Bena, Iosif Eperon, Felicity Heidmann, Pierre Warner, Nicholas P.
Published in
Journal of High Energy Physics

We compute the quasi-normal frequencies of scalars in asymptotically-flat microstate geometries that have the same charge as a D1-D5-P black hole, but whose long BTZ-like throat ends in a smooth cap. In general the wave equation is not separable, but we find a class of geometries in which the non-separable term is negligible and we can compute the ...

Alkhateeb, M. Matzkin, A.

The "particle in a box" problem is investigated for a relativistic particle obeying the Klein-Gordon equation. To find the bound states, the standard methods known from elementary non-relativistic quantum mechanics can only be employed for "shallow" wells. For deeper wells, when the confining potentials become supercritical, we show that a method b...

Ghosh, Jewel K. Kiritsis, Elias Nitti, Francesco Witkowski, Lukas T.

Coleman-de Luccia processes for AdS to AdS decays in Einstein-scalar theories are studied. Such tunnelling processes are interpreted as vev-driven holographic RG flows of a quantum field theory on de Sitter space-time. These flows do not exist for generic scalar potentials, which is the holographic formulation of the fact that gravity can act to st...

Barrau, Aurélien Ferdinand, Léonard Martineau, Killian Renevey, Cyril

The idea that, after their evaporation, Planck-mass black holes might tunnel into metastable white holes has recently been intensively studied. Those relics have been considered as a dark matter candidate. We show that the model is severely constrained and underline some possible detection paths. We also investigate, in a more general setting, the ...

Ruggiero, Paola Foini, Laura Giamarchi, Thierry

We study the effect of a quantum quench between two tunnel coupled Tomonaga-Luttinger liquids (TLLs) with different speed of sound and interaction parameter. The quench dynamics is induced by switching off the tunnelling and letting the two systems evolve independently. We fully diagonalize the problem within a quadratic approximation for the initi...

Dunnett, Angus J. Chin, Alex W.
Published in
Frontiers in Chemistry

For complex molecules, nuclear degrees of freedom can act as an environment for the electronic “system” variables, allowing the theory and concepts of open quantum systems to be applied. However, when molecular system-environment interactions are non-perturbative and non-Markovian, numerical simulations of the complete system-environment wave funct...

Philipose, Usha Jiang, Yan Farmer, Gavin Howard, Chris Harcrow, Michael Littler, Chris Lopes, Vincent Syllaios, Athanasios J Sood, Ashok Zeller, John W
...
Published in
Nanomaterials (Basel, Switzerland)

In this work, we use contrast image processing to estimate the concentration of multi-wall carbon nanotubes (MWCNT) in a given network. The fractal dimension factor (D) of the CNT network that provides an estimate of its geometrical complexity, is determined and correlated to network resistance. Six fabricated devices with different CNT concentrati...

Gack, Nicolas Iankevich, Gleb Benel, Cahit Kruk, Robert Wang, Di Hahn, Horst Reisinger, Thomas
Published in
Nanomaterials

The combination of magnetic and semiconducting properties in one material system has great potential for integration of emerging spintronics with conventional semiconductor technology. One standard route for the synthesis of magnetic semiconductors is doping of semiconductors with magnetic atoms. In many semiconductor–magnetic–dopant systems, the m...

Fowler, Fallon Denning, Steve Hu, Shuijin Watson, Wes
Published in
Environmental entomology

Research suggests dung beetles can churn, aerate, and desiccate dung in ways that influence the dung and soil microbes producing greenhouse gases (GHGs). We examined the impacts of the tunneling beetle, Onthophagus taurus (Schreber), and the dwelling beetle, Labarrus pseudolividus (Balthasar), on the carbon dioxide (CO2), methane (CH4), and nitrous...

Schleif, Tim Prado Merini, Melania Sander, Wolfram
Published in
Angewandte Chemie (International Ed. in English)

Matrix‐isolation studies reveal a long‐standing misconception about the benzene‐oxide/oxepin equilibrium by confirming the intrinsic greater stability of oxepin. They also find that this equilibration proceeds via a rare heavy‐atom tunneling process at cryogenic temperatures. Finally, the solvent control of heavy‐atom tunneling is demonstrated for ...