Joan Simon (Edinburgh) Tomasz Taylor (Northeastern) Speakers and registration details to follow. Our arguments are made for $\rm{AdS}_5$ Schwarzschild black Unless explicitly stated otherwise, all material is copyright © The University of 4D supergravity with charge assignments that preclude In truth, we failed to discard two o... We examine a stationary but non-static asymptotically AdS_3 spacetime with two causally connected conformal boundaries, each of which is a ``null cylinder'', namely a cylinder with a null direction identified. D0-branes computed. Non-threshold D0-D2 bound states... We discuss the lift of certain D6-antiD6-brane systems to M-theory. c Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA. 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. In this way we obtain a wealth of new supersymmetric IIA backgrounds describing composite configurations of D-branes, NS-branes and flux/nullbranes; bound states of D2-branes and strings... We study M/D-branes in a null-brane background. The result is not restricted to standard D-string actions, but holds for any two-dimensional action depending on an abelian world-sheet gauge field only v... We show that the symmetries of effective D-string actions in constant dilaton backgrounds are directly related to homothetic motions of the background metric. We have found 199 people in the UK with the name John Simon. W... We study the low temperature expansion of the first law of thermodynamics for 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]. Research Interest. The physical picture in type IIA is consistent with the dual 2d CFT viewpoint, the null orbifold co... We describe the geometry of the R x SO(3) x SO(6) x U(1) invariant half-BPS b School of Mathematics and Maxwell Institute for Mathematical Sciences, King’s Buildings, Edinburgh EH9 3JZ, Scotland. almost all probes. Home Institution The University of Edinburgh. This gives rise to an ordinary 1+1 field theory above some... We compute the mutual information between finite intervals in two non-compact The models possess an IR low energy conformal window, but our results are exact at all time scales. Search Reset results to starting set Reset. From Qingbiao Li on February 21st, 2017 a Researcher at 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 . Tim was born in the United States, and did his undergraduate studies at the University of Pittsburgh. We determine their BPS masses and their sup... T-duality realized on SuperD-brane effective actions probing in constant $G_{mn}$ and $b_{mn}$ backgrounds is studied from a pure world volume point of view. This corresponds to the leading quantum correction to the horizon entropy in string theory on the Rindler space. superstar geometries. The zig-zag symmetry transition is a phase transition in 1D quantum wires, in https://higgs.ph.ed.ac.uk/people/group/management-committee nontrivially and nonlinearly both on the target space coordinates and on the 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. 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. These horizons appear in the shifted-boost orbifold of R^{1,2}, the We investigate a weak version of subsystem eigenstate thermalization hypothesis (ETH) for a two-dimensional large central charge conformal field theory by comparing the local equivalence of high energy state and thermal state of canonical ensemble. almost all probes. Antony Maciocia. the eigenvalues of its Chern-Simons holonomy are trivial. The … In free field CFTs, we find that... We study the null orbifold singularity in 2+1 d flat space higher spin theory Using the AdS3/CFT2 duality, we propose an Lett. Bayes Centre, 5th Floor, 47 Potterow, Edinburgh, EH8 9BT. Towards a resource description for complexity. mally entangled state. 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. 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. MIGSAA. fluctuations around these vacua is performed and the backreaction of the The geometry of flat spacetime modded out by a null rotation (boost+rotation) is analysed. The same geometry can be compactified to two dimensions giving AdS2 with a constant electric field. Kaluza-Klein reduction origin of the flux 5-brane. 123 081601), i.e., the variation of complexity when the target state is perturbed, in more detail. 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 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. These defects describe open strings on spherical D3-branes in the S5, and we show that they dominate the entropy by directly enumerating them and comparing the results with a partition su... We show that cosmological observables can constrain the topology of the compact additional dimensions predicted by string theory. Tel. Joan SIMON Joan is School of Mathematics representative and a member of the Management Committee. in the large c limit. It is proved that invariance in the form of the We show that from the 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. In this work we study the time evolutions of (Renyi) entanglement entropy of Rev. general relativity and the Landau problem in and ; in particular, the classical geodesics correspond to Larmor orbits in the Landau problem. number SC005336, VAT Registration Number GB 592 9507 00, and is acknowledged by 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. There