# All Upcoming Events

On Friday, January 30, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series:
Rick Gupta (Weizmann Institute of Sciences)
BSM Primary effects
On Friday, January 30, at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series:
Professor Chris Lintott (Department of Physics, University of Oxford)
Science with a Crowd: The Zooniverse from Galaxy Zoo to LSST
On Monday at 12:00 in Fisher Room of NAPL, a seminar in the String Theory series:
John Dixon (visiting Oxford)
BRST Cohomology, Extraordinary Invariants and the Zen Splitting of SUSY
Further information: The chiral scalar superfield has interesting BRST cohomology, but the relevant cohomology objects all  have spinor indices. So they cannot occur in an action. They need to be coupled to a chiral dotted spinor superfield. Until now, this has been very problematic, since no sensible action for a chiral dotted spinor superfield was known.  The most obvious such action contains higher derivatives and tachyons. Now,  a sensible  action has been found. When coupled to the cohomology, this action removes the supersymmetry charge from the theory while maintaining the rigidity and power of supersymmetry.The simplest example of this phenomenon has exactly the fermion content of the Leptons or the Quarks.  The mechanism has the potential to get around the cosmological constant problem, and also the problem of the sum rules of spontaneously broken supersymmetry.
On Monday at 14:15 in L5, a seminar in the Geometry and Analysis series:
Weiyi Zhang (Warwick)
Geometric structures, Gromov norm and Kodaira dimensions
Further information: Kodaira dimension provides a very successful classification scheme for complex manifolds. The notion was extended to symplectic 4-manifolds. In this talk, we will define the Kodaira dimension for 3-manifolds through Thurston’s eight geometries. This is compatible with other Kodaira dimensions in the sense of “additivity”. This idea could be extended to dimension 4. Finally, we will see how it is sitting in a potential classification of 4-manifolds by exploring its relations with various Kodaira dimensions and other invariants like Gromov norm.
On Tuesday at 12:00 in L5, a seminar in the Quantum Field Theory series:
Richard Szabo (Heriot-Watt)
Supersymmetric gauge theories on ALE spaces
On Tuesday at 14:00 in Fisher Room, DWB, a seminar in the Holography series:
Dmitry Kovrizhin (U. Cambridge)
Non-Equilibrium Quantum Matter: From Quantum Hall Edge States to Quantum Spin-Liquids
On Tuesday at 15:45 in L4, a seminar in the Algebraic and Symplectic Geometry series:
Richard Thomas (Imperial)
Homological projective duality
Further information: I will describe a little of Kuznetsov's wonderful theory of Homological projective duality, a generalisation of classical projective duality that relates derived categories of coherent sheaves on different algebraic varieties. I will explain an approach that seems simpler than the original, and some applications that occur in joint work with Addington, Calabrese and Segal.
On Wednesday at 12:00 , a seminar in the Strings Junior series:
Andreas Braun
F-theory: string dualities and geometry
Further information: Introduction: F-theory is only defined through its various dualities to string and supergravity theories. After a pedagogic introduction to the basic ideas, I will highlight the connections between (mostly algebraic) geometry and F-theory.
On Thursday at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series:
Ivo de Medeiros Varzielas (University of Southampton)
Family and CP symmetries
On Thursday at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series:
Volodya Braun (Universitaet Regensburg)
Uses of conformal symmetry in QCD
On Friday at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series:
Michelangelo Mangano (CERN)
Challenges and future scenarios for High Energy Physics
On Friday at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series:
Professor Immanuel Bloch (Max-Planck Institute for Quantum Optics)
Controlling and Exploring Quantum Matter at the Single Atom Level
On Monday, February 9, at 12:00 in L5, a seminar in the String Theory series:
Charles Strickland-Constable (CEA/Saclay)
TBA
On Monday, February 9, at 14:15 in L5, a seminar in the Geometry and Analysis series:
Automorphism and isometry groups of Higgs bundle moduli spaces
Further information: The moduli space of Higgs bundles on a hyperbolic Riemann surface is a complex analytic variety which has a hyperkahler metric on its smooth locus. As such it has several associated symmetry groups including the group of complex analytic automorphisms and the group of isometries. I will discuss the classification of these and some other related groups.
