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    Use of Nuclear Spin Impurities to Suppress Electronic Spin Fluctuations and Decoherence in Composite Solid-State Spin Systems
    4.
    发明申请
    Use of Nuclear Spin Impurities to Suppress Electronic Spin Fluctuations and Decoherence in Composite Solid-State Spin Systems 有权
    使用核自旋杂质来抑制复合固态自旋系统中的电子自旋波动和去相干

    公开(公告)号：US20140306707A1

    公开(公告)日：2014-10-16

    申请号：US14361626

    申请日：2012-11-30

    申请人： Ronald L. Walsworth ,  Nir Bar-Gill ,  Chinmay Belthangady ,  Linh My Pham

    发明人： Ronald L. Walsworth ,  Nir Bar-Gill ,  Chinmay Belthangady ,  Linh My Pham

    IPC分类号： G01R33/58 ,  G01R33/60

    CPC分类号： G01R33/58 ,  G01R33/1284 ,  G01R33/24 ,  G01R33/4616 ,  G01R33/60

    摘要： A solid state electronic spin system contains electronic spins disposed within a solid state lattice and coupled to an electronic spin bath and a nuclear spin bath, where the electronic spin bath composed of electronic spin impurities and the nuclear spin bath composed of nuclear spin impurities. The concentration of nuclear spin impurities in the nuclear spin bath is controlled to a value chosen so as to allow the nuclear spin impurities to effect a suppression of spin fluctuations and spin decoherence caused by the electronic spin bath. Sensing devices such as magnetic field detectors can exploit such a spin bath suppression effect, by applying optical radiation to the electronic spins for initialization and readout, and applying RF pulses to dynamically decouple the electronic spins from the electronic spin bath and the nuclear spin bath.

    摘要翻译： 固态电子自旋系统包含设置在固态晶格内的电子自旋，并耦合到电子旋转浴和核旋转浴，其中由电子自旋杂质组成的电子旋转浴和由核旋转杂质组成的核旋转浴。 核旋转浴中核自旋杂质的浓度被控制为选择的值，以便允许核自旋杂质抑制由电子旋转浴引起的自旋波动和自旋去相干。 诸如磁场检测器的感测装置可以通过将光辐射施加到用于初始化和读出的电子自旋中，并且施加RF脉冲以使电子自旋与电子旋转浴和核旋转浴动态解耦，可以利用这种旋转浴抑制效果。

    Spectral Decomposition Of Composite Solid State Spin Environments Through Quantum Control of Spin Impurities
    5.
    发明申请
    Spectral Decomposition Of Composite Solid State Spin Environments Through Quantum Control of Spin Impurities 审中-公开
    通过自旋杂质的量子控制对复合固态旋转环境的光谱分解

    公开(公告)号：US20140191752A1

    公开(公告)日：2014-07-10

    申请号：US14125941

    申请日：2012-06-13

    申请人： Ronald Walsworth ,  Linh My Pham ,  Nir Bar-Gill ,  Chinmay Belthangady

    发明人： Ronald Walsworth ,  Linh My Pham ,  Nir Bar-Gill ,  Chinmay Belthangady

    IPC分类号： G06N99/00

    CPC分类号： G06N99/00 ,  B82Y10/00 ,  G06N10/00

    摘要： Methods and systems are described for spectral decomposition of composite solid-state spin environments through quantum control of electronic spin impurities. Δ sequence of spin-control modulation pulses are applied to the electronic spin impurities in the solid-state spin systems. The spectral content of the spin bath that surrounds the electronic spin impurities within the solid-state spin system is extracted, by measuring the coherent evolution and associated decoherence of the spin impurities as a function of number of the applied modulation pulses, and the time-spacing between the pulses. Using these methods, fundamental properties of the spin environment such as the correlation times and the coupling strengths for both electronic and nuclear spins in the spin bath, can be determined.

    摘要翻译： 描述了通过电子自旋杂质的量子控制对复合固态自旋环境进行光谱分解的方法和系统。 ＆Dgr 自旋控制调制脉冲的顺序被施加到固态自旋系统中的电子自旋杂质。 通过测量作为施加的调制脉冲数的函数的自旋杂质的相干演化和相关的去相干性，提取围绕固态自旋系统内的电子自旋杂质的旋转浴槽的光谱含量， 脉冲之间的间距。 使用这些方法，可以确定自旋环境的基本特性，例如旋转浴中的电子和核自旋的相关时间和耦合强度。

    Two-dimensional magneto-optical trap for neutral atoms
    6.
    发明授权
    Two-dimensional magneto-optical trap for neutral atoms 有权
    用于中性原子的二维磁光阱

    公开(公告)号：US08835833B2

    公开(公告)日：2014-09-16

    申请号：US13598129

    申请日：2012-08-29

    申请人： Shengwang Du ,  Shanchao Zhang ,  Shuyu Zhou ,  Guang Yu Yin ,  Chinmay Belthangady

    发明人： Shengwang Du ,  Shanchao Zhang ,  Shuyu Zhou ,  Guang Yu Yin ,  Chinmay Belthangady

    IPC分类号： H05H3/00 ,  G21K1/00

    CPC分类号： G21K1/006

    摘要： A two-dimensional (2D) magneto-optical trap (MOT) for alkali neutral atoms establishes a zero magnetic field along the longitudinal symmetry axis. Two of three pairs of trapping laser beams do not follow the symmetry axes of the quadruple magnetic field and are aligned with a large non-zero degree angles to the longitudinal axis. In a dark-line 2D MOT configuration, there are two orthogonal repumping beams. In each repumping beam, an opaque line is imaged to the longitudinal axis, and the overlap of these two line images creates a dark line volume in the longitudinal axis where there is no repumping light. The zero magnetic field along the longitudinal axis allows the cold atoms maintain a long ground-state coherence time without switching off the MOT magnetic field, which makes it possible to operate the MOT at a high repetition rate and a high duty cycle.

    摘要翻译： 用于碱性中性原子的二维（2D）磁光阱（MOT）沿纵向对称轴建立零磁场。 三对俘获激光束中的两对不遵循四极磁场的对称轴，并且与纵向轴线以非零度角大的对准。 在暗线2D MOT配置中，有两个正交的重排光束。 在每个排放光束中，不透明线被成像为纵向轴线，并且这两条线图像的重叠在不存在排斥光的纵轴上产生暗线体积。 沿着纵轴的零磁场允许冷原子保持长的基态相干时间，而不关闭MOT磁场，这使得可以以高重复率和高占空比操作MOT。