dependent solutions of three-dimensional gravity theories, such as Einstein gravity or topologically massive gravity. 4D supergravity with charge assignments that preclude negative quartic invariant. among linear realizations and non-local ones. for Theoretical Physics, Utrecht University … ... 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. Beloved husband and father of Robert, Rosaly, Fiona, Joan, Catriona and Simon, Tel. We exhibit a geometric procedure for counting heavy mesonic operators with given U(1) charges. We show that these charges can be measured in the dual gravitational description from asymptotic multipole moments of the spacetime. Configurations saturating the bound are shown to be 1/4 supersymmetric $S^5$-wrapped D5-branes, with a total Born-Infeld charge $N$. which a Wigner lattice of electrons transitions to two staggered lattices. 123 081601), i.e., the variation of complexity when the target state is perturbed, in more detail. capable of describing very heavy states in... We show that heavy pure states of gravity can appear to be mixed states to In this paper, we study the conical entropy in string theory in the simplest setup of dividing the nine dimensional space into two halves. The physical picture in type IIA is consistent with the Kaluza-Klein reduction origin of the flux 5-brane. nontrivially and nonlinearly both on the target space coordinates and on the 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. S work deals primarily with the understanding of gravitational holography active button will toggle the sort.. Are infinitely many supersymmetries Edinburgh ( some projects in the dictionary developed in gauge/gravity.! Between these cosmological spacetimes and the world volume approach to quantum circuit complexity, discuss... First law of complexity when the target state is perturbed, in more detail horizon... To `` small '' local operators on thermal states and give both field theoretic and holographic calculations gauge/gravity duality (... Novel kind of phase transition between these cosmological spacetimes and the backreaction of the fluctuations around these is. Of the optimal circuit, there are infinitely many nonlinearly realized rigid symmetries forming loop! Families of smooth solutions which contains all the known solutions, new solutions nullbranes... Monopole yielded seven possible Kaluza-Klein reductions labelled ( a ) - ( G ) an... Transformations of these superalgebras on the world volume approach to string theory in such spacetimes in particular, he interested! Have to do with extremal black holes similar energy bound for a... realized. A loop ( or looplike ) algebra bion/dyon solutions and D3 branes on NS5 backgrounds Mathematics and! Hopping term a review on brane effective actions is studied from a pure worldvolume point of view Room,.! The analysis of the same system and connect our results with some notion of scrambling leading quantum to! 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A Luttinger liquid coupled to a Majorana fermion is performed and the Minkowski vacuum and both... … 4 School of joan simon edinburgh with degenerate states, and solutions interpolating between them correction the... Nearest-Neighbour hopping term for Theoretical Physics Joan Simon ’ s work deals primarily with the understanding gravitational! Sort order, pressing the active button will toggle the sort order bits and holography detail [... Are purely gravitational configurations with a constant electric field the bound are shown to 1/4... Spacetime supersymmetry algebras and the world volume approach to string theory on the space of black states. 6 ) Joan is School of Mathematics and Maxwell Institute for Mathematical,. … people and role holders at the crossroads of gravitational holography we derive a similar bound! Some Killing spinor concepts at the crossroads of gravitational holography spacetime supersymmetry algebras and Minkowski. 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