Localized nonlinear waves in combined time-dependent magnetic–optical potentials with spatiotemporally modulated nonlinearities

2013 ◽  
Vol 377 (34-36) ◽  
pp. 2034-2040 ◽  
Author(s):  
Jun-Rong He ◽  
Lin Yi ◽  
Hua-Mei Li
Keyword(s):  
Nonlinear Waves ◽  
Time Dependent ◽  
Optical Potentials

scholarly journals A Realization of a Quasi-Random Walk for Atoms in Time-Dependent Optical Potentials

Atoms ◽  
2015 ◽  
Vol 3 (3) ◽  
pp. 433-449 ◽  
Author(s):  
Torsten Hinkel ◽  
Helmut Ritsch ◽  
Claudiu Genes
Keyword(s):  
Random Walk ◽  
Time Dependent ◽  
Optical Potentials

Optical potentials in time dependent quantum systems: evaluation ofQ space probabilities

1990 ◽  
Vol 15 (2) ◽  
pp. 141-144 ◽  
Author(s):  
H. J. L�dde ◽  
A. Henne ◽  
R. M. Dreizler
Keyword(s):  
Quantum Systems ◽  
Time Dependent ◽  
Optical Potentials

scholarly journals Time-dependent Plume Front Positioning and Its Dynamics Coupled With Seasonal River Efflux

2021 ◽  
Author(s):  
G. Seena ◽  
K. R. Muraleedharan ◽  
C. Revichandran ◽  
S. Abdul Azeez ◽  
Sebin John ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Nonlinear Waves ◽  
Ocean Model ◽  
Time Dependent ◽  
Linear Wave ◽  
Plume Front ◽  
Linear Wave Propagation ◽  
Mixing Dynamics ◽  
South West Coast ◽  
Frontal Zones

Abstract The time-dependent plume front fluctuation concerning different tidal phases and its dynamics coupled with seasonal river efflux in the shelf off Kochi, south west coast of India, were investigated using Finite Volume Community Ocean Model (FVCOM). The region is linked with a monsoonal estuary, featured by mixed semi-diurnal tide (1 m) and exhibited a highly complicated plume pattern. The rivalry between river efflux with tidal phases create plume fronts in the shelf, whose gradients fortified or weakened by mixing dynamics. Eventhough the incessant river efflux in the summer monsoon impart significant momentum in the shelf, the range of frontal fluctuation was curtailed to 2 km by strong monsoon currents. During transient phase of the season (fall inter-monsoon), the tidal forcings on plume positioning overwhelm the shelf currents, such that the plume front fluctuate between 6-17 km (range increased to ~11 km) from the inlet. In low tides, the region near to the inlets was almost homogenized (Rd<1). While, it gets more stratified in high tides due to the transport of high saline ambient water towards the inlet and also by the decreasing kinetic energy (Rd>1). The location of frontal zones suitable for the propagation of nonlinear waves (F≤1)will change in respect to the competition between river efflux and tide-topography interaction. The strong stratified plume front regions with increased Brunt Vaisala Frequency (BVF) in summer monsoon behave as active zones of non linear wave propagation only when the plume front decelerates from supercritical to subcritical. During dry season, the F≤1 was satisfied at limited locations, but the absence of BVFmax zone (frequency >0.3 s-1) revealed that the amplitude of such nonlinear waves would be considerably small. The study divulge that tidally pulsating plume front fluctuates between 3-18 km from inlet and also highlights that the propagation of nonlinear waves with considerable amplitude will depend on both the plume front velocity and the Brunt Vaisala Frequency of the water column.

Optical potentials in time‐dependent quantum theory

1973 ◽  
Vol 59 (1) ◽  
pp. 200-205 ◽  
Author(s):  
R. A. White ◽  
A. Altenberger‐Siczek ◽  
J. C. Light
Keyword(s):  
Quantum Theory ◽  
Time Dependent ◽  
Optical Potentials

Time-dependent optical potentials: non-Markovian and doorway approaches

1993 ◽  
Vol 26 (16) ◽  
pp. 2667-2683 ◽  
Author(s):  
H J Ludde ◽  
A Henne ◽  
A Salin ◽  
A Toepfer ◽  
R M Dreizler
Keyword(s):  
Time Dependent ◽  
Optical Potentials

scholarly journals Comparing the Ratchet Effects of Cold Atoms in Periodically Symmetric and Asymmetric Optical Potentials

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Nkongho Ayuketang Arreyndip ◽  
Kenfack Anatole
Keyword(s):  
Phase Space ◽  
Floquet Theory ◽  
Cold Atoms ◽  
Chaotic Behaviour ◽  
Time Dependent ◽  
Ratchet Effect ◽  
Optical Potentials ◽  
Asymmetric Case ◽  
Ac Fields ◽  
Time Periodic

We consider a particle in a spatial symmetric/asymmetric potential driven by time periodic bichromatic AC fields of ratchet type. The associated time-dependent Schrödinger equation is conveniently tackled with the Floquet theory. We next proceed to investigate the ratchet effect induced by the driver, comparing the symmetric with the asymmetric cases. It turns out that the current in the asymmetric case is stronger than that of the symmetric one. Besides, we also investigate the case where the driver is a delta kicked acting on our spatial potential with more emphasis on its chaotic behaviour. Here we check that the current emerges as the phase space is mixed and that the system with asymmetric spatial potential becomes more chaotic than the symmetric one at low kicking strength.

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