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Variational Schrödinger Momentum Diffusion
CoRRThe momentum Schrödinger Bridge (mSB) has emerged as a leading method for accelerating generative diffusion processes and reducing transport costs. However, the lack of simulation-free properties inevitably results in high training costs and affects scalability.
Kevin Rojas +4 more
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Momentum Effects in Reaction-Diffusion Systems
The Journal of Physical Chemistry, 1994The standard formulation of reaction-diffusion equations assumes that the reacting particles undergo Brownian motion. We generalize the consequent formalism by incorporating a rudimentary model of momentum effects, based on a persistent random-walk model.
Baruch Vilensky +3 more
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Diffusion-of Momentum by Air Currents
Nature, 1925THERE is a wide difference between the actual rate at which contiguous streams intermix and that indicated by the ordinary theory of stream-lines supplemented by corrections for the effect of viscosity. In this theory, for non-viscous fluids, the total energy of every element is identical and constant, and the boundary conditions and those of ...
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On the eddy diffusivities for momentum and heat
Applied Scientific Research, 1959From a simple consideration, the eddy diffusivities for momentum and heat are shown to be equal in terms of statistical properties of turbulence. A universal semi-empirical expression for the eddy diffusivities in a turbulent shear flow is obtained in terms of the distance from the solid boundary and flow properties.
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Quantum Enhancement of Momentum Diffusion in the Delta-Kicked Rotor
Physical Review Letters, 2001Physical Review ...
M B, d'Arcy +4 more
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Physical Review E, 2019
The energy diffusion in one-dimensional (1D) momentum conserving nonlinear lattices usually exhibits anomalous superdiffusion, except the coupled rotator lattice with symmetric and periodic interacting potential which has normal energy diffusion corresponding to normal heat conduction. For nonperiodic 1D lattices with momentum conservation, it has been
Wenshan Liao, Nianbei Li
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The energy diffusion in one-dimensional (1D) momentum conserving nonlinear lattices usually exhibits anomalous superdiffusion, except the coupled rotator lattice with symmetric and periodic interacting potential which has normal energy diffusion corresponding to normal heat conduction. For nonperiodic 1D lattices with momentum conservation, it has been
Wenshan Liao, Nianbei Li
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Self-similar “diffusion” of momentum in an ideal fluid
Fluid Dynamics, 1990It is proposed to consider plane or axisymmetric incompressible flows when at a certain point in space a finite source of momentum is instantaneously created. This type of flow is characterized by the continuous setting in motion of new volumes of fluid with a simultaneous decrease in velocity.
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Thermal and momentum diffusivity measurements in a turbulent stratified flow
10th Aerospace Sciences Meeting, 1972The effect of stratificatio n on mixing coefficients is examined using measurements of velocity and temperature across the interface between a layer of warm water flowing over a pool of colder water in a channel. Velocity profiles were obtained by generating local changes in pH to produce colored tracers that are neutrally buoyant at all points in the ...
GORDON MERRITT, GEORGE RUDINGER
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Semiclassical calculation of the diffusion constant for the Λ system momentum
Physical Review A, 1995We present a one-dimensional, semiclassical calculation of the momentum diffusion constant for a stationary \ensuremath{\Lambda} atom. We show that if the difference detuning between the driving fields is zero, the diffusion vanishes, and we interpret this behavior in terms of the atom-field eigenstates.
, Chu +4 more
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Turbulent Diffusion of Heat and Momentum in the Ocean
1975Publisher Summary Radiation from the sun is absorbed in the upper surface of the oceans, changing the density of the nearby water and air in such a way that atmospheric turbulence is generated and oceanic turbulence is suppressed. This chapter discusses the development of reliable instruments and techniques for turbulence measurements at sea ...
Carl H. Gibson +2 more
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