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公开(公告)号：US20200240931A1
公开(公告)日：2020-07-30
申请号：US16751740
申请日：2020-01-24
发明人： Dusan Sarenac , Connor Kapahi , Dmitry A. Pushin , David G. Cory
摘要： In a general aspect, a collimator system is described. In some aspects, a neutron beam collimation method includes receiving a neutron beam from a neutron source; polarizing the neutron beam using a polarizer, and obtaining a collimated neutron beam from the polarized neutron beam. The neutron beam generated by the neutron source has a first beam divergence and includes a plurality of neutrons. The collimated neutron beam has a second beam divergence that is less than the first beam divergence. Obtaining the collimated neutron beam includes mapping transverse momentum of each respective neutron, of the plurality of neutrons, onto a polarization degree of freedom of the respective neutron by applying a sequence of phase shift gradients to the polarized neutron beam, and after applying the sequence of phase shift gradients, passing the polarized neutron beam through an analyzer.
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公开(公告)号：US10371767B2
公开(公告)日：2019-08-06
申请号：US14888169
申请日：2014-01-31
IPC分类号： G01R33/28 , G01N24/08 , G01R33/30 , G01R33/38 , G01R33/44 , G01R33/385 , G01R33/50 , G01R33/56 , G01N24/10 , G01R33/60
摘要： In some aspects, polarization of a spin ensemble can be increased using cavity-based techniques. A cavity is coupled with a spin ensemble, and a drive field generates an interaction between the cavity and the spin ensemble. In some cases, the interaction increases the polarization of the spin ensemble faster than the thermal (T1) relaxation process or any other thermal polarizing process affecting the spin ensemble. In some cases, polarization is increased by iteratively acting on angular momentum subspaces of the spin ensemble, and mixing the angular momentum subspaces, for example, by a dipolar interaction, a transverse (T2) relaxation process, application of a gradient field, or a combination of these and other processes.
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公开(公告)号：US10197641B2
公开(公告)日：2019-02-05
申请号：US14787575
申请日：2014-01-31
IPC分类号： G01R33/28 , G01N24/08 , G01R33/30 , G01R33/38 , G01R33/44 , G01R33/385 , G01R33/50 , G01R33/56 , G01N24/10 , G01R33/60
摘要： In some aspects, polarization of a spin ensemble can be increased using cavity-based techniques. A resonator applies drive field to a spin ensemble in a static magnetic field. The drive field couples the spin ensemble with a cavity, and the coupling increases the polarization of the spin ensemble. In some cases, the cavity is detuned from the spin- resonance frequency, and the Rabi frequency associated with the drive field can be matched to the cavity detuning.
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公开(公告)号：US10184994B2
公开(公告)日：2019-01-22
申请号：US14888180
申请日：2014-01-31
发明人： Grum Teklemariam , David G. Cory
IPC分类号： G01R33/28 , G01N24/08 , G01R33/30 , G01R33/38 , G01R33/44 , G01R33/385 , G01R33/50 , G01R33/56 , G01N24/10 , G01R33/60
摘要： In some aspects, polarization of a spin ensemble can be increased using cavity-based techniques. A magnetic resonance imaging (MRI) system includes a cavity and a resonator. The cavity is adapted to interact with a spin ensemble in an imaging subject in a static magnetic field. The resonator is adapted to generate an interaction between the cavity and the spin ensemble that increases polarization of the spin ensemble. In some implementations, the spin ensemble achieves a polarization that is higher than its thermal equilibrium polarization.
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公开(公告)号：US09792558B2
公开(公告)日：2017-10-17
申请号：US15328769
申请日：2015-09-16
CPC分类号： G06N99/002 , G01R33/326 , G01R33/60
摘要： In some aspects, a mesoscopic system is used to generate entanglement, for example, on a pair of qubits. In some implementations, the mesoscopic system includes a first spin, a second spin and multiple other spins. The initial state of the first and second spins can be separable (non-entangled) states. Measurement outcomes are obtained by performing projective measurements on the mesoscopic system. Based on the measurement outcomes, an entangled state of the first and second spins is detected. The entangled state is transferred from the first and second spins to the first and second qubits.
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公开(公告)号：US20160069966A1
公开(公告)日：2016-03-10
申请号：US14888169
申请日：2014-01-31
CPC分类号： G01R33/282 , G01N24/08 , G01N24/10 , G01R33/30 , G01R33/3804 , G01R33/3856 , G01R33/44 , G01R33/50 , G01R33/56 , G01R33/60
摘要： In some aspects, polarization of a spin ensemble can be increased using cavity-based techniques. A cavity is coupled with a spin ensemble, and a drive field generates an interaction between the cavity and the spin ensemble. In some cases, the interaction increases the polarization of the spin ensemble faster than the thermal (T1) relaxation process or any other thermal polarizing process affecting the spin ensemble. In some cases, polarization is increased by iteratively acting on angular momentum subspaces of the spin ensemble, and mixing the angular momentum subspaces, for example, by a dipolar interaction, a transverse (T2) relaxation process, application of a gradient field, or a combination of these and other processes.
摘要翻译： 在一些方面，使用基于腔的技术可以增加旋转集合的极化。 空腔与旋转组合耦合，并且驱动场产生空腔和旋转组合之间的相互作用。 在某些情况下，交互作用会比热（T1）弛豫过程或任何其他影响旋转集合的热偏振过程更快地增加旋转集合的极化。 在一些情况下，通过迭代地作用于旋转集合的角动量子空间并且例如通过偶极相互作用，横向（T2）松弛过程，梯度场或 这些和其他过程的组合。
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公开(公告)号：US20140218032A1
公开(公告)日：2014-08-07
申请号：US13931382
申请日：2013-06-28
发明人： Hamidreza Mohebbi , David G. Cory
CPC分类号： G01R33/60 , G01R33/34023 , G01R33/3415 , G01R33/3456
摘要： In some aspects, a resonator device for spin resonance applications is described. In some examples, the resonator device includes a substrate, terminals, and resonators. The terminals include a first terminal having first terminal segments disposed on a substrate surface, and a second terminal having second terminal segments disposed on the substrate surface opposite the first terminal segments. The resonators include conductors disposed on the substrate surface between the first and second terminals. Each conductor is disposed between one of the first terminal segments and a respective, opposite one of the second terminal segments.
摘要翻译： 在一些方面，描述了用于自旋共振应用的谐振器装置。 在一些示例中，谐振器装置包括衬底，端子和谐振器。 端子包括具有设置在基板表面上的第一端子段的第一端子和具有设置在与第一端子段相对的基板表面上的第二端子段的第二端子。 谐振器包括设置在第一和第二端子之间的衬底表面上的导体。 每个导体设置在第一端子段中的一个和第二端子段之间的相应的相对的一个之间。
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