【大学频道】北京大学量子材料科学中心呈献 | 普林斯顿大学张骏祎

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图 | 张骏祎

题   目：Dipolar Dimer Liquid报告人：张骏祎单   位：Princeton University时   间：2019-05-31地   点：北京大学

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报告摘要

Water is believed to be an essential element for the lives on the Earth. It is a simple molecule consisting of two hydrogen and one oxygen atoms, whereas it supports the chemical reactions in various biological processes. Among many open problems, a particularly interesting one is to understand what is role of water to help the protein folding. We try to reveal some nature of the water by using a much simplified model — Dipolar Dimer Liquid (DDL). Particularly, we consider the DDL on a two-dimensional lattice. We found there exists a partially ordered phase (which we called glacia phase) in the low temperature and high density regime. The phase transition may be understood by mapping it to an annealed Ising model on random graphs. The critical temperature is bounded by exactly solvable Ising models. As an application, we further considered polymers in the DDL. In the low temperature and high density limit, the configurational entropy of the DDL may also be exactly calculated, which quantifies the entropic nature of the hydrophobic effect. We found a scaling law of the entropy, which implies the non-trivial role of the water in the protein folding problem.

个人简介

Junyi Zhang was graduated in 2013 and got his Master degree and Diplôme de l’ENS in 2015. He is now PhD candidate at Princeton University. He is mainly interested in the condensed matter physics. He is currently working on the geometric theory of quantum Hall physics. He has widely spanning research interests from cold atom quantum simulator to electronic processes in biochemical reactions.—— ——往期精彩回顾—— ——● 北京大学量子材料科学中心呈献 | 东京大学龚宗平博士：Topological phases of non-Hermitian systems● 北京大学量子材料科学中心呈献 | Yonglong Xie of Princeton University: Visualizing topological and correlated phases with a scanning tunneling microscope● 北京大学量子材料科学中心呈献 | 犹他大学黄华卿研究员：Theoretically Tracing Topological States: from crystals to quasicrystals and to noncrystalline systems● 北京大学量子材料科学中心呈献 | Hengyun Zhou of Harvard University：Surpassing the Interaction Limit to Quantum Metrology with Fault-Tolerant Control● 北京大学量子材料科学中心呈献 | Gang Cao：Control of Quantum States in 4d/5d Transition Metal Oxides● 北京大学量子材料科学中心呈献 | Patrick Rinke：The Artist: Artificial Intelligence for Spectroscopy
● 北京大学量子材料科学中心呈献 | 佛罗里达大学张晓光教授：Multi-phonon processes in solids from first-principles● 北京大学量子材料科学中心呈献 | 中国科学技术大学翟晓芳研究员：Complex oxide thin films and heterostructures for novel physics and applications● 北京大学量子材料科学中心呈献 | Michael S. Fuhrer：Topological materials for low-energy electronics● 北京大学量子材料科学中心呈献 | 李卫东：Geometric property of Quantum States and its application on Entanglement Criteria

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