Publications for year 2015


Monday, 20 April, 2015
Noé Cuneo, Jean-Pierre Eckmann

We study a chain of four interacting rotors (rotators) connected at both ends to stochastic heat baths at different temperatures. We show that for non-degenerate interaction potentials the...

Friday, 10 April, 2015
Antonio Amariti, Davide Forcella, Claudius Klare, Domenico Orlando, Susanne Reffert

We engineer a brane picture for the reduction of Seiberg dualities from 4D to 3D, valid also in the presence of orientifold planes. We obtain effective 3D dualities on the circle by T-duality,...

Wednesday, 8 April, 2015
Rinat Kashaev

The combinatorial structure of Pachner moves in four dimensions is analyzed in the case of a distinguished move of the type (3,3) and few examples of solutions are reviewed. In particular,...

Tuesday, 7 April, 2015
Camille Bonvin, Chris Clarkson, Ruth Durrer, Roy Maartens, Obinna Umeh

We show that at second order ensemble averages of observables and directional averages do not commute due to gravitational lensing. In principle this non-commutativity is significant for a...

Monday, 6 April, 2015
Mahouton Norbert Hounkonnou, Partha Guha, Tudor S. Ratiu

We discuss the appearence of left symmetry in a generalized Virasoro algebra. The necessary and sufficient condition for this algebra to be a quasiassociative algebra with the defined...

Monday, 6 April, 2015
Jay Armas, Matthias Blau

We construct several classes of worldvolume effective actions for black holes by integrating out spatial sections of the worldvolume geometry of asymptotically flat black branes. This provides a...

Friday, 3 April, 2015
Marco Baggio, Matthias R. Gaberdiel, Cheng Peng

The symmetric orbifold of K3 is believed to be the CFT dual of string theory on AdS3 x S3 x K3 at the tensionless point. For the case when the K3 is described by the orbifold T4/Z2, we identify...

Wednesday, 1 April, 2015
François Gay-Balmaz, Michael Monastyrsky, Tudor S. Ratiu

We consider a general approach for the process of Lagrangian and Hamiltonian reduction by symmetries in chiral gauge models. This approach is used to show the complete integrability of several...

Communications in Mathematical Physics, April 2015, Volume 335, Issue 2, pp 609-636
Wednesday, 1 April, 2015
A. Pelayo, T. S. Ratiu, S. Vu Ngoc

We describe the bifurcation diagrams of almost toric integrable Hamiltonian systems on a four dimensional symplectic manifold M, not necessarily compact. We prove that, under a weak assumption,...

Journal of Symplectic Geometry, 13(2), 343-386, 2015
Monday, 30 March, 2015
Camille Bonvin, Chris Clarkson, Ruth Durrer, Roy Maartens, Obinna Umeh

It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational...

Monday, 30 March, 2015
Benoit Fresse, Thomas Willwacher

We establish that $E_n$-operads satisfy a rational intrinsic formality theorem for $n\geq 3$. We gain our results in the category of Hopf cooperads in cochain graded dg-modules, which...

Friday, 27 March, 2015
Wendelin Werner

We present a setup that enables to define in a concrete way a renormalization flow for the FK-percolation models from statistical physics (that are closely related to Ising and Potts models). In...