Described herein is an apparatus for quality control of a superconducting tape including (a) at least two rolls contacting the superconducting tape and being suitable for injecting an electric current into the superconducting tape; (b) at least two measuring contacts contacting the superconducting tape and being suitable for measuring an electric voltage along the superconducting tape; and (c) a cooling section suitable for cooling the superconducting tape below its critical temperature,
where the at least two rolls and the at least two measuring contacts are located inside the cooling section, and
where the cooling section is suitable for keeping the rolls at a first temperature and the measuring contacts at a second temperature, where the first temperature is lower than the second temperature.

Proposed is a phase shift introduction method, a structure, and a circuit device for eliminating or minimizing a risk associated with dissimilar materials, solving in principle a problem of mixing of a signal current and a control current that occurs due to DC connection of a phase shifter to a signal line, and stably and reliably providing a phase shift that is desired to be introduced without being adversely effected by noise generated by an ambient magnetic field, which is generated due to use of an external power supply. A structure according to the present invention includes a phase shifter 101 and a closed-loop circuit 103 that is directly used for computation or storage, and a quantum phase shift is generated in the closed-loop circuit 103 by using a fractional flux quantum captured by the phase shifter 101 that is DC-separated from the closed-loop circuit 103.

Abnormalities in electromagnetic fields in the heart, brain, and stomach, among other organs and tissues of the human body, can be indicative of serious health conditions. Described herein are methods, software, systems and devices for detecting the presence of an abnormality in an organ or tissue of a subject by analysis of the electromagnetic fields generated by the organ or tissue.

Abnormalities in electromagnetic fields in the heart, brain, and stomach, among other organs and tissues of the human body, can be indicative of serious health conditions. Described herein are methods, software, systems and devices for detecting the presence of an abnormality in an organ or tissue of a subject by analysis of the electromagnetic fields generated by the organ or tissue.

Abnormalities in electromagnetic fields in the heart, brain, and stomach, among other organs and tissues of the human body, can be indicative of serious health conditions. Described herein are methods, software, systems and devices for detecting the presence of an abnormality in an organ or tissue of a subject by analysis of the electromagnetic fields generated by the organ or tissue.

A low-temperature superconducting device for measuring gravity, includes a low-temperature container, a cryocooler, a rotor chamber, a superconducting rotor, an upper levitation coil, a lower levitation coil, an upper electrode, an intermediate electrode, a lower electrode, a magnetic shielding chamber and a superconducting quantum interference device. By cooling the whole low-temperature superconducting device using a cryocooler, the intermediate electrode disposed in the body of the magnetic shielding chamber will generate an output voltage when the superconducting rotor is displaced due to a change of gravity. Thus, the superconducting quantum interference device can make the superconducting rotor return to the central balance position by adjusting the operating current of the upper levitation coil or the lower levitation coil. A change of gravity can be determined based on the operating current fed back to the upper levitation coil or the lower levitation coil.

A device for detecting a quench in a superconducting coil according to one aspect of the invention includes a first superconducting coil and a second superconducting coil that are connected in series. The first superconducting coil and the second superconducting coil have the same shape. A first axis of the first superconducting coil and a second axis of the second superconducting coil are arranged at the same position and in the same direction, and the position of the first superconducting coil and the position of the second superconducting coil in the direction of the first and second axes are the same. The length of a winding wire of the first superconducting coil and the length of a winding wire of the second superconducting coil are equal to each other.

Methods and systems for estimating localization lengths in hybrid superconductor-semiconductor quantum devices are described. A method for estimating localization lengths in a hybrid superconductor-semiconductor quantum device includes constructing a statistical model for extracting localization lengths based on an implicit description of nonlocal conductance measurements associated with a physical representation of the hybrid superconductor-semiconductor quantum device. The method further includes, using a processor, estimating the localization lengths in the hybrid superconductor-semiconductor quantum device by a joint prior distribution enforcing smoothness over a function of gate voltages and extracted localization lengths for the hybrid superconductor-semiconductor quantum device.

A method and apparatus for quality control of superconducting tapes, comprising non-destructive and non-contact methods for measuring the surface resistance of a superconducting tape during tape growth. The dielectric resonator techniques of the present invention can be adapted for measurements at the elevated temperatures used during annealing as well as at room and lower temperatures, providing the opportunity for real-time quality control of semiconductor tapes as they are being fabricated.

Devices and methods for estimating localization lengths in hybrid superconductor-semiconductor quantum (HSSQ) devices are described. A method for estimating localization lengths in an HSSQ device comprising a set of plunger gates formed in a first layer of the HSSQ device and a set of top gates formed, above the set of plunger gates, in a second layer of the HSSQ device, includes obtaining measurements of nonlocal conductance values associated with the HSSQ device. The at least one junction associated with the HSSQ device attenuates one or more of the measured nonlocal conductance values associated with the HSSQ device. The method further includes normalizing the measured nonlocal conductance values to remove an effect of the attenuation caused by the at least one junction and extracting localization lengths based on the normalized nonlocal conductance values. The method further includes, using a processor, estimating the localization lengths for the HSSQ device.