8results about "Dissimilar materials junction devices" patented technology

To provide a superconducting circuit capable of reducing crosstalk.SOLUTION: A superconducting circuit (1) includes: a ground plane (30) that has a superconducting member; multiple superconducting parts (10) surrounded at intervals from the ground plane by non-conducting parts (40), the multiple superconducting parts each having four coupling ports that interact with the other superconducting parts; a superconducting quantum interference device (12) that sets the resonance frequency of the first superconducting part included in the multiple superconducting parts; and a three-dimensional wiring that forms a superconducting loop surrounding the superconducting quantum interference device with the ground plane. The superconducting quantum interference device is placed in a position where a magnetic field is applied by a current from the bias line (13G) to the first superconducting part in the region within the superconducting loop.SELECTED DRAWING: Figure 3

A computing device is provided that includes a magnetic Josephson junction with an embedded magnetic field control element. An on-chip magnetic field control device is formed adjacent to a Josephson junction (JJ) structure. The on-chip magnetic field control device includes a wiring structure disposed laterally adjacent to the JJ structure. In some embodiments, the magnetic field control device also includes, in addition to the wiring structure, a conductive plate connected to the wiring structure and disposed below the JJ structure. Using a current through the wiring structure directly or indirectly induces a magnetic field into the JJ structure. The strength of the field is modulated by the amount of current passing through the wiring structure. The magnetic field can be stopped as needed by not allowing current to flow through the wiring structure.

To provide a superconducting quantum circuit device with high scalability in terms of scale, etc., and capable of adjusting coupling strength.SOLUTION: A superconducting quantum circuit device comprises: a SQUID (superconducting quantum interference device) in which a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction are connected in a loop; two or four Josephson parametric oscillators, each of which includes a line supplying magnetic flux interlinking with the loop of the SQUID, and parametrically oscillating according to a pump signal supplied to the line; and a combiner combining the two or four Josephson parametric oscillators, the superconducting quantum circuit device further comprises means for varying the strength of the two-body or four-body interaction by varying the relative phase between the pump signals respectively supplied to the lines of the two or four Josephson parametric oscillators for parametric oscillation.SELECTED DRAWING: Figure 2A

To provide an electronic circuit and a calculation device capable of improving characteristics.SOLUTION: An electronic circuit includes a first quantum bit, a second quantum bit, a first coupler, a first reading conductive member, and a first filter. The first coupler includes a first resonator and a second resonator. The first resonator can be coupled with the first quantum bit. The second resonator can be coupled with the second quantum bit. The first filter includes a first filter portion, a first other filter portion, and a first reading portion. The first filter portion can be coupled with the first resonator. The first other filter portion can be coupled with the second resonator. The first reading portion can be coupled with the first reading conductive member.SELECTED DRAWING: Figure 1

In a general aspect, a microwave quantum circuit includes an on-chip impedance matching circuit. In some cases, a microwave quantum circuit includes a dielectric substrate, a quantum circuit device on the substrate, and an impedance matching circuit device on the substrate. The quantum circuit device includes a Josephson junction, and the impedance matching circuit device is coupled to the quantum circuit device on the substrate.

To provide a superconducting quantum circuit including four-body interaction coupler that has an excellent noise resistance characteristic and is applicable to an actual application.SOLUTION: A four-body interaction coupler, in a planer circuit configuration, comprises a first electrode and a second electrode disposed facing each other and away from a circumambient ground pattern, the first electrode being provided with a first facing part and a second facing part that extend from a portion of the first electrode different from the side facing the second electrode toward sides of a first quantum bit and a second quantum bit, respectively, the second electrode being provided with a first facing part and a second facing part that extend from a portion of the second electrode different from the side facing the first electrode toward sides of third quantum bit and forth quantum bit, respectively, and provided with a non-liner device including a Josephson junction crosslinking the first electrode and the second electrode, at least one of a gap width between the first electrode and the ground pattern facing the first electrode and a gap width between the second electrode and the ground pattern facing the second electrode is set to a value equal to or a fraction of a size of the first electrode or the second electrode.SELECTED DRAWING: Figure 3

An active cooling structure is provided that includes a non-superconducting layer, a superconducting layer, and an array of superconductor-insulator-normal metal (NIS) tunnel junctions. The non-superconducting layer can include a plurality of non-superconducting traces. The superconducting layer can include a plurality of superconducting traces. The array of superconductor-insulator-normal metal (NIS) tunnel junctions can be disposed between the plurality of non-superconducting traces and the plurality of superconducting traces.

This disclosure relates to optical devices for quantum information processing applications. In one example implementation, a semiconductor structure is provided. The semiconductor structure may be embedded with single defects that can be individually addressed. An electric bias and / or one or more optical excitations may be configured to control the single defects in the semiconductor structure to produce single photons for use in quantum information processing. The electric bias and optical excitations are selected and adjusted to control various carrier processes and to reduce environmental charge instability of the single defects to achieve optical emission with wide wavelength tunability and narrow spectral linewidth. Electrically controlled single photon source and other electro-optical devices may be achieved.