9 research outputs found

    Monte Carlo Calculations for Liquid 4^4He at Negative Pressure

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    A Quadratic Diffusion Monte Carlo method has been used to obtain the equation of state of liquid 4^4He including the negative pressure region down to the spinodal point. The atomic interaction used is a renewed version (HFD-B(HE)) of the Aziz potential, which reproduces quite accurately the features of the experimental equation of state. The spinodal pressure has been calculated and the behavior of the sound velociy around the spinodal density has been analyzed.Comment: 10 pages, RevTex 3.0, with 4 PostScript figures include

    Acoustic Cavitation Thresholds of Ocean Water

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    Thermal nucleation of cavities in liquid helium at negative pressures

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    We have investigated the nucleation rate at which cavities are formed in 4He and 3He at negative pressures due to thermal fluctuations. To this end, we have used a density functional that reproduces the He liquid-gas interface along the coexistence line. The inclusion of thermal effects in the calculation of the barrier against nucleation results in a sizable decrease of the absolute value of the tensile strength above 1.5 K
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