Class / Patent application number | Description | Number of patent applications / Date published |
327527000 | Superconductive (e.g., cryogenic, etc.) device | 16 |
20080297230 | Interfacing at low temperature using CMOS technology - This invention concerns interfacing to electronic circuits or systems operating at low temperature or ultra-low temperature using complementary metal-oxide semiconductor (CMOS) technology. Low temperature in this case refers to cryogenic temperatures in particular, but not exclusively, to the 4.2 K region. Ultra-low temperatures here refers to the sub-1 K range, usually accessed using dilution refrigerator systems. The electronic circuits comprise a controller (for writing and manipulation), an observer (for readout and measurement) circuits, or both, fabricated from ultra-thin silicon-on-insulator (SOI) CMOS technology. | 12-04-2008 |
20110063016 | METHOD FOR CONTROLLING INTER-COMPONENT PHASE DIFFERENCE SOLITON AND INTER-COMPONENT PHASE DIFFERENCE SOLITON CIRCUIT DEVICE - A control method is proposed that controls inter-component phase difference solitons by using splitting or fusion caused by the interaction between inter-component phase difference solitons themselves, without the need for application of external energy. By using a line structure ( | 03-17-2011 |
20110102068 | GRAPHENE DEVICE AND METHOD OF USING GRAPHENE DEVICE - An embodiment of a graphene device includes a layered structure, first and second electrodes, and a dopant island. The layered structure includes a conductive layer, an insulating layer, and a graphene layer. The electrodes are coupled to the graphene layer. The dopant island is coupled to an exposed surface of the graphene layer between the electrodes. An embodiment of a method of using a graphene device includes providing the graphene device. A voltage is applied to the conductive layer of the graphene device. Another embodiment of a method of using a graphene device includes providing the graphene device without the dopant island. A dopant island is placed on an exposed surface of the graphene layer between the electrodes. A voltage is applied to the conductive layer of the graphene device. A response of the dopant island to the voltage is observed. | 05-05-2011 |
20190148848 | Methods and Devices for Impedance Multiplication | 05-16-2019 |
327528000 | Josephson junction | 12 |
20080238531 | SYSTEMS, DEVICES, AND METHODS FOR CONTROLLABLY COUPLING QUBITS - A coupling system may include an rf-SQUID having a loop of superconducting material interrupted by a compound Josephson junction; and a first magnetic flux inductor configured to selectively provide a mutual inductance coupling the first magnetic flux inductor to the compound Josephson junction, wherein the loop of superconducting material positioned with respect to a first and second qubits to provide respective mutual inductance coupling therebetween. The coupling system may further include a second magnetic flux inductor configured to selectively provide a second magnetic flux inductor mutual inductance coupling the second magnetic flux inductor to the compound Josephson junction. A superconducting processor may include the coupling system and two or more qubits. A method may include providing the first, the second and the third mutual inductances. | 10-02-2008 |
20090015317 | METHODS AND SYSTEMS FOR CONTROLLING QUBITS - A system for quantum computing includes a plurality of qubits and a control system. The control system generates control signals to control operation of the qubits and sets a bias point of each quit between a first position, in which the qubit is disabled and not responsive to the control signals, and a second positions in which the qubit is enabled and responsive to the control signals. | 01-15-2009 |
20090079494 | METHOD OF OPERATING QUANTUM-MECHANICAL MEMORY AND COMPUTATIONAL DEVICES - A method of operating a quantum system comprising computational elements, including an insulated ring of superconductive material, and semi-closed rings used as an interface between the computational elements and the external world, is disclosed. In one aspect, the method comprises providing an electrical signal, e.g. a current, in an input ring magnetically coupled to a computational element, which generates a magnetic field in the computational element and sensing the change in the current and/or voltage of an output element magnetically coupled to the computational element. The electrical input signal can be an AC signal or a DC signal. The computational element is electromagnetically coupled with other adjacent computational elements and/or with the interface elements. The corresponding magnetic flux between the computational elements and/or the interface elements acts as an information carrier. Ferromagnetic cores are used to improve the magnetic coupling between adjacent elements. | 03-26-2009 |