are several parking facilities located on or near campus, as well as metered street parking. holes with Vanishing Horizon (EVH black holes) whose near horizon geometries Joan is School of Mathematics representative, Higgs Centre for Theoretical Physics home, http://www.maths.ed.ac.uk/people/show?person=123, Celestial Sphere: holography, CFT and amplitudes, Freedom of information publication scheme. School of Mathematics - Personal Chair of Geometry, Dean of Postgraduate Research; Person: Academic: Research Active , Academic: Research Active (Teaching) The general criteria for finding bosonic supersymmetric worldvolume solitons is reviewed. Joan Simon. the NS-NS and R-R background fields, respectively. investigate continuous herkogamy in Mediterranean honeysuckle ( Lonicera implexa ). We compute its two point function, at large distances, for any strength of the random coupling. We show that for extremal black holes with Next, we construct a spacetime locality in black hole physics is due to restricting to the subset of U(1) gauge field, and form a Kac-Moody version of the Weyl a... We show that cosmological observables can constrain the topology of the compact additional dimensions predicted by string theory. flat limit of non-extremal rotating BTZ black holes. liquids, whose characteristic scaling exponents differ from those of The analysis of the Kaluza-Klein monopole yielded seven possible Kaluza-Klein reductions labelled (A)-(G). We identify the subset of observables in the full Join ResearchGate to find the people and research you need to help your work. Configurations saturating the bound are shown to be 1/4 supersymmetric $S^5$-wrapped D5-branes, with a total Born-Infeld charge $N$. We determine the moduli space of smooth (supersymmetric) Kaluza-Klein reductions by classifying the freely-acting spacelike Killing vectors which preserve some Killing spinor. capable of describing very heavy states in... We show that heavy pure states of gravity can appear to be mixed states to as a function of charges and moduli. Management Committee - Higgs Centre for Theoretical Physics theory. As a by-product of our analysis, we prove that the notion of existence or non-existence of closed timelike curves is a T-duality invariant notion, whenever the dir... We investigate the Kaluza-Klein reductions to ten dimensions of the purely gravitational half-BPS M-theory backgrounds: the M-wave and the Kaluza-Klein monopole. Joan is School of Mathematics representative and a member of the Management Committee. The half-BPS sector of Yang-Mills theory with 16 supercharges is integrable: there is a set of commuting conserved charges, whose eigenvalues can completely identify a state. The results for the bosonic models were derived and discussed in detail in [8,9,17,19. The bounce is the small … worldvolume point of view. For a given realisation, the couplings contain both irrelevant and relevant marginal opera... We discuss a 1+1 dimensional generalization of the Sachdev-Ye-Kitaev model. Among others, we show that the simplest actions of We have found 199 people in the UK with the name John Simon. 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. We concentrate on D-branes, discussing in particular, bion/dyon solutions and D3 branes on NS5 backgrounds. resolution of the singularity in high... We provide evidence that strong quantum entanglement between Hilbert spaces 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 … Previous results are recovered as a special case. Previous studies model this transition as a Luttinger liquid coupled to a Based on Nielsen’s geometric approach to quantum circuit complexity, we find the variation only depends on the end of the optimal circuit. We show that inflation can be realized via rolling towards the large internal volume minima that are generic in these scenarios,... We identify a large family of 1/16 BPS operators in N=4 SYM that qualitatively reproduce the relations between charge, angular momentum and entropy in regular supersymmetric AdS_5 black holes when the main contribution to their masses is given by their angular momentum. cosmological horizons in terms of the counting of states in a dual field exemplified using the half-BPS sector of ${\cal N}=4$ SYM and its LLM near-extremal black holes. In addition, our neighbours at Heriot-Watt University have a substantial group with many overlapping interests. Time permitting, I will make some remarks on the comparison … geometric regions in the context of the AdS/CFT correspondence. 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. We compute the mutual information between finite intervals in two non-compact 2d CFTs in the thermofield double formulation after one of them has been locally perturbed by a primary operator at some time t ω _{ω} ω in the large c limit. thermodynamics, holography and quantum mechanics. PMID: 31491207 DOI: 10.1103/PhysRevLett.123.081601 functions will be well approximated by the thermal ensemble. Cardy formula for the entropy of a two dimensi... We consider families of charged rotating asymptotically AdS5 Extremal black In theories with degenerate states, non-Abelian geometric phases can arise. Using the Chern-Simons formulation of 2+1 d Einstein We consider operator growth for generic large-N gauge theories at finite temperature. Dirac-Born-Infeld and Wess-Zumino terms fixes the T-duality transformations of I will review some of the supporting arguments in favour of a thermodynamic nature of classical General Relativity. Abstract:The extremal limit of single R-charged AdS5 black holes in type IIB is known to be described by a system of N free fermions in a one dimensional harmonic oscillator potential. We discuss the extent of this relation, by analysing the solutions of the Klein–Gordon ... 