# All Upcoming Events

On Thursday at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Felix Kahlhoefer (DESY)

WIMP inflation from scalar singlets

On Thursday at 13:30 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Alexander Braverman (Brown University)

Recent advances in symplectic duality (COW SEMINAR)

**Further information:**It has been observed long time ago (by many people) that singular affine symplectic varieties come in pairs; that is often to an affine singular symplectic variety $X$ one can associate a dual variety $X^!$; the geometries of $X$ and $X^!$ (and their quantizations) are related in a non-trivial way. The purpose of the talk will be 3-fold: 1) Explain a set of conjectures of Braden, Licata, Proudfoot and Webster which provide an exact formulation of the relationship between $X$ and $X^!$ 2) Present a list of examples of symplectically dual pairs (some of them are very recent); in particular, we shall explain how the symplectic duals to Nakajima quiver varieties look like. 3) Give a new approach to the construction of $X^!$ and a proof of the conjectures from part 1). The talk is based on a work in progress with Finkelberg and Nakajima.

On Thursday at 14:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Martin Ulirsch (University of Bonn)

The moduli stack of tropical curves (COW SEMINAR)

**Further information:**The moduli space of tropical curves (and its variants) is one of the most-studied objects in tropical geometry. So far this moduli space has only been considered as an essentially set-theoretic coarse moduli space (sometimes with additional structure). As a consequence of this restriction, the tropical forgetful map does not define a universal curve (at least in the positive genus case). The classical work of Knudsen has resolved a similar issue for the algebraic moduli space of curves by considering the fine moduli stacks instead of the coarse moduli spaces. In this talk I am going to give an introduction to these fascinating tropical moduli spaces and report on ongoing work with R. Cavalieri, M. Chan, and J. Wise, where we propose the notion of a moduli stack of tropical curves as a geometric stack over the category of rational polyhedral cones. Using this framework one can give a natural interpretation of the forgetful morphism as a universal curve. The coarse moduli space arises as the set of $\mathbb{R}_{\geq 0}$-valued points of the moduli stack. Given time, I will also explain how the process of tropicalization for these moduli stacks can be phrased in a more fundamental way using the language of logarithmic algebraic stacks.

On Thursday at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Niels Obers (NBI Copenhagen)

The return of Newton-Cartan space-time

On Friday at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Julien Tailleur (Paris Diderot)

Statistical Physics of Active Matter

On Friday at 15:30 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in
the Colloquia series:

Dr Samaya Nissanke (Radboud University Nijmegen, the Netherlands)

Follow the Chirp: Searching and Characterizing Electromagnetic Counterparts of Gravitational Wave Sources

On Friday at 16:00 in L1, a seminar in
the Math Colloquium series:

Sergiu Klainerman (Princeton University, NJ)

Are Black Holes Real ?

**Further information:**The talk will consider three well-defined problems which can be interpreted as mathematical tests of the physical reality of black holes: Rigidity, stability and formation of black holes.

On Monday at 12:00 in L3, a seminar in
the String Theory series:

Francis Brown (Oxford)

TBA

On Monday at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Daniel Halpern-Leistner (Columbia)

tba

On Tuesday at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Ivette Fuentes (University of Vienna)

Quantum systems as spacetime probes

**Further information:**Hawking radiation and particle creation by an expanding Universe are paradigmatic predictions of quantum field theory in curved spacetime. Although the theory is a few decades old, it still awaits experimental demonstration. At first sight, the effects predicted by the theory are too small to be measured in the laboratory. Therefore, current experimental efforts have been directed towards siumlating Hawking radiation and studying quantum particle creation in analogue spacetimes. In this talk, I will present a proposal to test directly effects of quantum field theory in the Earth's spacetime using quantum technologies. Under certain circumstances, real spacetime distortions (such as gravitational waves) can produce observable effects in the state of phonons of a Bose-Einstein condensate. The sensitivity of the phononic field to the underlying spacetime can also be used to measure spacetime parameters such as the Schwarzschild radius of the Earth.

On Tuesday at 14:00 in 501, DWB (Seminar Room), a seminar in
the Holography series:

Ben Withers (U. Southampton)

Self-Similar Equilibration of Strongly Coupled CFTs from Holography

On Tuesday at 15:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Daniel Halpern-Leistner (Columbia)

TBA

On Wednesday at 13:30 in L2, a seminar in
the Strings Junior series:

Dr Eduardo Casali (Mathematical Institute)

On Thursday, December 3, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Daniel Egana-Ugrinovic (Rutgers)

The low energy theories of the Higgs sector

On Thursday, December 3, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Stephen West (Royal Holloway)

Big Bang synthesis of nuclear dark matter

**Further information:**arXiv:1411.3739

On Tuesday, December 8, at 14:00 in 501 DWB, a seminar in
the Holography series:

Jiunn-Wei Chen (National Taiwan University)

TBA

On Thursday, January 21, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Claudio Coriano (Southampton U & Lecce U)

Gauged axions and anomalous Abelian symmetries

On Friday, January 22, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Christophe Pichon (IAP)

tba

On Thursday, January 28, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Joachim Brod (U. Mainz)

TBA

On Friday, January 29, at 16:00 in L1, a seminar in
the Math Colloquium series:

Mark Newman (Univ. of Michigan)

tba

On Thursday, February 4, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Andreas Ringwald (DESY Hamburg)

The hunt for axions

On Thursday, February 11, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

TBD (TBD)

TBA

On Friday, February 12, at 16:00 in L1, a seminar in
the Math Colloquium series:

Isabelle Gallagher (University of Paris-Diderot)

tbc

On Thursday, February 18, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Giovanni Ridolfi (University of Genova)

TBA

On Thursday, February 25, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Jeppe Andersen (IPPP Durham)

TBA

On Thursday, March 3, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

TBD (TBD)

TBA

On Thursday, March 10, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

TBD (TBD)

TBA

On Friday, June 3, at 16:00 in L1, a seminar in
the Math Colloquium series:

Bernd Sturmfels (UC Berkeley)

tba

On Friday, June 17, at 16:00 in L1, a seminar in
the Math Colloquium series:

David Vogan (MIT)

tbc