03-12-2015 дата публикации
Номер: US20150346291A1
Принадлежит:
SQUIDs may detect local magnetic fields. SQUIDS of varying sizes, and hence sensitivities may detect different magnitudes of magnetic fields. SQUIDs may be oriented to detect magnetic fields in a variety of orientations, for example along an orthogonal reference frame of a chip or wafer. The SQUIDS may be formed or carried on the same chip or wafer as a superconducting processor (e.g., a superconducting quantum processor). Measurement of magnetic fields may permit compensation, for example allowing tuning of a compensation field via a compensation coil and/or a heater to warm select portions of a system. A SQIF may be implemented as a SQUID employing an unconventional grating structure. Successful fabrication of an operable SQIF may be facilitated by incorporating multiple Josephson junctions in series in each arm of the unconventional grating structure. 1. (canceled)2. A system for measuring magnetic fields , the system comprising: a first plurality of superconducting quantum interference devices (“SQUIDs”), each SQUID in the first plurality of SQUIDs respectively comprising a closed superconducting current path formed by a material that is superconducting below a first temperature, at least one Josephson junction that interrupts the respective closed superconducting current path, the closed superconducting current path having a longitudinal axis and enclosing a region having a respective area, the longitudinal axes of the SQUIDs in the first plurality of SQUIDs each having a first orientation, and the respective area of the region of a first one of the SQUIDs in the first plurality of SQUIDs is different than the respective area of the region of a second one of the SQUIDs in the first plurality of SQUIDs; and', 'a second plurality of SQUIDs each SQUID in the first plurality of SQUIDs respectively comprising a closed superconducting current path formed by a material that is superconducting below a second temperature, at least one Josephson junction that interrupts ...
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