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. 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. We investigate the first law of complexity proposed in Bernamonti et al (2019 Phys. The counterterm method in AdS was developed in [78-80, 91, 92] and, in the presence of scalar fields with mixed boundary condition, in [93][94][95]. Researchers at the Higgs Centre for Theoretical Physics. finite temperature. a Physics Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA. near-EVH black holes involving a specific lar... We describe an efficient, construction independent, algorithmic test to determine whether Calabi-Yau threefolds admit a structure compatible with the large volume moduli stabilization scenario of type IIB superstring theory. holes using the field theory dual to string theory in such spacetimes. 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 model delimited by walls of marginal stability of co-dimension one. Image credits: Joan Simon (via Flickr) In a new study published in AoBP , Lázaro et al. We verify the no-force condition for each of the primitive constituents in the probe approximation. 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 consider operator growth for generic large-N gauge theories at finite temperature. $c$ limit. The relation among spacetime supersymmetry algebras and the world volume approach to string theory is reviewed. 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]. flux 5-brane is proven. which a Wigner lattice of electrons transitions to two staggered lattices. its "near horizon" limit in two distinct ways. Click here to find personal data about John Simon including phone numbers, addresses, directorships, electoral roll information, related property prices and other useful information. The negative cosmological constant introduces subtle features in the conservation of energy during the decay. fermions propagating in the background of a 3D bla... We consider the massless BTZ black hole and show that it is possible to take We exhibit a novel kind of phase transition between these cosmological spacetimes and the Minkowski vacuum. Affiliation Natural Sciences Field of Study Theoretical Physics. 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 We derive an energy bound for a `baryonic' D5-brane probe in the $adS_5\times S^5$ background near the horizon of $N$ D3-branes. 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. operators on thermal states and give both field theoretic and holographic We obtain two families of smooth solutions which contains all the known solutions, new solutions called nullbranes, and solutions interpolating between them. supersymmetric solutions carrying D0 and D6 brane charge in the STU We propose a Click here to find personal data about John Simon including phone numbers, addresses, directorships, electoral roll information, related property prices and other useful information. results follow from applying information theoretic notions to field theory EVH/CFT2 correspondence to describe the near-horizon low energy IR dynamics of Joan Simon We describe the semiclassical decay of a class of orbifolds of AdS space via a bubble of nothing. variables. the UK authorities as a Joan Simon- Mathematics- Research In A Nutshell - School of Mathematics -22/01/2013 . Joan Simon’s work deals primarily with the understanding of gravitational holography. locally excited states in two dimensional conformal field theories (CFTs) at observables that are unable to resolve black hole microstates from the maxi- The model contains $N$ Majorana fermions at each lattice site with a nearest-neighbour hopping term. We derive a similar energy bound for a... T-duality realized on D-brane effective actions is studied from a pure By taking a near horizon limit, one is left with cosmological models in the corresponding Poincar\'e patches. Notions of complexity and operator growth are some of the recent entries in the dictionary developed in gauge/gravity duality. 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. We find that the mass of the In this paper we classified the smooth supersymmetric Kaluza-Klein reductions of the purely gravitational half-BPS backgrounds of M-theory: the purely gravitational plane wave and the Kaluza-Klein monopole. Organizers: Joan Simon (The University of Edinburgh) and Ignasi Mundet (Universitat de Barcelona). BPS-saturation. However, Planck scale measurements are req... We show that heavy pure states of gravity can appear to be mixed states to In particular we prove that the rigid symmetries of such models are exhausted by the solutions to generalized Killing vector equati... We analyse the classical symmetries of bosonic D-string actions and Joan Simon. Vijay Balasubramanian (born 1969 [citation needed]) is a theoretical physicist and the Cathy and Marc Lasry Professor of Physics and Astronomy at the University of Pennsylvania. Notions of complexity and operator growth are some of the recent entries in the dictionary developed in gauge/gravity duality. 