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1. 发明授权

US06919579B2 Quantum bit with a multi-terminal junction and loop with a phase shift 有权
标题翻译：具有多端点的量子位和具有相移的环路
公开(公告)号：US06919579B2
公开(公告)日：2005-07-19
申请号：US09839637
申请日：2001-04-20
申请人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Alexandre Blais
发明人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Alexandre Blais
IPC分类号： G06N99/00 , H01L39/22
CPC分类号： G06N99/002 , B82Y10/00 , H01L39/223 , H01L39/225 , H01L39/228 , Y10S977/933
摘要： A solid-state quantum computing qubit includes a multi-terminal junction coupled to a superconducting loop where the superconducting loop introduces a phase shift to the superconducting order parameter. The ground state of the supercurrent in the superconducting loop and multi-terminal junction is doubly degenerate, with two supercurrent ground states having distinct magnetic moments. These quantum states of the supercurrents in the superconducting loop create qubits for quantum computing. The quantum states can be initialized by applying transport currents to the external leads. Arbitrary single qubit operations may be performed by varying the transport current and/or an externally applied magnetic field. Read-out may be performed using direct measurement of the magnetic moment of the qubit state, or alternatively, radio-frequency single electron transistor electrometers can be used as read-out devices when determining a result of the quantum computing. Further, qubits as described above can form arrays of qubits for performing controlled quantum computing calculations. In one example, an array of qubits can be utilized as a random number generator.
摘要翻译：固态量子计算量子位包括耦合到超导环路的多端子结，其中超导环路将相移引入超导阶数参数。超导环路和多端子结中的超电流的基态是双重退化的，两个超级电流基态具有不同的磁矩。超导环路中的超电流的这些量子态产生量子计算的量子位。可以通过将输送电流施加到外部引线来初始化量子态。可以通过改变传输电流和/或外部施加的磁场来执行任意的单量子比特操作。可以使用量子位状态的磁矩的直接测量来执行读出，或者，当确定量子计算的结果时，可以使用射频单电子晶体管静电仪作为读出装置。此外，如上所述的量子位可以形成用于执行受控量子计算计算的量子位的数组。在一个示例中，可以使用量子位的阵列作为随机数发生器。

2. 发明授权

US06987282B2 Quantum bit with a multi-terminal junction and loop with a phase shift 有权
公开(公告)号：US06987282B2
公开(公告)日：2006-01-17
申请号：US09839636
申请日：2001-04-20
申请人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Alexandre Blais
发明人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Alexandre Blais
IPC分类号： H01L39/22
CPC分类号： G06N99/002 , B82Y10/00 , H01L39/223 , H01L39/225 , H01L39/228 , Y10S977/933
摘要： A solid-state quantum computing qubit includes a multi-terminal junction coupled to a superconducting loop where the superconducting loop introduces a phase shift to the superconducting order parameter. The ground state of the supercurrent in the superconducting loop and multi-terminal junction is doubly degenerate, with two supercurrent ground states having distinct magnetic moments. These quantum states of the supercurrents in the superconducting loop create qubits for quantum computing. The quantum states can be initialized by applying transport currents to the external leads. Arbitrary single qubit operations may be performed by varying the transport current and/or an externally applied magnetic field. Read-out may be performed using direct measurement of the magnetic moment of the qubit state, or alternatively, radio-frequency single electron transistor electrometers can be used as read-out devices when determining a result of the quantum computing. Further, qubits as described above can form arrays of qubits for performing controlled quantum computing calculations. In one example, an array of qubits can be utilized as a random number generator.

3. 发明授权

US06905887B2 High sensitivity, directional dc-SQUID magnetometer 有权
标题翻译：高灵敏度，方向直流 - SQUID磁力计
公开(公告)号：US06905887B2
公开(公告)日：2005-06-14
申请号：US10192623
申请日：2002-07-09
申请人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Jeremy P. Hilton
发明人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Jeremy P. Hilton
IPC分类号： G01R33/035 , H01L39/22 , H01L39/24 , H01L21/00
CPC分类号： G01R33/0354 , H01L39/225 , H01L39/2496 , Y10S505/874 , Y10S977/933
摘要： A solid state dc-SQUID includes a superconducting loop containing a plurality of Josephson junctions, wherein an intrinsic phase shift is accumulated through the loop. In an embodiment of the invention, the current-phase response of the dc-SQUID sits in a linear regime where directional sensitivity to flux through the loop occurs. Changes in the flux passing through the superconducting loop stimulates current which can be quantified, thus providing a means of measuring the magnetic field. Given the linear and directional response regime of the embodied device, an inherent current to phase sensitivity is achieved that would otherwise be unobtainable in common dc-SQUID devices without extrinsic intervention.
摘要翻译：固态dc-SQUID包括包含多个约瑟夫逊结的超导回路，其中本征相移通过回路积累。在本发明的一个实施例中，dc-SQUID的电流相位响应处于线性状态，其中发生通过环路的通量的方向灵敏度。通过超导环路的通量的变化会刺激可量化的电流，从而提供测量磁场的方法。给定所体现的装置的线性和方向响应方案，实现固有的电流到相位灵敏度，否则在相同的dc-SQUID装置中将无法获得，而不需要外部干预。

4. 发明授权

US06627916B2 High sensitivity, directional DC-squid magnetometer 有权
标题翻译：高灵敏度，定向直流鱿鱼磁强计
公开(公告)号：US06627916B2
公开(公告)日：2003-09-30
申请号：US09823895
申请日：2001-03-31
申请人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Jeremy P. Hilton
发明人： Mohammad H. S. Amin , Timothy Duty , Alexander Omelyanchouk , Geordie Rose , Alexandre Zagoskin , Jeremy P. Hilton
IPC分类号： H01L3922
CPC分类号： G01R33/0354 , H01L39/225 , H01L39/2496 , Y10S505/874 , Y10S977/933
摘要： A solid state dc-SQUID includes a superconducting loop containing a plurality of Josephson junctions, wherein an intrinsic phase shift is accumulated through the loop. In an embodiment of the invention, the current-phase response of the dc-SQUID sits in a linear regime where directional sensitivity to flux through the loop occurs. Changes in the flux passing through the superconducting loop stimulates current which can be quantified, thus providing a means of measuring the magnetic field. Given the linear and directional response regime of the embodied device, an inherent current to phase sensitivity is achieved that would otherwise be unobtainable in common dc-SQUID devices without extrinsic intervention.
摘要翻译：固态dc-SQUID包括包含多个约瑟夫逊结的超导回路，其中本征相移通过回路积累。在本发明的一个实施例中，dc-SQUID的电流相位响应处于线性状态，其中发生通过环路的通量的方向灵敏度。通过超导环路的通量的变化会刺激可量化的电流，从而提供测量磁场的方法。给定所体现的装置的线性和方向响应方案，实现固有的电流到相位灵敏度，否则在相同的dc-SQUID装置中将无法获得，而不需要外部干预。

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