Quantum Optics in Cavity QD

本工作的目的是研究具有两种偏振模式的腔QED。实验探索了对系统基态量子拍子的量子反馈。这些拍子起源于长寿命的基态量子相干，只存在于非驱动模式的自关联中。基态叠加将通过条件测量和外场来操纵和控制，这些外场屏蔽了相干并通过概率纠错协议纠正了量子误差。利用外差技术研究强驱动场下原子的极化将显示原子的饱和，尽管原子具有多能级结构。更广泛的影响：该项目支持原子、分子和光学物理领域的两名研究生。学生们将每年多次参加由物理系本科生办公室组织的实验室开放参观活动，以及帮助夏日女孩项目。预计这些学生将参加NIST和UMD每周举行的联合量子研讨会，超过一半的演讲者来自AMO社区，所有人都对与量子相干相关的问题感兴趣。将有本科生参与研究工作，两名墨西哥本科生将在实验室呆十周。关于该小组进展情况的报告将刊登在联合质量倡议的网页上以及该小组的网站上，并有面向普通公众的解释。

The goal of this work is to investigate cavity QED with two polarization modes. The experiments explore quantum feedback on the ground state quantum beats of the system. Those beats, originating on long-lived ground state quantum coherences, are only present in the autocorrelation of the un-driven mode. The ground state superposition will be manipulated and controlled through conditional measurements and external fields, which shield the coherence and correct quantum errors through probabilistic error correction protocols. Investigations of the atomic polarization under strong driving fields will show the saturation of the atom, despite its multilevel structure, using heterodyne techniques. Broader impacts: The project supports two graduate students in the area of Atomic, Molecular, and Optical Physics. The students will participate in the open houses of the laboratory that are organized by the undergraduate office of the Physics Department many times per year, as well as help with the Summer Girls Progam. The students are expected to attend the weekly Joint Quantum Seminar between NIST and UMD, where more than half of the speakers come from the AMO community and all are interested in questions related to quantum coherence. There will be undergraduates participating in the research effort and two Mexican undergraduates will spend ten weeks in the laboratory. Reports on the progress of the group will be available on the web page of the JQI as well as on the group's web site, with explanations geared to the general public.