Pattison, Chris Vennin, Vincent Assadullahi, Hooshyar Wands, David

It is often claimed that the ultra-slow-roll regime of inflation, where the dynamics of the inflaton field are friction dominated, is a non-attractor and/or transient. In this work we carry out a phase-space analysis of ultra-slow roll in an arbitrary potential, $V(\phi)$. We show that while standard slow roll is always a dynamical attractor whenev...

Ben Geloun, Joseph Kegeles, Alexander Pithis, Andreas

We study the the Euler-Lagrange equation of the dynamical Boulatov model, which is a simplicial model for 3D gravity augmented by a Laplace-Beltrami operator. We provide all its solutions on the space of left and right invariant functions that render the interaction of the model an equilateral tetrahedron. Surprisingly, for a nonlinear equation, th...

Ben Achour, Jibril Livine, Etera

At the heart of the issue of quantizing general relativity lies the puzzling question of defining a version of space-time diffeomorphisms compatible with the Planck length $\ell_{P}$. Implementing continuous space-time symmetries while preserving a universal minimal length scale seem to be two conflicting fundamental aspects of quantum gravity. We ...

Barack, Leor Cardoso, Vitor Nissanke, Samaya Sotiriou, Thomas Askar, Abbas Belczynski, Chris Bertone, Gianfranco Bon, Edi Blas, Diego Brito, Richard
...

The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem---all involve gravity as a key component. And of all gravitational phenomena, black holes stand out in their elegant simplicity, while harbouring some of the most remarka...

BAUDRIMONT, Roman

Le but de ce papier est de montrer une nouvelle approche d'unification entre la théorie de la relativité générale et la physique quantique. Pour cela, nous nous basons sur la thermodynamique, la mécanique des fluides ainsi que la théorie de l'information. Nous verrons alors que l'entropie de Shannon, de Boltzmann et de Von Neumann peuvent être la s...

Wcisło, P. Ablewski, P. Beloy, K. Bilicki, S. Bober, M. Brown, R. Fasano, R. Ciuryło, R. Hachisu, H. Ido, T.
...

We report on the first earth-scale quantum sensor network based on optical atomic clocks aimed at dark matter (DM) detection. Exploiting differences in the susceptibilities to the fine-structure constant of essential parts of an optical atomic clock, i.e. the cold atoms and the optical reference cavity, we can perform sensitive searches for dark ma...

Bjerrum-Bohr, N.E. Damgaard, Poul Festuccia, Guido Planté, Ludovic Vanhove, Pierre

We outline the program to apply modern quantum field theory methods to calculate observables in classical general relativity through a truncation to classical terms of the multi-graviton two-body on-shell scattering amplitudes between massive fields. Since only long-distance interactions corresponding to non-analytic pieces need to be included, uni...

Euvé, Léo-Paul Robertson, Scott James, Nicolas Fabbri, Alessandro Rousseaux, Germain

We have realized a stationary transcritical flow of water in a flume that possesses the analogue of a black hole horizon for long-wavelength surface waves. The horizon has been probed via the scattering of an incident co-current wave, which partially scatters into counter-current waves on either side of the horizon, yielding three outgoing waves (o...

Wcisło, P. Ablewski, P. Beloy, K. Bilicki, S. Bober, M. Brown, R. Fasano, R. Ciuryło, R. Hachisu, H. Ido, T.
...

We report on the first earth-scale quantum sensor network based on optical atomic clocks aimed at dark matter (DM) detection. Exploiting differences in the susceptibilities to the fine-structure constant of essential parts of an optical atomic clock, i.e. the cold atoms and the optical reference cavity, we can perform sensitive searches for dark ma...

Euvé, Léo-Paul Robertson, Scott James, Nicolas Fabbri, Alessandro Rousseaux, Germain

We have realized a stationary transcritical flow of water in a flume that possesses the analogue of a black hole horizon for long-wavelength surface waves. The horizon has been probed via the scattering of an incident co-current wave, which partially scatters into counter-current waves on either side of the horizon, yielding three outgoing waves (o...