Zobrazeno 1 - 10
of 2 536
pro vyhledávání: '"Bose–Einstein condensates"'
Publikováno v:
Results in Physics, Vol 64, Iss , Pp 107935- (2024)
Machine learning has been a powerful tool to study various models in many fields, which requires plenty of data to ensure accuracy. It is a challenge to reduce the dependence on the amount of data and ensure that the predictions are both accurate and
Externí odkaz:
https://doaj.org/article/ce77e807561240ab99860c8da25f16e9
Autor:
Boris A. Malomed
Publikováno v:
Advances in Physics: X, Vol 9, Iss 1 (2024)
ABSTRACTThis concise review aims to provide a summary of the most relevant recent experimental and theoretical results for solitons, i.e. self-trapped bound states of nonlinear waves, in two- and three-dimensional (2D and 3D) media. In comparison wit
Externí odkaz:
https://doaj.org/article/62770ebd6a784de68e63402116e1fa9a
Publikováno v:
Comptes Rendus. Physique, Vol , Iss , Pp 1-20 (2023)
We make use of an analog gravity perspective to obtain a physical understanding of hydrodynamic instabilities stemming from the presence of quantized vortices in two-component atomic condensates and of their relation to ergoregion instabilities of ro
Externí odkaz:
https://doaj.org/article/735e74a22d9a4bd3a88c879ac83bbaf4
Autor:
Hofmann, Johannes, Zwerger, Wilhelm
Publikováno v:
Comptes Rendus. Physique, Vol , Iss , Pp 1-18 (2023)
We show that the discrete set of pair amplitudes $A_m$ introduced by Haldane are an angular-momentum resolved generalization of the Tan two-body contact, which parametrizes universal short-range correlations in atomic quantum gases. The pair amplitud
Externí odkaz:
https://doaj.org/article/48e6afaed0e2420aa2f2e33e554387a7
Autor:
Eng Boon Ng, C.H. Raymond Ooi
Publikováno v:
Results in Physics, Vol 52, Iss , Pp 106870- (2023)
We examine the use of Laguerre–Gaussian (LG) laser beams in the tripod scheme to create the coupling between spin and orbital angular momentum in a Bose–Einstein condensate (BEC) confined by a harmonic trap. We derive and solve the Gross–Pitaev
Externí odkaz:
https://doaj.org/article/aa013cf6605b478abb673a3244b4391b
Publikováno v:
Results in Physics, Vol 52, Iss , Pp 106842- (2023)
In this paper, by modifying loss function MSE and training area of the physics-informed neural network (PINN), we proposed two neural network models: mix-training PINN and prior information mix-training PINN. We demonstrated the advantages of these m
Externí odkaz:
https://doaj.org/article/d98dcbfabcec41b6be10bf680d8f5ba0
Publikováno v:
Results in Physics, Vol 49, Iss , Pp 106534- (2023)
Generating stable bright solitons in free space has been a long-standing goal in the study of matter waves in Bose-Einstein condensates (BECs). Rydberg-induced matter wave demonstrates an excellent effect in balancing the repulsive and attractive int
Externí odkaz:
https://doaj.org/article/3ef98526c2984f659d5aa2eed63002e2
Publikováno v:
Photonics, Vol 11, Iss 3, p 205 (2024)
We theoretically studied the quantum dynamics of a cavity–Bose–Einstein condensate (BEC) system in a gravitational field, which is composed of a Fabry–Pérot cavity and a BEC. We also show how to deterministically generate the transient macrosc
Externí odkaz:
https://doaj.org/article/6e30ecb263aa4baeb35d42d5343ab6e5
Autor:
Boris A. Malomed
Publikováno v:
Entropy, Vol 26, Iss 2, p 137 (2024)
This article presents a concise survey of basic discrete and semi-discrete nonlinear models, which produce two- and three-dimensional (2D and 3D) solitons, and a summary of the main theoretical and experimental results obtained for such solitons. The
Externí odkaz:
https://doaj.org/article/864f85ba0a6e417ebd7a94252e2dd540
Publikováno v:
New Journal of Physics, Vol 26, Iss 9, p 093020 (2024)
We analytically and numerically study three-component rogue waves (RWs) in spin-1 Bose–Einstein condensates with Raman-induced spin–orbit coupling (SOC). Using the multiscale perturbative method, we obtain approximate analytical solutions for RWs
Externí odkaz:
https://doaj.org/article/b94d7a85567b4c06a7d4897653a3e213