Density correlation function in superfluid helium nearT λ
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The previously calculated hydrodynamic form of the density correlation function of liquid helium is written out explicitly forT nearTλ. This function, which is proportional to the intensity of light scattered from the fluid, has a finite value at ω=0, which grows asT→Tλ from below. In evaluating the precise form of this contribution in terms of transport coefficients, it is important to keep terms of order (C p /C v )−1.
KeywordsHelium Correlation Function Magnetic Material Precise Form Liquid Helium
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