公开(公告)号：US10902908B2

公开(公告)日：2021-01-26

申请号：US16933356

申请日：2020-07-20

申请人： NORTHROP GRUMMAN SYSTEMS CORPORATION

发明人： Quentin P. Herr ,  Anna Y. Herr

IPC分类号： G11C11/44 ,  B82Y10/00 ,  H01L39/22 ,  H03K3/38 ,  H03K19/195

摘要： A Josephson memory array and logic circuits use quasi-long-Josephson-junction interconnects to propagate signals at fast speeds and low energy expense, while permitting for memory arrays as dense fabrics of relatively simple unit cell sub-circuits, which include π Josephson junctions, connected together by the interconnects. Each of the unit cell sub-circuits can be configured as a looped or linear arrangement. The unit cell sub-circuits and interconnects provide a fast, dense memory technology for reciprocal quantum logic (RQL), suitable for low-level caches and other memories collocated with an RQL processor.

公开(公告)号：US10892761B1

公开(公告)日：2021-01-12

申请号：US16822707

申请日：2020-03-18

申请人： Alexander Louis Braun

发明人： Alexander Louis Braun

IPC分类号： H03K19/195 ,  H03K19/20 ,  H03K3/38 ,  H03K19/21 ,  G06N10/00

摘要： A reciprocal quantum logic (RQL) wave-pipeline logic (WPL) inverting gate includes a Josephson junction-based comparator that corrects a design weakness present in other RQL WPL inverting gates that can lead to the propagation of glitches under certain timing conditions. With selective placement of pulse generators at the inputs, the RQL WPL inverting gate can be used to construct A AND (B XOR C) gates, XOR gates, NOT gates, and A-AND-NOT-B gates.

公开(公告)号：US10850978B2

公开(公告)日：2020-12-01

申请号：US16446294

申请日：2019-06-19

申请人： equal1.labs Inc.

发明人： Dirk Robert Walter Leipold ,  George Adrian Maxim ,  Michael Albert Asker

IPC分类号： B82Y10/00 ,  G02F1/017 ,  G06N10/00 ,  H01L29/12 ,  H01L29/66 ,  H03K19/195

摘要： A novel and useful controlled quantum shift register for transporting particles from one quantum dot to another in a quantum structure. The shift register incorporates a succession of qdots with tunneling paths and control gates. Applying appropriate control signals to the control gates, a particle or a split quantum state is made to travel along the shift register. The shift register also includes ancillary double interaction where two pairs of quantum dots provide an ancillary function where the quantum state of one pair is replicated in the second pair. The shift register also provides bifurcation where an access path is split into two or more paths. Depending on the control pulse signals applied, quantum dots are extended into multiple paths. Control of the shift register is provided by electric control pulses. An optional auxiliary magnetic field provides additional control of the shift register.

公开(公告)号：US10811587B2

公开(公告)日：2020-10-20

申请号：US15425966

申请日：2017-02-06

申请人： Microsoft Technology Licensing, LLC

发明人： Alexander L Braun

IPC分类号： H03K3/38 ,  H01L39/22 ,  H01L27/18 ,  G06N10/00 ,  G11C19/32 ,  H03K19/195

摘要： Josephson transmission lines (JTLs) for superconducting devices and related methods are provided. In one example, a device comprising a JTL for propagating quantum pulses in a first direction in response to an application of a clock signal having a plurality of phases is provided. The JTL may include a first inductive element coupled between a first terminal and a second terminal, a first Josephson junction (JJ) coupled between the second terminal and a ground terminal, a second inductive element coupled between the second terminal and a third terminal, and a second JJ coupled between the third terminal and the ground terminal. The second inductive element is configured to form an inductive loop, and the inductive loop may be configured to operate in a mode such that a quantum pulse cannot travel in a second direction opposite from the first direction regardless of a phase of the clock signal.

公开(公告)号：US20200280317A1

公开(公告)日：2020-09-03

申请号：US16805047

申请日：2020-02-28

申请人： ANYON SYSTEMS INC.

发明人： Alireza NAJAFI-YAZDI ,  Gabriel ETHIER-MAJCHER

IPC分类号： H03K19/195 ,  G06N10/00 ,  G11C11/44

摘要： There is described a microwave device and methods of operating same. The device comprises at least one superconducting qubit coupled to a transmission line defining a first port, and a filter. The filter comprises a first resonant element having a first resonance frequency f1, positioned along the transmission line between the first port and the qubit, and a second resonant element having a second resonance frequency f2 different from f1 and positioned along the transmission line between the first resonant element and the qubit.

公开(公告)号：US20200280316A1

公开(公告)日：2020-09-03

申请号：US16783603

申请日：2020-02-06

申请人： Rigetti & Co, Inc.

