All Outputs (18)

Interferometric Unruh Detectors for Bose-Einstein Condensates (2020)
Journal Article
Gooding, C., Biermann, S., Erne, S., Louko, J., Unruh, W. G., Schmiedmayer, J., & Weinfurtner, S. (2020). Interferometric Unruh Detectors for Bose-Einstein Condensates. Physical Review Letters, 125(21), Article 213603. https://doi.org/10.1103/PhysRevLett.125.213603

The Unruh effect predicts a thermal response for an accelerated detector moving through the vacuum. Here we propose an interferometric scheme to observe an analogue of the circular Unruh effect using a localized laser coupled to a Bose-Einstein conde... Read More about Interferometric Unruh Detectors for Bose-Einstein Condensates.

Unruh and analogue Unruh temperatures for circular motion in 3+1 and 2+1 dimensions (2020)
Journal Article
Biermann, S., Erne, S., Gooding, C., Louko, J., Schmiedmayer, J., Unruh, W. G., & Weinfurtner, S. (2020). Unruh and analogue Unruh temperatures for circular motion in 3+1 and 2+1 dimensions. Physical Review D, 102(8), Article 085006. https://doi.org/10.1103/PhysRevD.102.085006

The Unruh effect states that a uniformly linearly accelerated observer with proper acceleration a experiences Minkowski vacuum as a thermal state in the temperature Tlin=a/(2?), operationally measurable via the detailed balance condition between exci... Read More about Unruh and analogue Unruh temperatures for circular motion in 3+1 and 2+1 dimensions.

Quasinormal Mode Oscillations in an Analogue Black Hole Experiment (2020)
Journal Article
Torres, T., Patrick, S., Richartz, M., & Weinfurtner, S. (2020). Quasinormal Mode Oscillations in an Analogue Black Hole Experiment. Physical Review Letters, 125(1), Article 011301. https://doi.org/10.1103/PhysRevLett.125.011301

The late stages of the relaxation process of a black hole are expected to depend only on its mass and angular momentum and not on the details of its formation process. Inspired by recent analogue gravity experiments, which demonstrate that certain bl... Read More about Quasinormal Mode Oscillations in an Analogue Black Hole Experiment.

New Semiclassical Picture of Vacuum Decay (2019)
Journal Article
Braden, J., Johnson, M. C., Peiris, H. V., Pontzen, A., & Weinfurtner, S. (2019). New Semiclassical Picture of Vacuum Decay. Physical Review Letters, 123(3), Article 031601. https://doi.org/10.1103/physrevlett.123.031601

© 2019 authors. Published by the American Physical Society. We introduce a new picture of vacuum decay which, in contrast to existing semiclassical techniques, provides a real-time description and does not rely on classically forbidden tunneling path... Read More about New Semiclassical Picture of Vacuum Decay.

Analog cosmology with two-fluid systems in a strong gradient magnetic field (2019)
Journal Article
Fifer, Z., Torres, T., Erne, S., Avgoustidis, A., Hill, R. J. A., & Weinfurtner, S. (2019). Analog cosmology with two-fluid systems in a strong gradient magnetic field. Physical Review E, 99(3), Article 031101(R). https://doi.org/10.1103/physreve.99.031101

We propose an experiment combining fluid dynamics and strong magnetic field physics to simulate cosmological scenarios. Our proposed system consists of two immiscible, weakly magnetized fluids moved through a strong gradient magnetic field. The diama... Read More about Analog cosmology with two-fluid systems in a strong gradient magnetic field.

Waves on a vortex: rays, rings and resonances (2018)
Journal Article
Torres, T., Coutant, A., Dolan, S., & Weinfurtner, S. (2018). Waves on a vortex: rays, rings and resonances. Journal of Fluid Mechanics, 857, 291-311. https://doi.org/10.1017/jfm.2018.752

We study the scattering of surface water waves with irrotational draining vortices. At small depth, this system is a mathematical analogue of a rotating black hole and can be used to mimic some of its peculiar phenomena. Using ray-tracing methods, we... Read More about Waves on a vortex: rays, rings and resonances.

Black hole quasibound states from a draining bathtub vortex flow (2018)
Journal Article
Patrick, S., Coutant, A., Richartz, M., & Weinfurtner, S. (2018). Black hole quasibound states from a draining bathtub vortex flow. Physical Review Letters, 121(6), Article 061101. https://doi.org/10.1103/physrevlett.121.061101

Quasinormal modes are a set of damped resonances that describe how an excited open system is driven back to equilibrium. In gravitational physics these modes characterize the ringdown of a perturbed black hole, e.g., following a binary black hole mer... Read More about Black hole quasibound states from a draining bathtub vortex flow.

Towards the cold atom analog false vacuum (2018)
Journal Article
Braden, J., Johnson, M. C., Peiris, H. V., & Weinfurtner, S. (2018). Towards the cold atom analog false vacuum. Journal of High Energy Physics, 2018(7), https://doi.org/10.1007/jhep07%282018%29014

Analog condensed matter systems present an exciting opportunity to simulate early Universe models in table-top experiments. We consider a recent proposal for an analog condensed matter experiment to simulate the relativistic quantum decay of the fals... Read More about Towards the cold atom analog false vacuum.

