Results 61 to 70 of about 38,907 (173)

Generation of Anisotropic Second‐Harmonic Petal‐Like Beams with NbOBr2 Holograms

Advanced Photonics Research, Volume 7, Issue 4, April 2026.
Highly anisotropic second‐harmonic petal‐like beams with different combinations of the topological charges of vortex beams are produced using ultrathin NbOBr2 holograms. These demonstrations provide a pathway toward the development of chip‐scale polarization‐sensitive functional optical devices for many applications.
Jayanta Deka, Jie Gao, Xiaodong Yang
wiley   +1 more source

On the dynamics of cosmological phase transition during Bose–Einstein condensation of dark matter in Barrow entropy-based cosmology

European Physical Journal C: Particles and Fields
Throughout the cosmic evolution of the Universe, when the temperature of a boson gas drops below a certain threshold, the Bose–Einstein condensation phenomenon may occur.
Subhra Mondal, Amitava Choudhuri
doaj   +1 more source

Generation of linear waves in the flow of Bose-Einstein condensate past an obstacle

, 2007
The theory of linear wave structures generated in Bose-Einstein condensate flow past an obstacle is developed. The shape of wave crests and dependence of amplitude on coordinates far enough from the obstacle are calculated.
A. M. Kamchatnov, G. A. El, G. B. Whitham, J. Denschlag, L. Kelvin, L. P. Pitaevskii, M. R. Andrews, N. N. Bogolyubov, R. S. Johnson, S. Burger, T. Winiecki, Yu. G. Gladush   +11 more
core   +1 more source

Long‐Range Exciton Energy Transfer in Two‐Dimensional Materials

Laser &Photonics Reviews, Volume 20, Issue 8, 17 April 2026.
This review highlights recent advances in long‐range exciton energy transfer within planar 2D‐material architectures. It emphasizes the emergence of self‐hybridized excitonpolaritons, exciton coupling to surface plasmon polaritons and plasmonic lattices, and the role of dipoledipole transfer pathways in enabling efficient nanoscale energy transport ...
Paul H. Bittorf, Maximilian Black, Hebrew Crispin, Prabhdeep Singh, Parsa Darman, Sara Darbari, Fatemeh Chahshouri, Masoud Taleb, Nahid Talebi   +8 more
wiley   +1 more source

A simple method to create a vortex in Bose-Einstein condensate of alkali atoms

, 1999
Bose-Einstein condensation in alkali atoms has materialized quite an interesting system, namely a condensate with a spin degree of freedom. In analogy with the A-phase of the superfluid $^3$He, numerous textures with nonvanishing vorticity have been ...
Isoshima, Tomoya, Machida, Kazushige, Nakahara, Mikio, Ogawa, Shin-ichiro, Ohmi, Tetsuo   +4 more
core   +1 more source

Bechgaard Salt‐Like Polymers and Their Applications in Organic Electronics

Macromolecular Rapid Communications, Volume 47, Issue 8, 17 April 2026.
The report presents a flexible conducting polymer micro‐wire grown from the vapor phase via an oxidative polymerization route. Electrical measurements show that the produced micro‐wires have relatively high conductivity and non‐linear electrical characteristics.
Bartlomiej Kolodziejczyk
wiley   +1 more source

Condensate Heating by Atomic Losses

, 2003
Atomic Bose-Einstein condensate is heated by atomic losses. Predicted depletion ranges from 1% for a uniform 3D condensate to around 10% for a quasi-1D condensate in a harmonic trap.Comment: 4 pages in RevTex, 1 eps ...
A. Görlitz, A.L. Fetter, D.A.R. Dalvit, D.A.R. Dalvit, E. Timmermans, E.P. Gross, F. Dalfovo, G. Lindblad, J. Dziarmaga, J. Javanainen, Jacek Dziarmaga, K. Davis, Krzysztof Sacha, L.P. Pitaevskii, M.H. Anderson, M.W. Jack, S. Burger, Y. Castin   +17 more
core   +1 more source

Entangled Photon Pair Generator Via Biexciton–Exciton Cascade in Semiconductor Quantum Dots and its Simulation

Advanced Quantum Technologies, Volume 9, Issue 4, April 2026.
In this work an entangled photon pair generator that utilizes the biexciton–exciton cascade in semiconductor quantum dots is described on a physical, mathematical, and software level for interdisciplinary audiences, leading to Kraus operators to seamlessly incorporate it into bigger simulations.
Simon Sekavčnik, Paul Kohl, Janis Nötzel   +2 more
wiley   +1 more source

Collective modes of a photon Bose–Einstein condensate with thermo-optic interaction

New Journal of Physics, 2019
Although for photon Bose–Einstein condensates the main mechanism of the observed photon–photon interaction has already been identified to be of a thermo-optic nature, its influence on the condensate dynamics is still unknown.
Enrico Stein, Frank Vewinger, Axel Pelster   +2 more
doaj   +1 more source

Optical Spectroscopy of Waveguide Coupled Er 3+ Ensembles in CaWO4 and YVO4

Advanced Quantum Technologies, Volume 9, Issue 4, April 2026.
Waveguide‐coupled spectroscopy of near‐surface Er3+ ensembles in CaWO4${\rm CaWO}_4$ and YVO4${\rm YVO}_4$ reveals pronounced surface‐induced spectral broadening in the non‐charge‐neutral host CaWO4${\rm CaWO}_4$, while YVO4${\rm YVO}_4$ largely preserves bulk‐like behavior.
Fabian Becker, Anna Selzer, Lorenz J. J. Sauerzopf, Catherine L. Curtin, Sudip KC, Tim Schneider, Kai Müller   +6 more
wiley   +1 more source