US-Italy Cooperative Research: Simulation Studies of QuantumSystems

该奖项将支持纽约的马尔文·卡洛斯教授 大学与L. Reatto of 米兰大学，意大利。 调查人员 打算继续他们在计算量子领域的研究 固体和液体氦的力学。 我们目前了解的 低密度固体和液体-固体相变的 高度量子化的系统仍然是不完整的。 实验上 从理论上讲，这种转变受到 量子效应 使用变分计算和一个绿色的 函数蒙特卡罗（GFMC）方法，研究人员已经获得 关于液-固相变和基本相变的重要结果 二维液态氦和固态氦的性质， 通过这种合作。 拟议的工作是互补的：美方将作出贡献 计算多体理论的方法论，特别是因为它 适用于量子问题在其基态和有限 温度 意大利方面将致力于理论和 分析结果的基础上获得的数值结果， 美国研究人员。 鉴于这种互补性， 这种合作可能会增进人们对 液体-固体转变和材料的量子效应。

This award will support Professor Malvin Kalos of New York University in a research collaboration with Professor L. Reatto of the Universita degli Studi di Milano, Italy. The investigators intend to continue their studies in the computational quantum mechanics of solid and liquid helium. Our current understanding of low density solid and of the liquid-solid phase transitions of highly quantum systems is still incomplete. Both experimentally and theoretically, such transitions are strongly affected by quantum effects. Using variational calculations and a Green's function Monte Carlo (GFMC) method, the investigators have obtained important results about liquid-solid transitions and about basic properties of two-dimensional liquid and solid helium which will be extended through this collaboration. The proposed work is complementary: the U.S. side will contribute the methodology of computational many-body theory, especially as it applies to quantum problems in their ground states and finite temperature. The Italian side will work on theoretical and analytical results based on the numerical results obtained by the U.S. researchers. Given this degree of complementarity, it is likely that the collaboration will lead to increased understanding of quantum effects of liquid-solid transitions and materials.