Apparatus and methods for quantum beam tracking

    公开(公告)号:US11125773B2

    公开(公告)日:2021-09-21

    申请号:US16922158

    申请日:2020-07-07

    发明人: Saikat Guha Haoyu Qi

    IPC分类号: G01Q20/00 G01Q20/02 G01Q60/24

    摘要: A method includes sending a probe beam into a beam path that induces a lateral displacement to the probe beam. The probe beam includes a plurality of orthogonal spatial modes that are entangled with each other. The method also includes measuring a phase of each spatial mode from the plurality of orthogonal spatial modes in the probe beam at a detector disposed within a near field propagation regime of the probe beam. The method also includes estimating the lateral displacement of the probe beam based on a phase of each spatial mode from the plurality of spatial modes in the probe beam after the beam path.