Low-frequency analogue Hawking radiation: the Korteweg–de Vries model (2018)
Journal Article
Coutant, A., & Weinfurtner, S. (2018). Low-frequency analogue Hawking radiation: the Korteweg–de Vries model. Physical Review D, 97(2), https://doi.org/10.1103/PhysRevD.97.025005

We derive analytic expressions for the low-frequency properties of the analogue Hawking radiation in a general weak-dispersive medium. A thermal low-frequency part of the spectrum is expected even when dispersive effects become significant. We consid... Read More about Low-frequency analogue Hawking radiation: the Korteweg–de Vries model.

Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model (2018)
Journal Article
Coutant, A., & Weinfurtner, S. (2018). Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model. Physical Review D, 97(2), https://doi.org/10.1103/PhysRevD.97.025006

We analytically study the low-frequency properties of the analogue Hawking effect in Bose-Einstein condensates. We show that in one-dimensional flows displaying an analogue horizon, the Hawking effect is dominant in the low-frequency regime. This hap... Read More about Low-frequency analogue Hawking radiation: The Bogoliubov-de Gennes model.

Rotational superradiant scattering in a vortex flow (2017)
Journal Article
Torres, T., Patrick, S., Coutant, A., Richartz, M., Tedford, E. . W., & Weinfurtner, S. (2017). Rotational superradiant scattering in a vortex flow. Nature Physics, 13, https://doi.org/10.1038/nphys4151

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 energy from the scatterer. Here we describe in detail th... Read More about Rotational superradiant scattering in a vortex flow.

Detecting rotational superradiance in fluid laboratories (2016)
Journal Article
Cardoso, V., Coutant, A., Richartz, M., & Weinfurtner, S. (2016). Detecting rotational superradiance in fluid laboratories. Physical Review Letters, 117(27), Article 271101. https://doi.org/10.1103/PhysRevLett.117.271101

Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed experimentally. Here, wi... Read More about Detecting rotational superradiance in fluid laboratories.

On the observation of nonclassical excitations in Bose–Einstein condensates (2016)
Journal Article
Finke, A., Jain, P., & Weinfurtner, S. (2016). On the observation of nonclassical excitations in Bose–Einstein condensates. New Journal of Physics, 18(113017), https://doi.org/10.1088/1367-2630/18/11/113017

In the recent experimental and theoretical literature well-established nonclassicality criteria from the field of quantum optics have been directly applied to the case of excitations in matter-waves. Among these are violations of Cauchy–Schwarz inequ... Read More about On the observation of nonclassical excitations in Bose–Einstein condensates.

The imprint of the analogue Hawking effect in subcritical flows (2016)
Journal Article
Coutant, A., & Weinfurtner, S. (2016). The imprint of the analogue Hawking effect in subcritical flows. Physical Review D, 94(6), Article 064026. https://doi.org/10.1103/PhysRevD.94.064026

We study the propagation of low-frequency shallow water waves on a one-dimensional flow of varying depth. When taking into account dispersive effects, the linear propagation of long-wavelength modes on uneven bottoms excites new solutions of the disp... Read More about The imprint of the analogue Hawking effect in subcritical flows.

Extrinsic curvature in two-dimensional causal dynamical triangulation (2016)
Journal Article
Glaser, L., Sotiriou, T. P., & Weinfurtner, S. (2016). Extrinsic curvature in two-dimensional causal dynamical triangulation. Physical Review D, 94(6), Article 64014. https://doi.org/10.1103/PhysRevD.94.064014

Causal dynamical triangulation (CDT) is a nonperturbative quantization of general relativity. Hořava-Lifshitz gravity, on the other hand, modifies general relativity to allow for perturbative quantization. Past work has given rise to the speculation... Read More about Extrinsic curvature in two-dimensional causal dynamical triangulation.

Rotating black holes in a draining bathtub: superradiant scattering of gravity waves (2015)
Journal Article
Richartz, M., Prain, A., Liberati, S., & Weinfurtner, S. (2015). Rotating black holes in a draining bathtub: superradiant scattering of gravity waves. Physical Review D, 91(12), Article 124018. https://doi.org/10.1103/PhysRevD.91.124018

In a draining rotating fluid flow background, surface perturbations behave as a scalar field on a rotating effective black hole spacetime. We propose a new model for the background flow which takes into account the varying depth of the water. Numeric... Read More about Rotating black holes in a draining bathtub: superradiant scattering of gravity waves.

Reducing space-time to binary information (2014)
Journal Article
Weinfurtner, S., De las Cuevas, G., Martin-Delgado, M. A., & Briegel, H. J. (2014). Reducing space-time to binary information. Journal of Physics A: Mathematical and Theoretical, 47(9), Article 095301. https://doi.org/10.1088/1751-8113/47/9/095301

We present a new description of discrete space-time in 1+1 dimensions in terms of a set of elementary geometrical units that represent its independent classical degrees of freedom. This is achieved by means of a binary encoding that is ergodic in the... Read More about Reducing space-time to binary information.

On the robustness of entanglement in analogue gravity systems (2013)
Journal Article
Bruschi, D. E., Friis, N., Fuentes, I., & Weinfurtner, S. (2013). On the robustness of entanglement in analogue gravity systems. New Journal of Physics, 15(113016), https://doi.org/10.1088/1367-2630/15/11/113016

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 and their presence allows for a clear separation bet... Read More about On the robustness of entanglement in analogue gravity systems.