Using the Meissner effect in superconductors, demonstrated here is the capability to create an arbitrarily high magnetic flux density (also sometimes referred to as “flux squeezing”). This technique has immediate applications for numerous technologies. For example, it allows the generation of very large magnetic fields (e.g., exceeding 1 Tesla) for nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), the generation of controlled magnetic fields for advanced superconducting quantum computing devices, and/or the like. The magnetic field concentration/increased flux density approaches can be applied to both static magnetic fields (i.e., direct current (DC) magnetic fields) and time-varying magnetic fields (i.e., alternating current (AC) magnetic fields) up to microwave frequencies.

Using the Meissner effect in superconductors, demonstrated here is the capability to create an arbitrarily high magnetic flux density (also sometimes referred to as “flux squeezing”). This technique has immediate applications for numerous technologies. For example, it allows the generation of very large magnetic fields (e.g., exceeding 1 Tesla) for nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), the generation of controlled magnetic fields for advanced superconducting quantum computing devices, and/or the like. The magnetic field concentration/increased flux density approaches can be applied to both static magnetic fields (i.e., direct current (DC) magnetic fields) and time-varying magnetic fields (i.e., alternating current (AC) magnetic fields) up to microwave frequencies.

A composite superconducting tape, a combination and preparation method thereof, and a defect bypassing or an end joint connection method. The composite superconducting tape includes a plurality of superconducting tapes, including a first superconducting tape and a second superconducting tape. The first superconducting tape includes a first superconducting layer, and the second superconducting tape includes a second superconducting layer. A side of the first superconducting tape close to the first superconducting layer is bonded with a side of the second superconducting tape close to the second superconducting layer along a length direction. The first superconducting tape is misaligned with the second superconducting tape along a width direction, such that the side of the first superconducting tape has a first vacant area for bonding with a second conductive tape, and the side of the second superconducting tape has a second vacant area for bonding with the first conductive tape.

A composite superconducting tape, a combination and preparation method thereof, and a defect bypassing or an end joint connection method. The composite superconducting tape includes a plurality of superconducting tapes, including a first superconducting tape and a second superconducting tape. The first superconducting tape includes a first superconducting layer, and the second superconducting tape includes a second superconducting layer. A side of the first superconducting tape close to the first superconducting layer is bonded with a side of the second superconducting tape close to the second superconducting layer along a length direction. The first superconducting tape is misaligned with the second superconducting tape along a width direction, such that the side of the first superconducting tape has a first vacant area for bonding with a second conductive tape, and the side of the second superconducting tape has a second vacant area for bonding with the first conductive tape.

A superconducting integrated circuit, comprising a plurality of superconducting circuit elements, each having a variation in operating voltage over time; a common power line; and a plurality of bias circuits, each connected to the common power line, and to a respective superconducting circuit element, wherein each respective bias circuit is superconducting during at least one time portion of the operation of a respective superconducting circuit element, and is configured to supply the variation in operating voltage over time to the respective superconducting circuit element.

A method of forming a superconductor tape, includes depositing a superconductor layer on a substrate, forming a metal layer comprising a first metal on a surface of the superconductor layer, and implanting an alloy species into the metal layer where the first metal forms a metal alloy after the implanting the alloy species.

A method of forming a superconductor tape, includes depositing a superconductor layer on a substrate, forming a metal layer comprising a first metal on a surface of the superconductor layer, and implanting an alloy species into the metal layer where the first metal forms a metal alloy after the implanting the alloy species.

An architecture for, and techniques for fabricating, a thermal decoupling device are provided. In some embodiments, thermal decoupling device can be included in a thermally decoupled cryogenic microwave filter. In some embodiments, the thermal decoupling device can comprise a dielectric material and a conductive line. The dielectric material can comprise a first channel that is separated from a second channel by a wall of the dielectric material. The conductive line can comprise a first segment and a second segment that are separated by the wall. The wall can facilitate propagation of a microwave signal between the first segment and the second segment and can reduce heat flow between the first segment and the second segment of the conductive line.

An architecture for, and techniques for fabricating, a thermal decoupling device are provided. In some embodiments, thermal decoupling device can be included in a thermally decoupled cryogenic microwave filter. In some embodiments, the thermal decoupling device can comprise a dielectric material and a conductive line. The dielectric material can comprise a first channel that is separated from a second channel by a wall of the dielectric material. The conductive line can comprise a first segment and a second segment that are separated by the wall. The wall can facilitate propagation of a microwave signal between the first segment and the second segment and can reduce heat flow between the first segment and the second segment of the conductive line.

The present invention is a superconducting stabilization material used for a superconducting wire, which is formed of a copper material which contains: one or more types of additive elements selected from Ca, La, and Ce in a total of 3 ppm by mass to 400 ppm by mass; and a balance being Cu and inevitable impurities and in which a total concentration of the inevitable impurities excluding O, H, C, N, and S which are gas components is 5 ppm by mass to 100 ppm by mass.