讲座题目：Quantum computing and precision measurement in cold atom traps
主讲人：Dr. Tian Xia
主持人：武海斌 教授
讲座时间： 2016.9.27 上午10：00
讲座地点： 理科大楼A814室
报告人简介：
夏添，于2004年在清华大学获得本科学位，2010年在普林斯顿大学获得博士学位，2010-2015年在美国威斯康星大学麦迪逊分校做博士后。2015.8-至今在中国科学技术大学微尺度物质科学国家实验室副研究员。博士期间的研究领域为：用光抽运的方法实现原子自旋的磁极化；博士后的主要研究为量子计算，目前在中科大主要研究通过对原子固有电偶极矩的测量来检测基本作用中对称性的破缺来寻找标准模型之外的新物理以及原子物理为平台的精密测量。
报告摘要：
Part I: In University of Wisconsin-Madison, We have developed a 2D array of optically trapped single atom qubits for quantum computation experiments. We characterize single qubit Clifford gate operations with randomized benchmarking achieving global and site selected gates with fidelities close to fault tolerance thresholds for quantum computation. A two-qubit Rydberg blockade interaction provides a CNOT gate which is used to create entangled Bell pairs. The fidelity is characterized with parity oscillation measurements.
Part II: A permanent electric dipole moment (EDM) of an atom signifies the violation of both parity (P) and time-reversal (T) symmetries. Measurements of atomic EDM open a promising avenue towards new physics beyond the Standard Model. 225Ra is an ideal case due to a strong nuclear octupole deformation, making its atomic EDM more sensitive to T-violating effects. 225Ra is radioactive with a half-life of 15 days. 171Yb is a stable isotope with atomic properties and transitions similar to those of 225Ra. It is particularly useful as a proxy for testing various measurement schemes and investigates systematic errors. We propose to construct a cold Yb trap system for EDM measurement.