Patent application number | Description | Published |
20080215850 | SYSTEMS, METHODS AND APPARATUS FOR LOCAL PROGRAMMING OF QUANTUM PROCESSOR ELEMENTS - Systems, methods and apparatus for a scalable quantum processor architecture. A quantum processor is locally programmable by providing a memory register with a signal embodying device control parameter(s), converting the signal to an analog signal; and administering the analog signal to one or more programmable devices. | 09-04-2008 |
20080274898 | SYSTEMS, DEVICES, AND METHODS FOR CONTROLLABLY COUPLING QUBITS - A coupling system to couple a first and a second qubit in response to a state of the coupling system that may be set by two input signals. | 11-06-2008 |
20080313430 | METHOD AND SYSTEM FOR INCREASING QUANTUM COMPUTER PROCESSING SPEED USING DIGITAL CO-PROCESSOR - A computer system includes a quantum computer, a classical co-processor and an interface that transmits at least part of at least one problem between the quantum computer and the classical co-processor. A digital computer may be coupled to the quantum computer and classical co-processor. Problems may be decomposed for solution by the quantum computer and co-processor based on computational efficiency. | 12-18-2008 |
20090008632 | SUPERCONDUCTING SHIELDING FOR USE WITH AN INTEGRATED CIRCUIT FOR QUANTUM COMPUTING - An integrated circuit for quantum computing may include a superconducting shield to limit magnetic field interactions. | 01-08-2009 |
20090075825 | SYSTEMS, METHODS, AND APPARATUS FOR CONTROLLING THE ELEMENTS OF SUPERCONDUCTING PROCESSORS - A computer system employs a network that between a data programming system and one or more superconducting programmable devices of a superconducting processor chip. Routers on the network, such as first-, second- and third-stage routers direct communications with the superconducting programmable devices. A superconducting memory register may load data signals received from a first-stage router into corresponding superconducting programmable devices. The system may employ additional superconducting chips, first-, second- or third-stage routers. | 03-19-2009 |
20090082209 | SYSTEMS, METHODS AND APPARATUS FOR DIGITAL-TO-ANALOG CONVERSION OF SUPERCONDUCTING MAGNETIC FLUX SIGNALS - A superconducting flux digital-to-analog converter includes a superconducting inductor ladder circuit. The ladder circuit includes a plurality of closed superconducting current paths that each includes at least two superconducting inductors coupled in series to form a respective superconducting loop, successively adjacent or neighboring superconducting loops are connected in parallel with each other and share at least one of the superconducting inductors to form a flux divider network. A data signal input structure provides a respective bit of a multiple bit signal to each of the superconducting loops. The data signal input structure may include a set of superconducting quantum interference devices (SQUIDs). The data signal input structure may include a superconducting shift register, for example a single-flux quantum (SFQ) shift register or a flux-based superconducting shift register comprising a number of latching qubits. | 03-26-2009 |
20090173936 | QUANTUM PROCESSOR - Multiple substrates that carry quantum devices are coupled to provide quantum mechanical communicators therebetween, for example, using superconducting interconnects, vias, solder and/or magnetic flux. Such may advantageously reduce a footprint of a device such as a quantum processor. | 07-09-2009 |
20100133514 | SUPERCONDUCTING SHIELDING FOR USE WITH AN INTEGRATED CIRCUIT FOR QUANTUM COMPUTING - An integrated circuit for quantum computing may include a superconducting shield to limit magnetic field interactions. | 06-03-2010 |
20110055520 | SYSTEMS, METHODS AND APPARATUS FOR LOCAL PROGRAMMING OF QUANTUM PROCESSOR ELEMENTS - Systems, methods and apparatus for a scalable quantum processor architecture. A quantum processor is locally programmable by providing a memory register with a signal embodying device control parameter(s), converting the signal to an analog signal; and administering the analog signal to one or more programmable devices. | 03-03-2011 |
20110057169 | SYSTEMS, METHODS AND APPARATUS FOR ACTIVE COMPENSATION OF QUANTUM PROCESSOR ELEMENTS - Apparatus and methods enable active compensation for unwanted discrepancies in the superconducting elements of quantum processor. A qubit may include a primary compound Josephson junction (CJJ) structure, which may include at least a first secondary CJJ structure to enable compensation for Josephson junction asymmetry in the primary CJJ structure. A qubit may include a series LC-circuit coupled in parallel with a first CJJ structure to provide a tunable capacitance. A qubit control system may include means for tuning inductance of a qubit loop, for instance a tunable coupler inductively coupled to the qubit loop and controlled by a programming interface, or a CJJ structure coupled in series with the qubit loop and controlled by a programming interface. | 03-10-2011 |
20110065585 | SYSTEMS, METHODS AND APPARATUS FOR MEASURING MAGNETIC FIELDS - SQUIDs may detect local magnetic fields. SQUIDS of varying sizes, and hence sensitivities may detect different magnitudes of magnetic fields. SQUIDs may be oriented to detect magnetic fields in a variety of orientations, for example along an orthogonal reference frame of a chip or wafer. The SQUIDS may be formed or carried on the same chip or wafer as a superconducting processor (e.g., a superconducting quantum processor). Measurement of magnetic fields may permit compensation, for example allowing tuning of a compensation field via a compensation coil and/or a heater to warm select portions of a system. A SQIF may be implemented as a SQUID employing an unconventional grating structure. Successful fabrication of an operable SQIF may be facilitated by incorporating multiple Josephson junctions in series in each arm of the unconventional grating structure. | 03-17-2011 |
