公开(公告)号：US11444233B1

公开(公告)日：2022-09-13

申请号：US17219260

申请日：2021-03-31

申请人： Melissa G. Loving

发明人： Melissa G. Loving

IPC分类号： H01L39/02 ,  G11C11/44 ,  H01L27/18 ,  H01L39/22 ,  H01L39/12

摘要： A hysteretic magnetic Josephson junction (HMJJ) device is provided that comprises a non-magnetic spacer disposed between a first ferromagnetic layer and a second ferromagnetic layer, a first ferrimagnetic layer having a first side disposed on a side of the first ferromagnetic layer opposite the non-magnetic spacer, and a second ferrimagnetic layer having a first side disposed on a side of the second ferromagnetic layer opposite the non-magnetic spacer. The first ferrimagnetic layer and the second ferrimagnetic layer are formed from a composition that provides orthogonally magnetic responses relative to the magnetic responses of the first ferromagnetic layer and the second ferromagnetic layer. The HMJJ further comprises a first superconducting material layer having a first side disposed on a second side of the first ferromagnetic layer and a second superconducting material layer having a first side disposed on a second side of the second ferromagnetic layer.

公开(公告)号：US20220286137A1

公开(公告)日：2022-09-08

申请号：US17634551

申请日：2021-03-22

申请人： SHANGHAI INSTITUTE OF MICROSYSTEM AND INFORMATION TECHNOLOGY CHINESE ACADEMY OF SCIENCES

发明人： JIE REN ,  RUO TING YANG ,  XIAO PING GAO ,  ZHEN WANG

IPC分类号： H03K19/195 ,  H01L27/18 ,  H01L39/22 ,  H01L39/02

摘要： A superconducting integrated circuit design method based on placement and routing by different-layer JTLs comprises: cutting a bias line at a cell data interface of a cell library, and reserving a position of a via; placing and arranging cells on a logic cell layer according to a schematic circuit logic diagram; connecting clock lines of each of the cells by using a JTL and a splitter of the logic cell layer; and performing data connection on each of the cells by using JTLs of a transverse JTL routing layer and a longitudinal JTL routing layer which are not in the same layer as the logic cell layer, wherein the JTL of the transverse JTL routing layer is used as a transverse routing cell for data between the cells, the JTL of the longitudinal JTL routing layer is used as a longitudinal routing cell for data between the cells.

公开(公告)号：US20220261680A1

公开(公告)日：2022-08-18

申请号：US17626967

申请日：2020-06-26

申请人： NEC Corporation

发明人： Masahiro HASEGAWA ,  Tsuyoshi YAMAMOTO ,  Yoshihoto HASHIMOTO

IPC分类号： G06N10/40 ,  H01L27/18 ,  H03K17/92

摘要： A superconducting circuit and a quantum computer capable of implementing four-body interaction while reducing an amount of hardware are provided. A superconducting circuit (1) includes four superconducting qubit circuits (10), a coupling circuit (20) inductively coupled to the four superconducting qubit circuits (10). Each of the superconducting qubit circuits (10) indicates a qubit by being in a first phase state or a second phase state, when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an even number, an interaction term of Hamiltonian of the superconducting circuit (1) takes a first value, and when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an odd number, the interaction term takes a second value.

公开(公告)号：US20220181537A1

公开(公告)日：2022-06-09

申请号：US17406243

申请日：2021-08-19

申请人： IQM Finland Oy

发明人： Juha Hassel ,  Vasilii Sevriuk ,  Johannes Heinsoo ,  Kuan Yen Tan ,  Mikko Möttönen ,  Hao Hsu

IPC分类号： H01L39/22 ,  H01L27/18 ,  G06N10/00

摘要： It is an objective to provide an arrangement and a quantum computing system for qubit readout. According to an embodiment, an arrangement for qubit readout includes at least one qubit and a controllable energy relaxation structure comprising at least one junction. The controllable energy relaxation structure is coupled to the at least one qubit, and is configured to absorb, in response to a control signal, at least one photon from the at least one qubit via photon-assisted tunnelling of a charge through the at least one junction. The arrangement also includes a charge storage configured to store the tunnelled charge and a charge sensing structure coupled to the charge storage. The charge sensing structure is configured to provide a readout signal in response to detecting the tunnelled charge in the charge storage.

