Sizable quantum effects are observed in the cas of liquid Neon near its triple point. FBSD simulations were performed at 29.9 K with a density of 0.03755 A-3. Interactions between neon atoms are described y a Lennard-Jones potential.
At this temperature the kinetic energy of the fluid system is about 25% higher compared to the value predicted by a classical simulation. Also, the magnitude of the imaginary part of the correlation function reaches a height equal to about 40% of the initial value of the real part, indicating a significant quantum character at this state point. The correlation function decays faster than that in a classical system. When the diffusion process is viewed as a sequence of two-body collisions, this observed faster decay can be explained by a larger effective cross section in the quantum system, an effect attributable to quantum dispersion.