On Tuesday, February 10, at 14:00 in Fisher Room, DWB, a seminar in the Holography series:
Ben Craps (Vrije U. Brussels)
Analytic results on AdS (in)stability: conservation laws and missing secular terms
On Tuesday, February 10, at 15:45 in L4, a seminar in the Algebraic and Symplectic Geometry series:
Alessio Corti (Imperial)
Algebraic-geometric aspects of constructing G2 manifolds as connected sums
Further information: I will speak about weak Fano 3-folds, K3 surfaces and their Picard lattices, and explain how to solve the matching problem in various situations.
On Tuesday, February 10, at 15:45 in L4, a seminar in the String Theory series:
Alessio Corti ((Imperial College)
Algebraic-geometric aspects of constructing G2 manifolds as connected sums
Further information: I will speak about weak Fano 3-folds, K3 surfaces and their Picard lattices, and explain how to solve the matching problem in various situations
On Thursday, February 12, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series:
James Bonifacio (University of Oxford)
Massive Gravity (TBC)
On Thursday, February 12, at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series:
Cliff Burgess (PI Waterloo)
Open EFTs
Further information: arXiv:1408.5002
On Friday, February 13, at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series:
Professor Daniela Bortoletto (Department of Physics, University of Oxford)
The Higgs Boson and Particle Physics at the LHC: a Progress Report and Future Plans
On Monday, February 16, at 12:00 in L5, a seminar in the String Theory series:
Sakura Schafer-Nameki (Kings College London)
TBA
On Monday, February 16, at 14:15 in L5, a seminar in the Geometry and Analysis series:
Gil Cavalcanti (Utrecht)
The topology of log-symplectic manifolds
On Tuesday, February 17, at 12:00 in L5, a seminar in the Quantum Field Theory series:
John Cardy
Thermalisation and Revivals following a Quantum Quench in a 1+1-dimensional CFT
Further information: In a quantum quench, a system is prepared in some state $|\psi_0\rangle$, usually the ground state of a hamiltonian $H_0$, and then evolved unitarily with a different hamiltonian $H$. I study this problem when $H$ is a 1+1-dimensional conformal field theory on a large circle of length $L$, and the initial state has short-range correlations and entanglement. I argue that (a) for times $\ell/2 On Tuesday, February 17, at 15:45 in L3, a seminar in the Algebraic and Symplectic Geometry series: Lu Wang (Imperial) Geometry of Two-dimensional Self-shrinkers On Thursday, February 19, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series: TBC (TBC) Planck results discussion On Thursday, February 19, at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series: Jonas Lindert (University of Zurich) NLO EW and QCD corrections with OpenLoop On Friday, February 20, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series: Marc Barthelemy (CEA-IPhT) Urban systems: a physicist's perspective On Friday, February 20, at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series: Professor Jo Dunkley (Department of PHysics, University of Oxforh) Cosmology from the Microwave Background On Monday, February 23, at 12:00 in L5, a seminar in the String Theory series: Boris Pioline (Pierre and Marie Curie University) TBA On Monday, February 23, at 14:15 in L5, a seminar in the Geometry and Analysis series: Nigel Hitchin (Oxford) Folded hyperkähler manifolds Further information: The lecture will introduce the notion of a folded 4-dimensional hyperkähler manifold, give examples and prove a local existence theorem from boundary data using twistor methods, following an idea of Biquard. On Tuesday, February 24, at 15:45 in L4, a seminar in the Algebraic and Symplectic Geometry series: Daniel Grieser (Oldenberg) TBA On Thursday, February 26, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series: Sven Krippendorf (University of Oxford) SUSY breaking in string theory On Thursday, February 26, at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series: Dominik Stoeckinger (TU Dresden) g-2 of the muon Further information: http://iktp.tu-dresden.de/index.php?id=mitarbeiter&tx_iktpmemberview_pi1[memId]=93 On Friday, February 27, at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series: Professor Bernhard Keimer (Max-Planck Institute for Solid State Research) High-temperature Superconductivity: New Insights and Perspectives On Monday, March 2, at 12:00 in L5, a seminar in the String Theory series: George Papadopoulos (Kings College London) TBA On Monday, March 2, at 12:00 in L3, a seminar in the Geometry and Analysis series: James Sparks (Oxford) The geometry of rigid supersymmetry On Tuesday, March 3, at 12:00 in L5, a seminar in the Quantum Field Theory series: Xavier Calmet (Sussex) Black Holes and Effective Theory for Quantum Gravity On Tuesday, March 3, at 15:45 in L4, a seminar in the Algebraic and Symplectic