Density Waves in Dipolar Bose-Einstein Condensates by Means of Symbolic Computations

2014 ◽  
pp. 15-21 ◽  
Author(s):  
Alexandru I. Nicolin ◽  
Ionel Rata
Keyword(s):  
Density Waves ◽  
Symbolic Computations ◽  
Bose Einstein

scholarly journals Dynamical spin-density waves in a spin-orbit-coupled Bose-Einstein condensate

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Yan Li ◽  
Chunlei Qu ◽  
Yongsheng Zhang ◽  
Chuanwei Zhang
Keyword(s):  
Spin Density ◽  
Einstein Condensate ◽  
Spin Orbit ◽  
Density Waves ◽  
Spin Density Waves ◽  
Bose Einstein Condensate ◽  
Dynamical Spin ◽  
Bose Einstein

scholarly journals Stable Periodic Density Waves in Dipolar Bose-Einstein Condensates Trapped in Optical Lattices

2012 ◽  
Vol 108 (14) ◽  
Author(s):  
Aleksandra Maluckov ◽  
Goran Gligorić ◽  
Ljupčo Hadžievski ◽  
Boris A. Malomed ◽  
Tilman Pfau
Keyword(s):  
Optical Lattices ◽  
Density Waves ◽  
Stable Periodic ◽  
Bose Einstein

scholarly journals Faraday and Resonant Waves in Dipolar Cigar-Shaped Bose-Einstein Condensates

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1090 ◽  
Author(s):  
Dušan Vudragović ◽  
Antun Balaž
Keyword(s):  
Equations Of Motion ◽  
Mean Field ◽  
Dipole Interaction ◽  
Numerical Approach ◽  
Pitaevskii Equation ◽  
Density Waves ◽  
Oscillation Modes ◽  
Dipolar System ◽  
Bose Einstein ◽  
Resonant Waves

Faraday and resonant density waves emerge in Bose-Einstein condensates as a result of harmonic driving of the system. They represent nonlinear excitations and are generated due to the interaction-induced coupling of collective oscillation modes and the existence of parametric resonances. Using a mean-field variational and a full numerical approach, we studied density waves in dipolar condensates at zero temperature, where breaking of the symmetry due to anisotropy of the dipole-dipole interaction (DDI) plays an important role. We derived variational equations of motion for the dynamics of a driven dipolar system and identify the most unstable modes that correspond to the Faraday and resonant waves. Based on this, we derived the analytical expressions for spatial periods of both types of density waves as functions of the contact and the DDI strength. We compared the obtained variational results with the results of extensive numerical simulations that solve the dipolar Gross-Pitaevskii equation in 3D, and found a very good agreement.

Density waves in disk galaxies

1967 ◽  
Vol 31 ◽  
pp. 313-317 ◽  
Author(s):  
C. C. Lin ◽  
F. H. Shu
Keyword(s):  
Mathematical Analysis ◽  
Spiral Structure ◽  
Stellar System ◽  
Collective Modes ◽  
Disk Galaxies ◽  
Spiral Pattern ◽  
Density Waves ◽  
The Galaxy ◽  
Detailed Mathematical Analysis

Density waves in the nature of those proposed by B. Lindblad are described by detailed mathematical analysis of collective modes in a disk-like stellar system. The treatment is centered around a hypothesis of quasi-stationary spiral structure. We examine (a) the mechanism for the maintenance of this spiral pattern, and (b) its consequences on the observable features of the galaxy.

Voyager UVS observations of stellar occultations by the rings of Saturn

1984 ◽  
Vol 75 ◽  
pp. 265-277
Author(s):  
J.B. Holbelg ◽  
W.T. Forrester
Keyword(s):  
Optical Depth ◽  
Distance Scale ◽  
Density Waves ◽  
Ring Density ◽  
Stellar Occultations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTDuring the Voyager 1 and 2 Saturn encounters the ultraviolet spectrometers observed three separate stellar occultations by Saturn's rings. Together these three observations, which sampled the optical depth of the rings at resolutions from 3 to 6 km. can be used to establish a highly accurate distance scale allowing the identification of numerous ring features associated with resonances due to exterior satellites. Three separate observations of an eccentric ringlet near the location of the Titan apsidal resonance are discussed along with other ringlet-resonance associations occurring in the C ring. Density waves occurring in the A and B rings are reviewed and a detailed discussion of the analysis of one of these features is presented.

Macroscopic quantum tunneling of charge density waves

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-161-Pr10-163
Author(s):  
H. Matsukawa ◽  
H. Miyake ◽  
M. Yumoto ◽  
H. Fukuyama
Keyword(s):  
Charge Density ◽  
Quantum Tunneling ◽  
Charge Density Waves ◽  
Density Waves ◽  
Macroscopic Quantum ◽  
Macroscopic Quantum Tunneling

Phase slip scaling relationship for the 59 K and 143 K charge-density-waves in NbSe3

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-129-Pr10-132 ◽  
Author(s):  
J. P. McCarten ◽  
T. C. Jones ◽  
X. Wu ◽  
J. H. Miller ◽  
I. Pirtle ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Phase Slip ◽  
Density Waves ◽  
Scaling Relationship

Unconventional spin density waves in quasi-one dimensional systems

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-239-Pr10-241
Author(s):  
B. Dóra ◽  
A. Virosztek
Keyword(s):  
Spin Density ◽  
Density Waves ◽  
Spin Density Waves ◽  
One Dimensional

Transversely driven charge density waves in NbSe3

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-65-Pr10-67
Author(s):  
N. Markovic ◽  
M. A.H. Dohmen ◽  
H. S.J. van der Zant
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves
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