Measurement of stimulated Hawking emission in an analogue system.
- S. Weinfurtner, E. Tedford, M. Penrice, W. Unruh, G. Lawrence
- PhysicsPhysical Review Letters
- 11 August 2010
The analogy between the propagation of fields around black holes and surface waves on moving water and the measured amplitudes of the converted waves demonstrate the thermal nature of the conversion process for this system attest to the generality of the Hawking process.
Quantum gravity without Lorentz invariance
- T. Sotiriou, M. Visser, S. Weinfurtner
- Physics
- 18 May 2009
There has been a significant surge of interest in Hoyrava's model for 3+1 dimensional quantum gravity, this model being based on anisotropic scaling at a z = 3 Lifshitz point. Hoyrava's model, and…
Phenomenologically viable Lorentz-violating quantum gravity.
- T. Sotiriou, M. Visser, S. Weinfurtner
- PhysicsPhysical Review Letters
- 28 April 2009
An extension of Horava's model that abandons "detailed balance" and regains parity invariance, and in 3+1 dimensions exhibit all five marginal and four relevant operators, as determined by power counting.
On the robustness of entanglement in analogue gravity systems
- David Edward Bruschi, N. Friis, I. Fuentes, S. Weinfurtner
- Physics
- 16 May 2013
We investigate the possibility of generating quantum-correlated quasi-particles utilizing analogue gravity systems. The quantumness of these correlations is a key aspect of analogue gravity effects…
Observation of superradiance in a vortex flow
- T. Torres, Sam Patrick, Antonin Coutant, M. Richartz, E. Tedford, S. Weinfurtner
- Education
- 19 December 2016
School of Mathematical Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK Centro de Matemática, Computação e Cognição, Universidade Federal do ABC (UFABC), 09210170 Santo…
Generating perfect fluid spheres in general relativity
- P. Boonserm, M. Visser, S. Weinfurtner
- Physics
- 2 March 2005
Ever since Karl Schwarzschild's 1916 discovery of the spacetime geometry describing the interior of a particular idealized general relativistic star--a static spherically symmetric blob of fluid with…
Rotational superradiant scattering in a vortex flow
- T. Torres, Sam Patrick, Antonin Coutant, M. Richartz, E. Tedford, S. Weinfurtner
- Physics
- 12 June 2017
When an incident wave scatters off of an obstacle, it is partially reflected and partially transmitted. In theory, if the obstacle is rotating, waves can be amplified in the process, extracting…
New Semiclassical Picture of Vacuum Decay.
- Jonathan Braden, M. Johnson, H. Peiris, A. Pontzen, S. Weinfurtner
- PhysicsPhysical Review Letters
- 15 June 2018
Using lattice simulations, a new picture of vacuum decay is introduced which, in contrast to existing semiclassical techniques, provides a real-time description and does not rely on classically forbidden tunneling paths.
Spectral dimension as a probe of the ultraviolet continuum regime of causal dynamical triangulations.
- T. Sotiriou, M. Visser, S. Weinfurtner
- PhysicsPhysical Review Letters
- 27 May 2011
It is shown that, in 2 + 1 dimensions, Hořava-Lifshitz gravity can mimic the flow of the spectral dimension in causal dynamical triangulations to high accuracy and over a wide range of scales.
From dispersion relations to spectral dimension - and back again
- T. Sotiriou, M. Visser, S. Weinfurtner
- Physics
- 30 May 2011
The so-called spectral dimension is a scale-dependent number associated with both geometries and field theories that has recently attracted much attention, driven largely though not exclusively by…
...
...