期刊名称：Research Activities on High Performance Computing Clusters at CILEA 2006
出版年度：2006
卷号：0
期号：0
出版社：CILEA
摘要：Due to the small masses of the atoms and the weak interatomic binding, solid 4He is a prototype of what is called a quantum solid, that is a solid in which atoms, due to their zero-point motion, execute very large amplitude vibrations around their lattice sites and explore a sizeable fraction of the primitive cells. This fact opens a scenario in which processes like exchanges between particles or delocalized defects are allowed; such processes could in principle allow one to observe, in a macroscopic domain, phenomena displaying the fundamental laws of Quantum Mechanics which governs the microphysics of the system. By means of a Monte Carlo technique, the Shadow Path Integral Ground State method, which allows one to evaluate exact properties of the T=0K physics of the system, we are studying on the properties on the system when vacancies are present; such point-defects could play a very important role in a probable transition to a "supersolid" phase.