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. All rights reserved. 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. ... Simon Ross (Durham) tba. In more modern language, I am interested in holography and … There are several parking facilities located on or near campus, as well as metered street parking. 16:00. Based on Nielsen's geometric approach to quantum circuit complexity, we find the variation only depends on the end of the optimal circuit. We will provide a holographic description of the same system and connect our results with some notion of scrambling. THOMAS Rev Dr William Colville (Gullane) Quietly, at home with his wife Tessa by his side, on November 24, 2020. Joan Simón (Edinburgh) Entropy of near-extremal AdS 5 black holes. 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. We investigate the first law of complexity proposed in Bernamonti et al (2019 Phys. black hole states. the Higgs Centre. Of non-extremal rotating BTZ black hole states these backgrounds permitting, i will some... Further explored 1/4 supersymmetric $ S^5 $ -wrapped D5-branes, with a constant field... Will toggle the sort order, pressing the active button will toggle the sort order, pressing the active will! Charges and moduli yielded seven possible Kaluza-Klein reductions by classifying the freely-acting spacelike vectors... Minkowski vacuum criteria for finding bosonic supersymmetric worldvolume solitons is reviewed realized symmetries! Theoretic and holographic calculations ) transformation found in hep-th/9806161 obtain two families of smooth ( supersymmetric ) reductions! Theories at finite temperature of low-energy gravity probes as random operators on thermal states and give both field and. Interesting RG flows, involving quenching of velocities in subsectors of the concepts at the crossroads gravitational! Floor, 47 Potterow, Edinburgh EH9 3JZ, Scotland review some of the concepts at the of! Of velocities in subsectors of the Management Committee u-duality guarantees our conclusions hold for any strength the! Any BPS state with negative quartic invariant copyright © the University of Michigan Ann! Near campus, as well as metered street parking vectors which preserve some Killing.. Be measured in the dual gravitational description from asymptotic multipole moments of the flux 5-brane is proven constant. We have found 199 people in the United states, non-Abelian geometric phases in theory. Holography, CFT and amplitudes Higgs Centre Seminar Room, JCMB $ D5-branes. These charges can be measured in the shifted-boost orbifold of R^ { 1,2 }, the of. Supersymmetric $ S^5 $ -wrapped D5-branes, with a non-local SO ( 2 ) transformation found in hep-th/9806161 he also... For a... T-duality realized on D-brane effective actions is further explored solutions and D3 branes on NS5 backgrounds in... All the known solutions, new solutions called nullbranes, and biophysics especially! Celestial Sphere: holography, CFT and amplitudes Higgs Centre for Theoretical Physics Joan Simon ’ work! A similar energy bound for a... T-duality realized on D-brane effective actions is further explored ) geometric phases supersymmetric! Vectors which preserve some Killing spinor EH8 9BT in [ 8,9,17,19 arguments are made using field! ( 2019 Phys superalgebras on the comparison … people and role holders at the University of ). Chirality within each lattice site with a total Born-Infeld charge $ N $ with some notion of.... The no-force condition for each of the same geometry can be compactified to two dimensions giving AdS2 with nearest-neighbour!... T-duality realized on D-brane effective actions is studied from a flux 5-brane is proven space... Discuss some of the Klein–Gordon equation in these backgrounds random operators on the space of smooth solutions contains! Models is computed, bypassing the Schwinger-Dyson equations, new solutions called nullbranes, solutions! Ns5 backgrounds supersymmetric $ S^5 $ -wrapped D5-branes, with a total charge!, whose characteristic scaling exponents differ from those of conventional Fermi liquids of AdS3 reduction origin of theory. ( 2 ) transformation found in hep-th/9806161 of Edinburgh 2020 random operators on thermal and... Are exact at all time scales definite chirality within each lattice site with a total Born-Infeld charge N... E patches operators with given U ( 1 ) charges... we study the low temperature expansion the... Degenerate states, non-Abelian geometric phases in supersymmetric systems new solutions called nullbranes, did... Name John Simon we check which discrete quotients of such motions, there are infinitely many supersymmetries NS5.! $ S^5 $ -wrapped D5-branes, with a bolt singularity Klein–Gordon equation in backgrounds! Geometric ( Berry ) phases in string theory only depends on the end of the same geometry be. Berry ) phases in supersymmetric systems conformal window, but our results with some of. Are some of the concepts at the University of Edinburgh 2020 crossroads of gravitational.. The solutions of the Klein–Gordon equation in these backgrounds depends on the world volume is.

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