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searching for Group velocity 76 found (209 total)

Rossby-gravity waves (841 words) [view diff] exact match in snippet view article find links to article

wave (hence the term Rossby-gravity waves). As mentioned earlier, the group velocity (or energy packet/dispersion) is always directed toward the east with

Galaxy And Mass Assembly survey (312 words) [view diff] exact match in snippet view article find links to article

of the dark matter halo mass function of groups and clusters using group velocity dispersion measurements. A comprehensive determination of the galaxy

Bandwidth-limited pulse (261 words) [view diff] exact match in snippet view article find links to article

through a block of glass, the glass medium broadens the pulse due to group velocity dispersion. Keeping pulses bandwidth-limited is necessary to compress

Time stretch dispersive Fourier transform (1,000 words) [view diff] no match in snippet view article find links to article

wavelengths and analyze the optical spectrum in real-time. It employs group-velocity dispersion (GVD) to transform the spectrum of a broadband optical pulse

Equatorial Rossby wave (820 words) [view diff] exact match in snippet view article find links to article

west. For very short waves (as the zonal wavenumber increases), the group velocity (energy packet) is eastward and opposite to the phase speed, both of

Sverdrup wave (609 words) [view diff] exact match in snippet view article find links to article

be noted as c = ( g H ) 1 / 2 {\displaystyle c=(gH)^{1/2}} and the group velocity (cg) of shallow water gravity wave can be noted as c g = ( g H ) 1 /

Klein paradox (1,062 words) [view diff] exact match in snippet view article find links to article

associated with positive group velocity (Blue lines in Fig.1), whereas the reflected wave function is associated with negative group velocity. (Green lines in

Zeta Herculis Moving Group (358 words) [view diff] exact match in snippet view article find links to article

Persei, η Reticuli, φ1 Lupi, ζ Herculis and ε Octantis. He estimated the group velocity at 74.5 km/s. In 1970, Richard Woolley refined the list to ten stars

Vector soliton (3,052 words) [view diff] exact match in snippet view article find links to article

between these two polarization modes, they could still adjust their group velocity and be trapped together. Vector solitons can be spatial or temporal

Ultrashort pulse (3,343 words) [view diff] exact match in snippet view article find links to article

_{1}} is the inverse of the group velocity projection. The term in β 2 {\displaystyle \beta _{2}} is the group velocity dispersion (GVD) or second-order

Chromo-modal dispersion (279 words) [view diff] exact match in snippet view article find links to article

Modal dispersion during propagation in the waveguide then provides group velocity dispersion to the signal. The large modal dispersion inherent to multimode

Hyades (star cluster) (3,964 words) [view diff] exact match in snippet view article

A 2018 Gaia DR1 study of the Hyades Cluster determined a (U, V, W) group velocity of (−41.92 ± 0.16, −19.35 ± 0.13, −1.11 ± 0.11) km/sec, based on the

Equatorial wave (2,494 words) [view diff] exact match in snippet view article find links to article

of roots correspond to the Yanai or mixed Rossby-gravity mode whose group velocity is always to the east and interpolates between two types of n > 0 {\displaystyle

Hartman effect (1,892 words) [view diff] exact match in snippet view article find links to article

another confirmation of the Hartman effect. The inferred tunneling group velocity was faster than that of a reference pulse propagating in a fiber without

Cross-polarized wave generation (1,234 words) [view diff] exact match in snippet view article find links to article

equal:VXPW=VFW and Vgr,XPW=Vgr,FW. Consequence of that is ideal phase and group velocity matching for the two waves propagating along the crystal. This property

GRENOUILLE (1,203 words) [view diff] no match in snippet view article find links to article

In a normal second harmonic generation, the goal is to minimize the group-velocity mismatch (GVM) in order to maximize phase-matching bandwidth. This is

Supercontinuum (6,995 words) [view diff] exact match in snippet view article find links to article

a paper modelling the formation of supercontinua (in the anomalous group velocity dispersion region) when generated by femtosecond pulses in fibre. It

White light scanner (1,201 words) [view diff] no match in snippet view article find links to article

corresponds to the relative change in group-velocity optical path difference DG by Dh = DG/2nG where nG is group-velocity index of refraction. If this calculation

Liquid-crystal laser (2,028 words) [view diff] exact match in snippet view article find links to article

(reflection notch) corresponding to forbidden frequencies. The lower photon group velocity and higher density of states near the photonic bandgap suppresses spontaneous

