Density wave theory or the Lin–Shu density wave theory is a theory proposed by C.C. Lin and Frank Shu in the mid-1960s to explain the spiral arm structure...

main theories have been proposed to explain the origin of spiral arms: the stochastic self-propagating star formation model and the density wave theory. These...

Density functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate...

theoretical physics, the pilot wave theory, also known as Bohmian mechanics, was the first known example of a hidden-variable theory, presented by Louis de Broglie...

extension of density-functional theory (DFT), and the conceptual and computational foundations are analogous – to show that the (time-dependent) wave function...

dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface...

Conversely, the density determines the wave function modulo up to a phase factor, providing the formal foundation of density functional theory. According to...

with coining of the term. According to the density wave theory, the spiral arms are created inside density waves that turn around the galaxy at different...

A charge density wave (CDW) is an ordered quantum fluid of electrons in a linear chain compound or layered crystal. The electrons within a CDW form a standing...

Tollmien–Schlichting wave, in fluid dynamics Wind wave Bloch's theorem Matter wave Pilot wave theory, in Bohmian mechanics Wave function Wave packet Wave–particle...

theories that are invariant under Weyl transformations Density wave theory – A theory in which waves of compressed gas, which move slower than the galaxy...

form, it says that the squared modulus of a wave function that depends upon position is the probability density of measuring a particle as being at a given...

University of California, San Diego. He is best known for proposing the density wave theory to explain the structure of spiral galaxies, and for describing a...

led to a problem with probability density even though it was a relativistic wave equation. The probability density could be negative, which is physically...

effect and the Kerr effect. In refraction, a wave crossing from one medium to another of different density alters its speed and direction upon entering...

regions of enhanced density (density waves) that rotate more slowly than the galaxy's stars and gas. As gas enters a density wave, it gets squeezed and...

Population I stars. A spiral galaxy maintains its spiral arms due to density wave theory. Below is a list of notable spiral galaxies with their own articles...

rule in de Broglie–Bohm theory is not a postulate. Rather, in this theory, the link between the probability density and the wave function has the status...

points, as individual particles rather than waves; the interference pattern appears via the varying density of these particle hits on the screen. Furthermore...

G. Bertin and C. C. Lin (1996). Spiral structure in galaxies: a density wave theory. MIT Press. p. 78. ISBN 978-0-262-02396-2. David J. Darling (2004)...

Matter waves are a central part of the theory of quantum mechanics, being half of wave–particle duality. At all scales where measurements have been practical...

Spin-density wave (SDW) and charge-density wave (CDW) are names for two similar low-energy ordered states of solids. Both these states occur at low temperature...

based on density functional theory (DFT), plane wave basis sets, and pseudopotentials (both norm-conserving and ultrasoft). The core plane wave DFT functions...

In quantum mechanics, a density matrix (or density operator) is a matrix used in calculating the probabilities of the outcomes of measurements performed...

higher along the leading edge of the spiral arms, as predicted by density wave theory. NASA's Galaxy Evolution Explorer project on 16 April 2008 reported...

separate from wave function theory as being formulated in terms of the electronic density alone and as such is viewed as a precursor to modern density functional...

of the way" before the disturbance arrives. In a shock wave the properties of the fluid (density, pressure, temperature, flow velocity, Mach number) change...

propagation velocity of a seismic wave depends on density and elasticity of the medium as well as the type of wave. Velocity tends to increase with depth...

Giuseppe; Lin, Chia-Chiao (1996). Spiral Structure in Galaxies: a Density Wave Theory. MIT Press. ISBN 978-0-262-02396-2. Archived from the original on...

Internal waves are gravity waves that oscillate within a fluid medium, rather than on its surface. To exist, the fluid must be stratified: the density must...