A superconducting qubit-based device includes: a superconducting qubit comprising a first conductive pad and a second conductive pad, each being formed of a superconducting material, and a ferromagnetic body configured to form a Josephson junction with the first conductive pad and the second conductive pad; a conducting wire spaced apart from the ferromagnetic body by a predetermined distance; and a control circuit configured to control a resonance frequency of the superconducting qubit by controlling a current flowing through the conducting wire.

A nanowire photodetection system comprising an optical waveguide and superconducting nanowires. The optical waveguide is located on a substrate. The superconducting nanowires are electrically connected in parallel to connector wires located on both sides of the optical waveguide. A set of the superconducting nanowires cross a width of the optical waveguide and absorb a photon in the optical waveguide.

A nanowire photodetection system comprising an optical waveguide and superconducting nanowires. The optical waveguide is located on a substrate. The superconducting nanowires are electrically connected in parallel to connector wires located on both sides of the optical waveguide. A set of the superconducting nanowires cross a width of the optical waveguide and absorb a photon in the optical waveguide.

The present disclosure discloses an air bridge manufacturing method, a quantum chip, and a quantum computer, and relates to the field of quantum chip technologies. One method, performed by a photolithography device, includes constructing a bridge support structure for an air bridge on a substrate with a coplanar waveguide by using photoresist; performing ion beam milling processing on the substrate with the bridge support structure to obtain an initial air bridge, the ion beam milling processing being configured for denaturing photoresist on a surface layer of the bridge support structure; and performing light-illumination processing and photoresist removal processing on a photoresist region comprising denatured photoresist in the initial air bridge, to obtain the air bridge. Through embodiments of the present disclosure, a photoresist removal effect can be improved, and a success rate of air bridge manufacturing can be improved.

Various fabrication methods are disclosed. In one such method, at least one structure is formed on a substrate which protrudes outwardly from a plane of the substrate. A beam is used to form a layer of material, at least part of which is in direct contact with a semiconductor structure on the substrate, the semiconductor structure comprising at least one nanowire. The beam has a non-zero angle of incidence relative to the normal of the plane of the substrate such that the beam is incident on one side of the protruding structure, thereby preventing a portion of the nanowire in a shadow region adjacent the other side of the protruding structure in the plane of the substrate from being covered with the material.

Various fabrication methods are disclosed. In one such method, at least one structure is formed on a substrate which protrudes outwardly from a plane of the substrate. A beam is used to form a layer of material, at least part of which is in direct contact with a semiconductor structure on the substrate, the semiconductor structure comprising at least one nanowire. The beam has a non-zero angle of incidence relative to the normal of the plane of the substrate such that the beam is incident on one side of the protruding structure, thereby preventing a portion of the nanowire in a shadow region adjacent the other side of the protruding structure in the plane of the substrate from being covered with the material.

A phase insulator according to the present invention can generate a spin current from the energy of a dipole composed of a particle and an antiparticle, and energy of the phase insulator is composed with mobility of the particle and stability of the antiparticle. The particle makes a particle velocity of a conductor, and the antiparticle makes stability of the insulator. The stability of the antiparticle becomes different according to the spin current of the phase insulator. Examples of the spin current include a Majorana fermion, a Weyl fermion, a Dirac fermion, and a neutrino, wherein the Dirac fermion has large stability and mobility and is live with a supercurrent. When a leakage current is interrupted using the Dirac fermion, as the quantum efficiency of an electronic circuit enhances, the span of life becomes longer and stability increases. The leakage current always exists in case that no phase insulator is used. The Majorana fermion which is an antiparticle has large stability due to quantum fluctuation but lacks mobility, and the Weyl fermion has mobility but has less stability than that of the Dirac fermion. The Dirac fermion which generates a supercurrent has both large stability and large mobility. The neutrino which is a particulate neutral current lacks stability and shows that mobility is not large. The phase insulator may be treated by a step of carrying out heat treatment after deposition, or the phase insulator may comprise a heat-resisting when applied to the other electronic circuits.

A phase insulator according to the present invention can generate a spin current from the energy of a dipole composed of a particle and an antiparticle, and energy of the phase insulator is composed with mobility of the particle and stability of the antiparticle. The particle makes a particle velocity of a conductor, and the antiparticle makes stability of the insulator. The stability of the antiparticle becomes different according to the spin current of the phase insulator. Examples of the spin current include a Majorana fermion, a Weyl fermion, a Dirac fermion, and a neutrino, wherein the Dirac fermion has large stability and mobility and is live with a supercurrent. When a leakage current is interrupted using the Dirac fermion, as the quantum efficiency of an electronic circuit enhances, the span of life becomes longer and stability increases. The leakage current always exists in case that no phase insulator is used. The Majorana fermion which is an antiparticle has large stability due to quantum fluctuation but lacks mobility, and the Weyl fermion has mobility but has less stability than that of the Dirac fermion. The Dirac fermion which generates a supercurrent has both large stability and large mobility. The neutrino which is a particulate neutral current lacks stability and shows that mobility is not large. The phase insulator may be treated by a step of carrying out heat treatment after deposition, or the phase insulator may comprise a heat-resisting when applied to the other electronic circuits.

Various systems and methods are presented regarding utilizing a spiral resonator to enhance coupling between a first inductor loop and a second inductor loop to enable coupling between a first qubit and a second qubit. Operation of the first inductor loop can be controlled by a flux-tunable TCQ coupler, wherein flux-tuning can adjust operation from an OFF state (no coupling between the first qubit and the second qubit) to an ON state (the first qubit and second qubit are coupled). The spiral resonator can be located at the center of, and in the same plane as the loop of the first inductor loop. The spiral resonator can enhance inductive coupling between the first loop inductor and the second loop inductor.

Various systems and methods are presented regarding utilizing a spiral resonator to enhance coupling between a first inductor loop and a second inductor loop to enable coupling between a first qubit and a second qubit. Operation of the first inductor loop can be controlled by a flux-tunable TCQ coupler, wherein flux-tuning can adjust operation from an OFF state (no coupling between the first qubit and the second qubit) to an ON state (the first qubit and second qubit are coupled). The spiral resonator can be located at the center of, and in the same plane as the loop of the first inductor loop. The spiral resonator can enhance inductive coupling between the first loop inductor and the second loop inductor.