A qubit coupling device includes: a dielectric substrate including a trench; a first superconductor layer on a surface of the dielectric substrate where an edge of the first superconductor layer extends along a first direction and at least a portion of the superconductor layer is in contact with the surface of the dielectric substrate, and where the superconductor layer is formed from a superconductor material exhibiting superconductor properties at or below a corresponding critical temperature; a length of the trench within the dielectric substrate is adjacent to and extends along an edge of the first superconductor layer in the first direction, and where the electric permittivity of the trench is less than the electric permittivity of the dielectric substrate.

An electronic device (e.g., a diode) is provided that includes a substrate and a patterned layer of superconducting material disposed over the substrate. The patterned layer forms a first electrode, a second electrode, and a loop coupling the first electrode with the second electrode by a first channel and a second channel. The first channel and the second channel have different minimum widths. The device further includes a magnet that applies a magnetic field to the loop, which produces an expulsion current in the loop that travels toward the second electrode in the first channel and toward the first electrode in the second channel. For a range of current magnitudes, when the magnetic field is applied to the patterned layer of superconducting material, the conductance from the first electrode to the second electrode is greater than the conductance from the second electrode to the first electrode.

Some embodiments are directed to a device including multiple substrates comprising one or more troughs. The substrates are disposed such that the one or more troughs form at least one enclosure. At least one superconducting layer covers at least a portion of the at least one enclosure. Other embodiments are directed to a method for manufacturing a superconducting device. The method includes acts of forming at least one trough in at least a first substrate; covering at least a portion of the first substrate with a superconducting material; covering at least a portion of a second substrate with the superconducting material; and bonding the first substrate and the second substrate to form at least one enclosure comprising the at least one trough and the superconducting material.

A multiple arrayed parallel nanowire device includes one or more arrays connected in series, wherein each array includes a plurality of narrow nanowires flanked by one or more wide nanowires, a top electrode, an applied current, a bottom ground electrode, and one or more lateral electrodes where one or more currents or one or more probing voltages can be applied to detect voltage changes in each array. The device detects single and multiple photons without destroying superconductivity in all the nanowires in the array and is thus capable of remaining sensitive to subsequent photon impacts. Moreover, the device can resolve the location of each photon impact.

A multiple arrayed parallel nanowire device includes one or more arrays connected in series, wherein each array includes a plurality of narrow nanowires flanked by one or more wide nanowires, a top electrode, an applied current, a bottom ground electrode, and one or more lateral electrodes where one or more currents or one or more probing voltages can be applied to detect voltage changes in each array. The device detects single and multiple photons without destroying superconductivity in all the nanowires in the array and is thus capable of remaining sensitive to subsequent photon impacts. Moreover, the device can resolve the location of each photon impact.

A multiple arrayed parallel nanowire device includes one or more arrays connected in series, wherein each array includes a plurality of narrow nanowires flanked by one or more wide nanowires, a top electrode, an applied current, a bottom ground electrode, and one or more lateral electrodes where one or more currents or one or more probing voltages can be applied to detect voltage changes in each array. The device detects single and multiple photons without destroying superconductivity in all the nanowires in the array and is thus capable of remaining sensitive to subsequent photon impacts. Moreover, the device can resolve the location of each photon impact.

A multiple arrayed parallel nanowire device includes one or more arrays connected in series, wherein each array includes a plurality of narrow nanowires flanked by one or more wide nanowires, a top electrode, an applied current, a bottom ground electrode, and one or more lateral electrodes where one or more currents or one or more probing voltages can be applied to detect voltage changes in each array. The device detects single and multiple photons without destroying superconductivity in all the nanowires in the array and is thus capable of remaining sensitive to subsequent photon impacts. Moreover, the device can resolve the location of each photon impact.

A multiple arrayed parallel nanowire device includes one or more arrays connected in series, wherein each array includes a plurality of narrow nanowires flanked by one or more wide nanowires, a top electrode, an applied current, a bottom ground electrode, and one or more lateral electrodes where one or more currents or one or more probing voltages can be applied to detect voltage changes in each array. The device detects single and multiple photons without destroying superconductivity in all the nanowires in the array and is thus capable of remaining sensitive to subsequent photon impacts. Moreover, the device can resolve the location of each photon impact.

A gravitational radiation communication system. The system includes a gravitational radiation transmitter and a gravitational radiation receiver. Each of the transmitter and the receiver includes a first cylindrical superconducting cavity, having a first length, a first diameter, and an entrance aperture for electromagnetic radiation; a second cylindrical superconducting cavity, having a second length, a second diameter, and a first aperture for gravitational radiation, the second cavity being coaxial with and adjacent the first cavity; and a superconducting movable membrane positioned between the first cavity and the second cavity and configured to provide parametric amplification of electromagnetic fields in the second cavity. The first aperture is configured to pass gravitational radiation.

An electronic device (e.g., a diode) is provided that includes a substrate and a patterned layer of superconducting material disposed over the substrate. The patterned layer forms a first electrode, a second electrode, and a loop coupling the first electrode with the second electrode by a first channel and a second channel. The first channel and the second channel have different minimum widths. The device further includes a magnet that applies a magnetic field to the loop, which produces an expulsion current in the loop that travels toward the second electrode in the first channel and toward the first electrode in the second channel. For a range of current magnitudes, when the magnetic field is applied to the patterned layer of superconducting material, the conductance from the first electrode to the second electrode is greater than the conductance from the second electrode to the first electrode.