20110065586 | SYSTEMS, METHODS AND APPARATUS FOR SUPERCONDUCTING DEMULTIPLEXER CIRCUITS - A switching cell for a demultiplexer circuit includes a superconducting input signal path, at least two superconducting output signal paths, and transformers located between an intersection node and respective ends of the output signal paths. Flux applied via the transformers can influence which direction a signal propagates. The switching cell may also include power input nodes. Switching cells may be arranged in various configurations, for example a binary tree or H-tree. A superconducting inductor ladder circuit can perform a digital-to-analog conversion. Flux storage structures may be used with individual switching cells. Latching qubits may be employed. Buffer rows of switching cells may be used to reduce or eliminate cascade error. | 03-17-2011 |
20110175061 | SYSTEMS AND METHODS FOR SUPERCONDUCTING INTEGRATED CIRCUITS - A superconducting integrated circuit may include a magnetic flux transformer having an inner inductive coupling element and an outer inductive coupling element that surrounds the inner inductive coupling element along at least a portion of a length thereof. The magnetic flux transformer may have a coaxial-like geometry such that a mutual inductance between the first inductive coupling element and the second inductive coupling element is sub-linearly proportional to a distance that separates the first inner inductive coupling element from the first outer inductive coupling element. At least one of the first inductive coupling element and the second inductive coupling element may be coupled to a superconducting programmable device, such as a superconducting qubit. | 07-21-2011 |
20120005456 | SYSTEMS, METHODS AND APPARATUS FOR LOCAL PROGRAMMING OF QUANTUM PROCESSOR ELEMENTS - Systems, methods and apparatus for a scalable quantum processor architecture. A quantum processor is locally programmable by providing a memory register with a signal embodying device control parameter(s), converting the signal to an analog signal; and administering the analog signal to one or more programmable devices. | 01-05-2012 |
20120094838 | SYSTEMS, METHODS AND APPARATUS FOR DIGITAL-TO-ANALOG CONVERSION OF SUPERCONDUCTING MAGNETIC FLUX SIGNALS - A superconducting flux digital-to-analog converter includes a superconducting inductor ladder circuit. The ladder circuit includes a plurality of closed superconducting current paths that each includes at least two superconducting inductors coupled in series to form a respective superconducting loop, successively adjacent or neighboring superconducting loops are connected in parallel with each other and share at least one of the superconducting inductors to form a flux divider network. A data signal input structure provides a respective bit of a multiple bit signal to each of the superconducting loops. The data signal input structure may include a set of superconducting quantum interference devices (SQUIDs). The data signal input structure may include a superconducting shift register, for example a single-flux quantum (SFQ) shift register or a flux-based superconducting shift register comprising a number of latching qubits. | 04-19-2012 |
20130313526 | SYSTEMS, METHODS AND APPARATUS FOR ACTIVE COMPENSATION OF QUANTUM PROCESSOR ELEMENTS - Apparatus and methods enable active compensation for unwanted discrepancies in the superconducting elements of a quantum processor. A qubit may include a primary compound Josephson junction (CJJ) structure, which may include at least a first secondary CJJ structure to enable compensation for Josephson junction asymmetry in the primary CJJ structure. A qubit may include a series LC-circuit coupled in parallel with a first CJJ structure to provide a tunable capacitance. A qubit control system may include means for tuning inductance of a qubit loop, for instance a tunable coupler inductively coupled to the qubit loop and controlled by a programming interface, or a CJJ structure coupled in series with the qubit loop and controlled by a programming interface. | 11-28-2013 |
20140246763 | SYSTEMS AND METHODS FOR TESTING AND PACKAGING A SUPERCONDUCTING CHIP - Superconductive interconnection structures providing continuous, uninterrupted superconducting signal paths between a superconducting chip and a superconducting chip carrier are described. The superconductive interconnection structures employ superconducting solder bumps and pillars of Under Bump Metal (“UBM”). The superconductive interconnection structures are employed in a two-stage solder bumping process in which the superconducting chip is first bonded to a testing module for screening and then bonded to a chip packaging module for operation. Either the testing module or the chip packaging module, or both, may include a multi-chip module for carrying multiple superconducting chips simultaneously. | 09-04-2014 |
20150032994 | SYSTEMS AND METHODS FOR IMPROVING THE PERFORMANCE OF A QUANTUM PROCESSOR BY REDUCING ERRORS - Techniques for improving the performance of a quantum processor are described. Some techniques employ improving the processor topology through design and fabrication, reducing intrinsic/control errors, reducing thermally-assisted errors and methods of encoding problems in the quantum processor for error correction. | 01-29-2015 |