A superconducting material includes YBa.sub.2Cu.sub.3O.sub.7-δ and a nano-structured, preferably nanowires, WO.sub.3 dopant in a range of from 0.01 to 3.0 wt. %, preferably 0.075 to 0.2 wt. %, based on total material weight. Methods of making the superconductor may preferably avoid solvents and pursue solid-state synthesis employing Y, Ba, and/or Cu oxides and/or carbonates.

Devices, systems, methods, computer-implemented methods, apparatus, and/or computer program products that can facilitate a switch device that shifts frequency of a resonator in a quantum device are provided. According to an embodiment, a device can comprise a readout resonator coupled to a qubit. The device can further comprise a switch device formed across the readout resonator that shifts frequency of the readout resonator based on position of the switch device. According to another embodiment, a device can comprise a bus resonator coupled to a plurality of qubits. The device can further comprise a switch device formed across the bus resonator that shifts frequency of the bus resonator based on position of the switch device.

This nonlinear microwave filter is provided with quantum bits that are formed on a circuit board in which target quantum bits are formed which are quantum bits controlled in a superconducting quantum circuit, and that are coupled to a control waveguide to which the target quantum bits are coupled, wherein the distance to a waveguide end in the control waveguide is within a predetermined range from semi integer times the resonant wavelength, the quantum bits have a resonant frequency in which the difference from the resonant frequency of the target quantum bits is within a predetermined range, and the coupling to the control waveguide is stronger by a predetermined value than the coupling between the target quantum bits and the control waveguide.

In various embodiments, superconducting wires incorporate diffusion barriers composed of Nb alloys or Nb—Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.

In various embodiments, superconducting wires incorporate diffusion barriers composed of Nb alloys or Nb—Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.

Some examples herein provide a method for generating a magnetic field. The method may include accumulating positive charges at a first electrode; accumulating negative charges at a second electrode; and rotating the first electrode relative to the second electrode so as to induce a relative angular velocity between the positive charges and the negative charges and thus generate a magnetic field. In some examples, the magnetic field may be used for propulsion.

An oxide superconducting wire includes a superconductor laminate including an oxide superconducting layer on at least one surface of a base material, and a plating layer which is included in a stabilizing layer of the superconductor laminate and formed by plating. A surface roughness Ra of the plating layer is 1.0 μm or more and 2.0 μm or less. An entire average crystal grain size of the plating layer is 0.86 μm or more and 3.05 μm or less.

A superconductor device comprises a graphite structure, a first electrode, a second electrode, and a wrinkle region. The graphite structure comprises at least one topmost atomic layer. The first electrode is arranged over the at least one topmost atomic layer. The second electrode is arranged over the at least one topmost atomic layer and spaced apart from the first electrode. The wrinkle region is comprised in the at least one topmost atomic layer. The wrinkle region is arranged between the first electrode and the second electrode and comprises a plurality of wrinkles with a pair of wrinkles. The first electrode and the second electrode both electrically contact both wrinkles of the pair. A distance between the wrinkles of the pair is at most 0.2 μm.

This disclosure teaches methods for making high-temperature superconducting striated tape combinations and the product high-temperature superconducting striated tape combinations. This disclosure describes an efficient and scalable method for aligning and bonding two superimposed high-temperature superconducting (HTS) filamentary tapes to form a single integrated tape structure. This invention aligns a bottom and top HTS tape with a thin intervening insulator layer with microscopic precision, and electrically connects the two sets of tape filaments with each other. The insulating layer also reinforces adhesion of the top and bottom tapes, mitigating mechanical stress at the electrical connections. The ability of this method to precisely align separate tapes to form a single tape structure makes it compatible with a reel-to-reel production process.

In various embodiments, superconducting wires incorporate diffusion barriers composed of Nb alloys or Nb—Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.