发明人： Matthew J. Reagor ,  Chad Tyler Rigetti ,  Eyob A. Sete

IPC分类号： H03K19/195 ,  G06N10/00

摘要： In a general aspect, a qubit device includes two circuit loops. In some aspects, a first circuit loop includes a first Josephson junction, a second circuit loop includes a second Josephson junction, and the first and second loops are configured to receive a magnetic flux that defines a transition frequency of a qubit device. In some aspects, a quantum integrated circuit includes an inductor connected between a first circuit node and a second circuit node; the first Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node; and the second Josephson junction connected in parallel with the inductor between the first circuit node and the second circuit node.

公开(公告)号：US20200274526A1

公开(公告)日：2020-08-27

申请号：US15931644

申请日：2020-05-14

申请人： Quantum Machines

发明人： Yonatan Cohen ,  Nissim Ofek ,  Itamar Sivan

IPC分类号： H03K3/38 ,  G06N10/00 ,  H03K19/195

摘要： A system comprises an electromagnetic pulse generation system that comprises a first pulse generation circuit, a second pulse generation circuit, and a mixing circuit. The electromagnetic pulse generation system is operable to output a first pulse generated by the first pulse generation circuit onto a first signal path, output a second pulse generated by the second pulse generation circuit onto the first signal path, generate a third pulse by mixing, via the mixing circuit, a fourth pulse generated by the first pulse generation circuit and a fifth pulse generated by the second pulse generation circuit, and output the third pulse on the first signal path.

公开(公告)号：US10749095B2

公开(公告)日：2020-08-18

申请号：US16690190

申请日：2019-11-21

申请人： David George Ferguson ,  Anthony Joseph Przybysz ,  Joel D. Strand

发明人： David George Ferguson ,  Anthony Joseph Przybysz ,  Joel D. Strand

IPC分类号： H03K19/195 ,  H01L39/02 ,  G06N10/00

摘要： Systems and methods are provided for a ZZZ coupler. A first tunable coupler is coupled to the first qubit and tunable via a first control signal. A second tunable coupler is coupled to the first tunable coupler to direct a flux of the first qubit into a tuning loop of the second tunable coupler, such that when a first coupling strength associated with the first tunable coupler is non-zero, a second coupling strength, associated with the second tunable coupler, is a function of a second control signal applied to the second tunable coupler and a state of the first qubit. The second qubit and the third qubit are coupled to one another through the second tunable coupler, such that, when the second coupling strength is non-zero it is energetically favorable for the states of the first and second qubits to assume a specific relationship with respect to the Z-axis.

公开(公告)号：US10726351B1

公开(公告)日：2020-07-28

申请号：US16265867

申请日：2019-02-01

申请人： Wisconsin Alumni Research Foundation

发明人： Kangbo Li ,  Robert Francis McDermott, III ,  Maxim George Vavilov

IPC分类号： H03K19/19 ,  G06N10/00 ,  H03K19/195 ,  B82Y10/00

摘要： A system and method for controlling superconducting qubits is provided. In some aspects the method includes assembling, using a controller of a quantum computing system, a pulse subsequence that comprises pairs of voltage pulses timed symmetrically with respect to a period corresponding to a qubit frequency of a superconducting qubit in the quantum computing system. The method also includes generating, using the controller, a pulse sequence using a repetition of a pulse subsequence. The method further includes controlling the superconducting qubit by applying the pulse sequence to the superconducting qubit using a single flux quantum (“SFQ”) driver coupled thereto.

公开(公告)号：US20200227617A1

公开(公告)日：2020-07-16

申请号：US16641235

申请日：2018-08-23

申请人： CONSIGLIO NAZIONALE DELLE RICERCHE ,  CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC) ,  UNIVERSIDAD DEL PAÍS VASCO (UPV)

发明人： Francesco GIAZOTTO ,  Elia STRAMBINI ,  Giorgio DE SIMONI ,  F. Sebastian BERGERET SBARBARO

IPC分类号： H01L39/22 ,  G11C11/44 ,  G11C11/16 ,  H03K19/195 ,  H01L39/12

摘要： A superconducting logic element includes a superconducting tunnel junction including first and second superconductors. First and second insulating ferromagnets in contact with the first and second superconductors, respectively, generate by magnetic proximity effect a predetermined density of spin-split states in the first and second superconductors, respectively. A writing element applies a writing current to at least a superconductor and is in contact with one of the first or second insulating ferromagnets, so that the first and second insulating ferromagnets commute, by the magnetic field generated by the applied writing current, between a state with parallel magnetization to a state with antiparallel magnetization with respect to each other. The superconducting tunnel junction includes the first or second superconductor between which an insulating layer is arranged with tunnel barrier function, the insulating layer selected between a layer selected from the group consisting of AlOx, AlN, and the first or second insulating ferromagnet.