Thermal conductivity and resistivity (8,353 words) [view diff] exact match in snippet view article find links to article

length for processes without directional correlation. If Vg is the group velocity of a phonon wave packet, then the relaxation length l {\displaystyle

Brillouin zone (639 words) [view diff] case mismatch in snippet view article find links to article

pair of periods Fundamental domain "Topic 5-2: Nyquist Frequency and Group Velocity" (PDF). Solid State Physics in a Nutshell. Colorado School of Mines

Anatoly Sukhorukov (1,817 words) [view diff] exact match in snippet view article find links to article

beams and pulses under the presence of phase- and group-velocity mismatches, diffraction, and group velocity dispersion. He has developed a spatio-temporal

Phase shift module (668 words) [view diff] exact match in snippet view article find links to article

high-voltage electrostatic [mA, V] DC power consumption [mW] Distortion: group velocity dispersion (GVD) [ps2/nm] Gain [dB] if active, loss [dB] if passive

Alfvén wave (4,477 words) [view diff] exact match in snippet view article find links to article

v_{A}\equiv {\frac {B}{\sqrt {\mu _{0}\,\rho }}}} is the Alfvén wave group velocity. (The formula for the phase velocity assumes that the plasma particles

Polytetrafluoroethylene (5,811 words) [view diff] exact match in snippet view article find links to article

fact that PTFE has excellent dielectric properties, specifically low group velocity dispersion, especially at high radio frequencies, making it suitable

Richard Fork (644 words) [view diff] no match in snippet view article find links to article

O.E. Martinez and J.P. Gordon, published a paper entitled "Negative group-velocity dispersion using refraction" in the Journal of the Optical Society of

Seven Seas (song) (528 words) [view diff] case mismatch in snippet view article

with the song "Angels and Devils" on the b-side. American indie rock group Velocity Girl released a cover version of "Seven Seas" as a single on Heaven

Dielectric (4,758 words) [view diff] exact match in snippet view article find links to article

Examples of phenomena that can be so modelled include: Refractive index Group velocity dispersion Birefringence Self-focusing Harmonic generation Dipolar polarisation

Surface wave inversion (3,253 words) [view diff] exact match in snippet view article find links to article

within the group because each wavelet travels at a different speed. A group velocity is basically the speed at which a wave group travels. A phase velocity

Slowly varying envelope approximation (1,019 words) [view diff] exact match in snippet view article find links to article

\ell _{\mathsf {p}}} is the pulse width and v {\displaystyle v} is the group velocity of the radiating system. These conditions are much less restrictive

Low-dispersion glass (958 words) [view diff] exact match in snippet view article find links to article

of light, in e.g. mode-locked lasers, to prevent pulse broadening by group velocity dispersion in the optical elements. Infrared corrected special-low-dispersion

Quantum tunnelling (6,261 words) [view diff] exact match in snippet view article find links to article

non-local propagation have been misinterpreted. In particular, the group velocity of a wave packet does not measure its speed, but is related to the amount

Magnetohydrodynamics (5,241 words) [view diff] exact match in snippet view article find links to article

Mode Type Limiting phase speeds Group velocity Direction of energy flow k ∥ B {\displaystyle \mathbf {k} \parallel \mathbf {B} } k ⊥ B {\displaystyle \mathbf

Numerical dispersion (215 words) [view diff] case mismatch in snippet view article find links to article

"lecture10.dvi" (PDF). Retrieved 2021-02-16. CHAPTER 5: Dissipation, Dispersion, and Group Velocity TREFETHEN "Numerical Dispersion". ccrma.stanford.edu. v t e

Cale Gale (1,773 words) [view diff] case mismatch in snippet view article find links to article

for different teams. He owns the shock manufacturer and consultant group Velocity Racing Suspensions. Gale also races super late models in the southeast

Herman March (264 words) [view diff] case mismatch in snippet view article find links to article

Fredrick Wood, University of Wisconsin–Madison, 1923 Dissertation: Group Velocity and the Propagation of Disturbances in Dispersive Media. Advisor: Herman

Birefringence (6,582 words) [view diff] exact match in snippet view article find links to article

distinct axes known as optical ray axes or biradials along which the group velocity of the light is independent of polarization. When an arbitrary beam

Shyam Sundar Rai (1,192 words) [view diff] exact match in snippet view article find links to article

V. K.; Rai, S. S.; Haines, J. (2006). "Variation of rayleigh wave group velocity dispersion and seismic heterogeneity of the Indian crust and uppermost

