TY - JOUR

T1 - On frequency-dependent and time-dependent diffusivities

AU - Halpern, V.

PY - 1992

Y1 - 1992

N2 - The time-dependent diffusivity D(t) is usually defined as the coefficient that appears in the diffusion equation, while the frequency-dependent diffusivity D( omega ) is defined the Fourier transform of the velocity-velocity correlation function. D( omega )/(i omega ), rather than D( omega ), is the Fourier transform of D(t).

AB - The time-dependent diffusivity D(t) is usually defined as the coefficient that appears in the diffusion equation, while the frequency-dependent diffusivity D( omega ) is defined the Fourier transform of the velocity-velocity correlation function. D( omega )/(i omega ), rather than D( omega ), is the Fourier transform of D(t).

UR - http://www.scopus.com/inward/record.url?scp=36149029599&partnerID=8YFLogxK

U2 - 10.1088/0143-0807/13/4/006

DO - 10.1088/0143-0807/13/4/006

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AN - SCOPUS:36149029599

SN - 0143-0807

VL - 13

SP - 184

EP - 185

JO - European Journal of Physics

JF - European Journal of Physics

IS - 4

M1 - 006

ER -