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The dynamics of spin-boson systems at very low temperatures has been studied using a real-time path-integral simulation technique which combines a stochastic Monte Carlo sampling over the quantum fluctuations with an exact treatment of the…

chem-ph · Physics 2009-10-22 Reinhold Egger , C. H. Mak

We consider the possibility to produce a bouncing universe in the framework of scalar-tensor gravity models in which the scalar field potential may be negative, and even unbounded from below. We find a set of viable solutions with nonzero…

General Relativity and Quantum Cosmology · Physics 2015-07-15 B. Boisseau , H. Giacomini , D. Polarski , A. A. Starobinsky

The problem of successfully simulating ionic fluids at low temperature and low density states is well known in the simulation literature: using conventional methods, the system is not able to equilibrate rapidly due to the presence of…

Soft Condensed Matter · Physics 2015-05-14 Chantal Valeriani , Philip J. Camp , Jos W. Zwanikken , René van Roij , Marjolein Dijkstra

The performance of a particle accelerator can be limited by the build-up of an electron cloud (EC) in the vacuum chamber. Secondary electron emission from the chamber walls can contribute to EC growth. An apparatus for in-situ measurements…

Space-time methods promise more efficient time-domain simulations, in particular of electrical machines. However, most approaches require the motion to be known in advance so that it can be included in the space-time mesh. To overcome this…

Numerical Analysis · Mathematics 2026-05-19 Michael Reichelt , Michael Wiesheu , Melina Merkel , Sebastian Schöps , Olaf Steinbach

High-altitude balloon experiments are becoming very popular among universities and research institutes as they can be used for testing instruments eventually intended for space, and for simple astronomical observations of Solar System…

Instrumentation and Methods for Astrophysics · Physics 2021-02-10 Akaash Srikanth , Bharat Chandra , Binukumar G Nair , Nirmal K , Margarita Safonova , Shanti Prabha , Rekhesh Mohan , Jayant Murthy , Rajini G. K

Structures seen in idealized numerical experiments on compressible magnetoconvection in an imposed strong vertical magnetic field show important differences from those detected in observations or realistic numerical simulations of sunspot…

Solar and Stellar Astrophysics · Physics 2016-03-08 C. Tian , K. Petrovay

InSb$_{1-x}$As$_{x}$ is a promising material system for exploration of topological superconductivity in hybrid superconductor/semiconductor devices due to large effective g-factor and enhanced spin-orbit coupling when compared to binary…

Mesoscale and Nanoscale Physics · Physics 2022-07-06 S. Metti , C. Thomas , D. Xiao , M. J. Manfra

We analytically work out the orbital effects caused by a Rindlertype extra-acceleration ARin which naturally arises in some recent models of modified gravity at large distances. In particular, we focus on the perturbations induced by it on…

General Relativity and Quantum Cosmology · Physics 2011-05-24 Lorenzo Iorio

We investigate vortex states in Bose-Einstein condensates under the combined action of the spin-orbit coupling (SOC), gradient magnetic field, and harmonic-oscillator trapping potential. The linear version of the system is solved exactly.…

Quantum Gases · Physics 2024-02-06 Huan-Bo Luo , Lu Li , Boris A. Malomed , Yongyao Li , Bin Liu

In this paper, we present a new experimental facility, Little Earth Experiment, designed to study the hydrodynamics of liquid planetary cores. The main novelty of this apparatus is that a transparent electrically conducting electrolyte is…

Geophysics · Physics 2016-08-24 Kelig Aujogue , Alban Potherat , Ian Bates , François Debray , Binod Sreenivasan

Cold atoms have become a powerful platform for quantum-simulating lattice gauge theories in higher spatial dimensions. However, such realizations have been restricted to the lowest possible truncations of the gauge field, which limit the…

Gravimeters are devices which measure changes in the value of the gravitational acceleration, \textit{g}. This information is used to infer changes in density under the ground allowing the detection of subsurface voids; mineral, oil and gas…

Instrumentation and Detectors · Physics 2018-03-30 Steven G Bramsiepe , David Loomes , Richard P Middlemiss , Douglas J Paul , Giles D Hammond

In cosmological evolution, it is the homogeneous scalar field (inflaton) that drives the universe to expand isotropically and to generate standard model particles. However, to simulate cosmology, atomic gas research has focused on the…

Quantum Gases · Physics 2024-01-23 Ke Wang , Han Fu , K. Levin

We propose an experiment to test the effects of gravity and acceleration on quantum entanglement in space-based setups. We show that the entanglement between excitations of two Bose-Einstein condensates is degraded after one of them…

Recent analysis of scientific data from Cassini and earth-based observations gave evidence for a global ocean under a surrounding solid ice shell on Saturn's moon Enceladus. Images of Enceladus' South Pole showed several fissures in the ice…

In the post-Newtonian era, the Eddington-inspired Born-Infeld (EiBI) theory, considered as an improved modification of the Einsteinian general relativity formalism in the weak field regime (non-relativistic), has enabled us to study the…

General Relativity and Quantum Cosmology · Physics 2024-12-04 Souvik Das , Pralay Kumar Karmakar

Various proposed space elevators may bypass the financial and environmental limits on rocket technology, but all have their own problems. A Low-Earth-Orbit, LEO, rotovator-based space-elevator version called 'sling-on-a-ring' may overcome…

General Physics · Physics 2015-05-28 Andrew Meulenberg , Timothy Poston

The author applies, develops and researches mini-sized Micro- AB Thermonuclear Reactors for space propulsion and space power systems. These small engines directly convert the high speed charged particles produced in the thermonuclear…

General Physics · Physics 2007-05-23 Alexander Bolonkin

We study the dynamics of the non-relativistic spinning test body (STB) in the framework of Einstein-Cartan theory(ECT), in which the weak equivalence principle is violated by the spin-gravitational interaction. We derive the general…

General Relativity and Quantum Cosmology · Physics 2025-04-01 Kun Hu , Zhiyuan Yu , Taotao Qiu , Zhongkun Hu