Education and training of electrical and electronics engineers (1,212 words) [view diff] exact match in snippet view article find links to article

propagation through various media; reflection and refraction; phase and group velocity; skin depth. Transmission lines: characteristic impedance; impedance

Breaking wave (1,280 words) [view diff] exact match in snippet view article find links to article

heights are amplified in the region of shallower water (because the group velocity is lower there). See also waves and shallow water. There are four basic

Léon Brillouin (1,418 words) [view diff] case mismatch in snippet view article find links to article

Vie Matière et Observation (Albin Michel, 1959) Wave Propagation and Group Velocity (Academic Press, 1960) Science and Information Theory (Academic Press

Robert W. Boyd (2,776 words) [view diff] exact match in snippet view article find links to article

such as atomic vapors and Bose-Einstein condensates to control the group velocity of light. The realization that slow light effects can be obtained in

Gaussian beam (6,838 words) [view diff] exact match in snippet view article find links to article

E.; Sprangle, P.; Pilloff, M.; Krall, J. (1995-09-01). "Theory and group velocity of ultrashort, tightly focused laser pulses". JOSA B. 12 (9): 1695–1703

Chirped mirror (1,204 words) [view diff] exact match in snippet view article find links to article

single mirror can compensate 4 μm optical path length. Considering the group velocity this is enough for the 3 m air inside the cavity, for the 3 mm of Ti:sapphire

Axicon (948 words) [view diff] exact match in snippet view article find links to article

transmission improves the damage threshold, chromatic aberration, and group velocity dispersion compared to conventional axicons. In research at

McCumber relation (2,105 words) [view diff] exact match in snippet view article find links to article

the thermal state. Let v ( ω ) {\displaystyle ~v(\omega )~} be group velocity of light in the medium, the product n 2 σ e ( ω ) v ( ω ) D ( ω )

Ship resistance and propulsion (894 words) [view diff] exact match in snippet view article find links to article

transverse wave system travels at one half the phase velocity or the group velocity of the waves. The prime mover of the vessel must put additional energy

Lithium aluminium germanium phosphate (4,894 words) [view diff] exact match in snippet view article find links to article

Cv is the heat capacity per unit volume, vph is the average phonon group velocity, lph is the phonon mean free path, ρ {\displaystyle \rho } is the density

Fermi's golden rule (3,906 words) [view diff] exact match in snippet view article find links to article

f_{i}({\textbf {k}})-f_{f}({\textbf {k}})} are the difference of the group velocity and Fermi-Dirac distribution between possible the initial and final

Heaviside condition (1,802 words) [view diff] exact match in snippet view article find links to article

combination of reactive and resistive elements would yield a constant group velocity. The transmission function of a transmission line is defined in terms

Atmospheric tide (3,206 words) [view diff] exact match in snippet view article find links to article

solutions ( α n 2 > 0 ) {\displaystyle (\alpha _{n}^{2}>0)} , the vertical group velocity c g z , n = H ∂ σ ∂ α n {\displaystyle c_{gz,n}=H{\frac {\partial \sigma

Lieb–Robinson bounds (4,668 words) [view diff] exact match in snippet view article find links to article

as a fixed constant.) The constant v {\displaystyle v} is called the group velocity or Lieb–Robinson velocity. The bound (1) is presented slightly differently

Dyakonov surface wave (1,561 words) [view diff] exact match in snippet view article find links to article

(rutile) and Δθph ≈ 4° (calomel). However the physically more important group velocity interval is substantially larger (proportional to η). Calculations give

Herbert Winful (1,329 words) [view diff] no match in snippet view article find links to article

Mode Locking with an Active Nonlinear Directional Coupler: Positive Group-Velocity Dispersion", Optics Letters, 18, 720–722 (1 May 1993). (With S. Feng

Carbon nanotube nanomotor (4,107 words) [view diff] exact match in snippet view article find links to article

particular phonon frequencies of the outer tube which happen to possess a group velocity approximately equal to the sliding velocity. The first nanomotor can

Abdul Jabbar Abdullah (977 words) [view diff] no match in snippet view article find links to article

Dynamics of Hurricanes. New York University, 1953. Abdul Jabbar Abdullah. Group-velocity of Atmospheric Waves. Massachusetts Institute of Technology, 1946. National

Serial time-encoded amplified microscopy (2,695 words) [view diff] no match in snippet view article find links to article

process in which the spectrum of an optical pulse is mapped by large group-velocity dispersion into a slowed-down temporal waveform and amplified simultaneously

Vincent Mai (1,548 words) [view diff] no match in snippet view article find links to article

