对称陀螺分子摆动态的量子关联和量子相干性

报告题目：对称陀螺分子摆动态的量子关联和量子相干性

报告人： 刘金明 研究员（华东师范大学精密光谱科学与技术国家重点实验室）

报告时间：2018年7月27日下午4点到5点

报告地点：物理科技楼418室

报告摘要：Quantum correlation and quantum coherence are two important physical resource in quantum information processing. In this report, we consider two ultracold polar symmetric top molecules coupled by dipole-dipole interaction in an external electric field with appreciable intensity gradient, serving as the physical carrier of quantum information. Each molecule is induced to undergo pendular oscillations under the strong static electric field. Based on the pendular states of polar symmetric top molecules as candidate qubits, we investigate the bipartite quantum correlations of the two polar molecular system for the thermal equilibrium states and analyze the corresponding quantum coherence. Furthermore, we also examine the dynamics of the entanglement and coherence of the system in the presence of intrinsic decoherence, and explore the relations of their temporal evolution with various physical system parameters for two different initial Bell states. We find that quantum correlations and coherence of the two polar molecules in pendular states can be manipulated by adjusting appropriate reduced variables including external electric field, dipole-dipole interaction, ambient temperature and decoherence factor. Our results could be used for molecular quantum computing based on rotational states.

报告人简介：华东师范大学精密光谱科学与技术国家重点实验室研究员，主要从事量子光学与量子信息领域的理论研究。