High-temperature superconducting qubit comprising quantum-mechanical two-level system and fabrication

A high-temperature superconducting qubit, comprising:

• a first superconductor comprising:
• a first high-temperature superconductor material comprising a first layered structure, a first surface, a first primary lattice vector parallel to a layer of the first layered structure, and a first orientation associated with the first primary lattice vector,
• a second superconductor comprising:
• a second high-temperature superconductor material comprising a second layered structure, a second surface, a second primary lattice vector parallel to a layer of the second layered structure, and a second orientation associated with the second primary lattice vector,
• an overlap region, wherein in the overlap region at least a first section of the first surface and at least a second section of the second surface overlap, the first section and the second section are arranged in parallel at a distance corresponding to a predefined distance, and the first orientation and the second orientation are arranged with an angle corresponding to a predefined angle,
• wherein:
• the layer of the first layered structure is essentially parallel to the first section of the first surface,
• the layer of the second layered structure is essentially parallel to the second section of the second surface, and
• the high-temperature superconducting qubit comprises a Josephson junction between the first high-temperature superconductor material and the second high-temperature superconductor material, wherein the Josephson junction is adapted to provide a quantum mechanical two-level system of the high-temperature superconducting qubit.