Publications (12)
Annihilation of Point Defect Pairs in Freely Suspended Liquid-Crystal Films
Amine Missaoui, Kirsten Harth, Peter Salamon +1
We study the annihilation of topological defect pairs in the quasi-twodimensional (2D) geometry of freely suspended smectic films. This elementary process is at the basis of all mo…
Flashing flexodomains and electroconvection rolls in a nematic liquid crystal
Peter Salamon, Nandor Eber, Alexei Krekhov +1
Pattern forming instabilities induced by ultralow frequency sinusoidal voltages were studied in a rod-like nematic liquid crystal by microscopic observations and simultaneous elect…
Quantum finite-time thermodynamics: insight from a single qubit engine
Roie Dann, Ronnie Kosloff, Peter Salamon
Incorporating time into thermodynamics allows addressing the tradeoff between efficiency and power. A qubit engine serves as a toy model to study this tradeoff from first principle…
Controllability on relaxation-free subspaces: On the relationship between adiabatic population transfer and optimal control
Haidong Yuan, Christiane Koch, Peter Salamon +1
We consider the optimal control problem of transferring population between states of a quantum system where the coupling proceeds only via intermediate states that are subject to d…
Estimating Classification Confidence Using Kernel Densities
Peter Salamon, David Salamon, V. Adrian Cantu +4
This paper investigates the post-hoc calibration of confidence for "exploratory" machine learning classification problems. The difficulty in these problems stems from the continuin…
Patterns driven by combined AC and DC electric fields in nematic liquid crystals
Alexei Krekhov, Werner Decker, Werner Pesch +4
The effect of superimposed ac and dc electric fields on the formation of electroconvection and flexoelectric patterns in nematic liquid crystals was studied. For selected ac freque…
The Quantum Refrigerator: The quest for absolute zero
Yair Rezek, Peter Salamon, Karl Heinz Hoffmann +1
The scaling of the optimal cooling power of a reciprocating quantum refrigerator is sought as a function of the cold bath temperature as . The working medium consists of…
Quantum heat engines: limit cycles and exceptional points
Andrea Insinga, Bjarne Andresen, Peter Salamon +1
We show that the inability of a quantum Otto cycle to reach a limit cycle is connected with the propagator of the cycle being non-compact. For a working fluid consisting of quantum…
Estimating ensemble likelihoods for the Sentinel-1 based Global Flood Monitoring product of the Copernicus Emergency Management Service
Christian Krullikowski, Candace Chow, Marc Wieland +8
The Global Flood Monitoring (GFM) system of the Copernicus Emergency Management Service (CEMS) addresses the challenges and impacts that are caused by flooding. The GFM system prov…
Social Media Alerts can Improve, but not Replace Hydrological Models for Forecasting Floods
Valerio Lorini, Carlos Castillo, Domenico Nappo +2
Social media can be used for disaster risk reduction as a complement to traditional information sources, and the literature has suggested numerous ways to achieve this. In the case…
Inhibited pattern formation by asymmetrical high voltage excitation in nematic fluids
Peter Salamon, Nandor Eber, Balazs Fekete +1
In contrast to the predictions of the standard theory of electroconvection (EC), our experiments showed that the action of superposed ac and dc voltages rather inhibits pattern for…
Undulations of smectic A layers in achiral liquid crystals manifested as stripe textures
Natalia Podoliak, Peter Salamon, Lubor LejÄek +2
Self-assembly of organic molecules represents a fascinating playground to create various liquid crystalline (LC) nanostructures. In this work, we study layer undulations on microme…