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Path-integral Monte Carlo simulation of helium at negative pressures

2000; American Physical Society; Volume: 61; Issue: 13 Linguagem: Inglês

10.1103/physrevb.61.9055

1095-3795

Gregory H. Bauer, David M. Ceperley, Nigel Goldenfeld,

High-pressure geophysics and materials

Path-integral Monte Carlo simulations of liquid helium at negative pressure have been carried out for a temperature range from the critical temperature to below the superfluid transition. We have calculated the temperature dependence of the spinodal line as well as the pressure dependence of the isothermal sound velocity in the region of the spinodal. We discuss the slope of the superfluid transition line and the shape of the dispersion curve at negative pressures.