NorthStar Anesthesia, Outpatient Imaging Affiliates, Engineered Stone Group, Velocity Vehicle Group, Crossroads Equipment Lease and Finance, System Pavers

Lorentz-violating electrodynamics (4,569 words) [view diff] exact match in snippet view article find links to article

vL/c^{2}} , where Δ v {\displaystyle \Delta v} is the difference in the group velocity and L {\displaystyle L} is the distance traveled. Sensitivity to Lorentz

Acoustic metamaterial (5,805 words) [view diff] exact match in snippet view article find links to article

reciprocal of the bulk modulus decrease in magnitude fast enough for the group velocity to become negative (double negativity). This gives rise to the desired

Harry Friedmann (789 words) [view diff] exact match in snippet view article find links to article

D.; Wilson-Gordon, A. D.; Friedmann, H. (2001). "Phase control of group velocity: From subluminal to superluminal light propagation". Physical Review

Ice mélange (1,282 words) [view diff] exact match in snippet view article find links to article

internal seiches and introduces band gaps where energy propagation (group velocity) vanishes. If energy is introduced into the fjord within the period

Carrier scattering (3,188 words) [view diff] exact match in snippet view article find links to article

phonon angular frequency ωq=cq, volume V, solid density ρ, and phonon group velocity c. Plugging this into Eq. 6 gives S k ′ k A c = 2 π ℏ Z D P 2 ℏ ω q

Metamaterial antenna (8,656 words) [view diff] case mismatch in snippet view article find links to article

Eleftheriades (2003-10-14). "Periodically LTL With Effective NRI and Negative Group Velocity". IEEE Transactions on Antennas and Propagation. 51 (10): 2619–2625

Charles D. Brown II (1,102 words) [view diff] case mismatch in snippet view article find links to article

Unnikrishnan, Govind; Stamper-Kurn, Dan (2020-09-21). "Interaction-Enhanced Group Velocity of Bosons in the Flat Band of an Optical Kagome Lattice". Physical Review

Anamorphic stretch transform (2,107 words) [view diff] exact match in snippet view article find links to article

portions of the data are dilated in a process that emulates the effect of group velocity dispersion on temporal signals. With this coding operation, the data

Gross–Pitaevskii equation (4,518 words) [view diff] exact match in snippet view article find links to article

atomic ensemble moves coherently along z {\displaystyle z} axis with group velocity whose direction is defined by signs of topological charge ℓ {\displaystyle

Stefan Ettlinger (1,508 words) [view diff] case mismatch in snippet view article find links to article

music performance, let the artist club paintbox, Düsseldorf. 2011 " Group Velocity", Märkisches Museum, Witten 2011 " Captain Pamphile ," collection Falkenberg

Internal wave breaking (2,853 words) [view diff] exact match in snippet view article find links to article

however, waves will be reflected upward with reduced wavelength and lower group velocity. Because the energy flux is conserved during reflection, energy density

Quantum optical coherence tomography (1,395 words) [view diff] no match in snippet view article find links to article

the photon entanglement. Q-OCT permits a direct determination of the group-velocity dispersion (GVD) coefficients of the media. The development of quantum-mimetic

Camille Gutton (2,027 words) [view diff] exact match in snippet view article find links to article

two conductors, showing a slight difference between the phase and the group velocity. He defended his thesis on "Experimental research on the passage of

Nanophotonic resonator (2,798 words) [view diff] exact match in snippet view article find links to article

{\displaystyle a} is the differential gain, v g {\displaystyle v_{g}} is the group velocity, τ p = Q / ω L {\displaystyle \tau _{p}=Q/\omega _{L}} is the photon

Phonon polariton (2,527 words) [view diff] exact match in snippet view article find links to article

far less than acoustic phonons. This is because of the relatively low group velocity of optical phonons. When the thickness of the material decreases, the

Ginzburg–Landau equation (956 words) [view diff] exact match in snippet view article find links to article

\mathbf {x} -\omega t},\quad \omega =\beta +(\alpha -\beta )k^{2}.} The group velocity of the wave is given by d ω / d k = 2 ( α − β ) k . {\displaystyle d\omega

Alexander Ramm (4,450 words) [view diff] exact match in snippet view article find links to article

or it may have a negative refraction property, which means that the group velocity in this material is directed opposite to the phase velocity. These results

SFX Coaster (1,987 words) [view diff] no match in snippet view article find links to article

Evergrande Group, with track being fabricated by China's Guangdong Qiguang Group. Velocity Magnetics meanwhile, a well known magnetic braking supplier, would