Geometry series: Dmitry Tonkonog (Cambridge) The closed-open string map for S^1-invariant Lagrangians Further information: Given a Lagrangian submanifold invariant under a Hamiltonian loop, we partially compute the image of the loop's Seidel element under the closed-open string map into the Hochschild cohomology of the Lagrangian. This piece captures the homology class of the loop's orbits on the Lagrangian and can help to prove that the closed-open map is injective in some examples. As a corollary we prove that$\mathbb{RP}^n$split-generates the Fukaya category of$\mathbb{CP}^n$over a field of characteristic 2, and the same for real loci of some other toric varieties. On Thursday, March 5, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series: David Marsh (University of Oxford) TBC On Thursday, March 5, at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series: Valya Khoze (IPPP Durham) Scale of new physics from multi-H,W Further information: arXiv:1411.5633 On Friday, March 6, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series: Charles Marcus (Niels Bohr Inst) tba On Friday, March 6, at 16:15 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in the Colloquia series: Professor Robert Fosbury (European Southern Observatory) Colours from Earth: preparing for exo-earth characterisation On Friday, March 6, at 16:30 in L1, a seminar in the Math Colloquium series: Prof. Yuri Manin (Max Planck Institute and Northwestern University) Big Bang, Blow Up, and Modular Curves: Algebraic Geometry in Cosmology Further information: Based upon our joint work with M. Marcolli, I will introduce some algebraic geometric models in cosmology related to the 'boundaries' of space-time: Big Bang, Mixmaster Universe, and Roger Penrose's crossovers between aeons. We suggest to model the kinematics of Big Bang using the algebraic geometric (or analytic) blow up of a point$x$. This creates a boundary which consists of the projective space of tangent directions to$x$and possibly of the light cone of$x\$. We argue that time on the boundary undergoes the Wick rotation and becomes purely imaginary. The Mixmaster (Bianchi IX) model of the early history of the universe is neatly explained in this picture by postulating that the reverse Wick rotation follows a hyperbolic geodesic connecting imaginary time axis to the real one. Roger Penrose's idea to see the Big Bang as a sign of crossover from 'the end of the previous aeon' of the expanding and cooling Universe to the 'beginning of the next aeon' is interpreted as an identification of a natural boundary of Minkowski space at infinity with the Bing Bang boundary.
On Monday, March 9, at 14:15 in L5, a seminar in the Geometry and Analysis series:
Gergely Berczi (Oxford)
Invariants for parametrised subgroups of GL(n)
On Thursday, March 12, at 13:00 in Dalitz Institute, DWB, a seminar in the Particle Phenomenology Forum series:
Jim Talbert (University of Oxford)
Soft collinear effective theory
On Thursday, March 12, at 16:15 in Sciama Lecture Theatre, a seminar in the Particles and fields series:
Ernest Ma (University of California, Riverside)
Dark matter from Higgs decay
On Friday, March 13, at 16:30 in L1, a seminar in the Math Colloquium series:
Professor Jorge Nocedal (Northwestern University)
Recent Advances in Optimization Methods for Machine Learning
Further information: Optimization methods for large-scale machine learning must confront a number of challenges that are unique to this discipline. In addition to being scalable, parallelizable and capable of handling nonlinearity (even non-convexity), they must also be good learning algorithms. These challenges have spurred a great amount of research that I will review, paying particular attention to variance reduction methods. I will propose a new algorithm of this kind and illustrate its performance on text and image classification problems.
On Friday, May 1, at 16:30 in L1, a seminar in the Math Colloquium series:
Martin Hairer (University of Warwick)
Taming infinities
Further information: Some physical and mathematical theories have the unfortunate feature that if one takes them at face value, many quantities of interest appear to be infinite! Various techniques, usually going under the common name of “renormalisation” have been developed over the years to address this, allowing mathematicians and physicists to tame these infinities. We will tip our toes into some of the mathematical aspects of these techniques and we will see how they have recently been used to make precise analytical statements about the solutions of some equations whose meaning was not even clear until recently.
On Friday, May 15, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series:
Pasquale Blasi (Acietri)
tba
On Friday, May 29, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in the Theoretical Physics Colloquia series:
Marc Mezard (ENS, Paris)
tba