20100148853 | SYSTEMS, DEVICES, AND METHODS FOR CONTROLLABLY COUPLING QUBITS - A system for communicably coupling between two superconducting qubits may include an rf-SQUID coupler having a loop of superconducting material interrupted by a compound Josephson junction and a first magnetic flux inductor configured to controllably couple to the compound Josephson junction. The loop of superconducting material may be positioned with respect to a first qubit and a second qubit to provide respective mutual inductance coupling therebetween. The coupling system may be configured to provide ferromagnetic coupling, anti-ferromagnetic coupling, and/or zero coupling between the first and second qubits. The rf-SQUID coupler may be configured such that there is about zero persistent current circulating in the loop of superconducting material during operation. | 06-17-2010 |
20100194466 | QUANTUM BIT VARIABLE COUPLING METHOD, QUANTUM COMPUTING CIRCUIT USING THE METHOD, AND VARIABLE COUPLER - There is provided a quantum computing circuit comprising first and second superconductive magnetic flux quantum bit elements ( | 08-05-2010 |
20110018612 | SYSTEM, DEVICES AND METHODS FOR COUPLING QUBITS - A ladder structure is ferromagnetically coupled to a first qubit where the ladder structure has a monostable energy potential in use, such that the first qubit and the ladder structure effectively operate as a single qubit. The ladder structure and first qubit may be coupled via a superconducting flux coupler. The ladder structure may be a chain of at least two ferromagnetically coupled ladder elements. A value for each ladder element may be less than about 1. | 01-27-2011 |
20110241765 | PHASE QUANTUM BIT - A phase quantum bit is disclosed. In one embodiment, the phase quantum bit may comprise a Josephson junction and a distributed element coupled to the Josephson junction. The distributed element provides a capacitive component and an inductive component of the phase quantum bit. | 10-06-2011 |
20140167836 | QUANTUM CIRCUIT WITHIN WAVEGUIDE-BEYOND-CUTOFF - A quantum information processing system includes a waveguide having an aperture, a non-linear quantum circuit disposed in the waveguide and an electromagnetic control signal source coupled to the aperture. | 06-19-2014 |
20160079968 | TUNABLE TRANSMON CIRCUIT ASSEMBLY - Systems and methods are provided for a tunable transmon qubit. The qubit includes a first Josephson junction on a first path between a transmission line and a circuit ground and second and third Josephson junctions arranged in parallel with one another on a second path between the transmission line and the circuit ground to form a direct current superconducting quantum interference device (DC SQUID). The DC SQUID is in parallel with the first Josephson junction. A capacitor is arranged in parallel with the first Josephson junction and the DC SQUID on a third path between the transmission line and the circuit ground as to form, in combination with the first path, an outer loop of the tunable transmon qubit. A bias circuit is configured to provide a constant bias flux to one of the DC SQUID and the outer loop of the tunable transmon qubit. | 03-17-2016 |
20160112031 | TUNABLE SUPERCONDUCTING NOTCH FILTER - A technique relates to a superconductor tunable notch filter. A Josephson junction filter array is connected to a coupling pad and connected to ground. The Josephson junction filter array includes a filter inductance. The Josephson junction filter array connected to the coupling pad forms a filter capacitance. A Josephson junction bias array is connected to the coupling pad and connected to a current source. The Josephson junction bias array includes a bias inductance. A transmission line is connected to the coupling pad in which connection of the transmission line and the coupling pad forms a coupling capacitance, such that the filter inductance and the filter capacitance connect to the transmission line through the coupling capacitance. The Josephson junction filter array includes a notch filter frequency that is tunable according to a magnitude of a current bias from the current source. | 04-21-2016 |
20160164505 | JOSEPHSON CURRENT SOURCE SYSTEMS AND METHOD - One embodiment describes a Josephson current source system. The system includes a flux-shuttle loop that is inductively coupled with an AC input signal. The flux-shuttle loop includes a plurality of Josephson junctions spaced about the flux-shuttle loop and being configured, when activated, to sequentially trigger the plurality of Josephson junctions about the flux-shuttle loop in response to the AC input signal to generate a DC output current provided through an output inductor. The system also includes a flux injector that is configured to selectively activate and deactivate the flux-shuttle loop in response to an input signal to control an amplitude of the DC output current. | 06-09-2016 |
20180026633 | SUPERCONDUCTING SINGLE-POLE DOUBLE-THROW SWITCH SYSTEM | 01-25-2018 |