公开(公告)号：US11349060B2

公开(公告)日：2022-05-31

申请号：US16905519

申请日：2020-06-18

申请人： International Business Machines Corporation

发明人： Patryk Gumann ,  Salvatore Bernardo Olivadese ,  Jerry M. Chow

IPC分类号： H01L29/06 ,  H01L39/04 ,  H01L27/18 ,  H01L39/02 ,  G06N10/00 ,  H01L39/24

摘要： A device includes a first substrate formed of a first material that exhibits a threshold level of thermal conductivity. The threshold level of thermal conductivity is achieved at a cryogenic temperature range in which a quantum circuit operates. In an embodiment, the device also includes a second substrate disposed in a recess of the first substrate, the second substrate formed of a second material that exhibits a second threshold level of thermal conductivity. The second threshold level of thermal conductivity is achieved at a cryogenic temperature range in which a quantum circuit operates. In an embodiment, at least one qubit is disposed on the second substrate. In an embodiment, the device also includes a transmission line configured to carry a microwave signal between the first substrate and the second substrate.

公开(公告)号：US11342491B2

公开(公告)日：2022-05-24

申请号：US17035147

申请日：2020-09-28

申请人： Thomas F. Ambrose ,  Melissa G. Loving ,  Alastair Charlie Fisher

发明人： Thomas F. Ambrose ,  Melissa G. Loving ,  Alastair Charlie Fisher

IPC分类号： H01L39/02 ,  H01L27/18 ,  H01L39/24 ,  H01L39/22 ,  H01L39/12

摘要： One example includes a magnetic Josephson junction (MJJ) system. The system includes a first superconducting material layer and a second superconducting material layer each configured respectively as a galvanic contacts. The system also includes a ferrimagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a fixed net magnetic moment at a predetermined operating temperature of the MJJ system. The system also includes a ferromagnetic material layer arranged between the first and second superconducting material layers and that is configured to exhibit a variable magnetic orientation in response to an applied magnetic field. The MJJ system can be configured to store a binary logical value based on a direction of the variable magnetic orientation of the ferromagnetic material layer. The system further includes a spacer layer arranged between the ferromagnetic and the ferrimagnetic material layers.

公开(公告)号：US11327344B2

公开(公告)日：2022-05-10

申请号：US16445332

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： H01L29/06 ,  G02F1/017 ,  B82Y10/00 ,  G06N10/00 ,  H01L29/12 ,  H01L29/66 ,  H03K19/195 ,  B82Y15/00 ,  G06F1/20 ,  G06F11/07 ,  G06F15/16 ,  G06N99/00 ,  G11C19/32 ,  H01L21/02 ,  H01L27/088 ,  H01L27/18 ,  H01L29/15 ,  H01L29/417 ,  H01L33/04 ,  H01L39/22 ,  H03M1/34 ,  H03M1/66 ,  H03K3/38 ,  H03M13/15

摘要： Novel and useful quantum structures having a continuous well with control gates that control a local depletion region to form quantum dots. Local depleted well tunneling is used to control quantum operations to implement quantum computing circuits. Qubits are realized by modulating gate potential to control tunneling through local depleted region between two or more sections of the well. Complex structures with a higher number of qdots per continuous well and a larger number of wells are fabricated. Both planar and 3D FinFET semiconductor processes are used to build well to gate and well to well tunneling quantum structures. Combining a number of elementary quantum structure, a quantum computing machine is realized. An interface device provides an interface between classic circuitry and quantum circuitry by permitting tunneling of a single quantum particle from the classic side to the quantum side of the device. Detection interface devices detect the presence or absence of a particle destructively or nondestructively.

公开(公告)号：US11289590B1

公开(公告)日：2022-03-29

申请号：US16773921

申请日：2020-01-27

申请人： PsiQuantum Corp.

发明人： Faraz Najafi ,  Qiaodan Jin Stone ,  Andrea Bahgat Shehata

IPC分类号： H01L29/868 ,  H01L29/66 ,  H01L29/861 ,  H01L23/34 ,  H01L27/18 ,  H01L31/09 ,  H01L39/16 ,  H01L31/107

摘要： The various embodiments described herein include methods, devices, and systems for fabricating and operating diodes. In one aspect, an electrical circuit includes: (1) a diode component having a particular energy band gap; (2) an electrical source electrically coupled to the diode component and configured to bias the diode component in a particular state; and (3) a heating component thermally coupled to a junction of the diode component and configured to selectively supply heat corresponding to the particular energy band gap.

公开(公告)号：US11238000B2

公开(公告)日：2022-02-01

申请号：US16863623

申请日：2020-04-30

申请人： Google LLC

发明人： Masoud Mohseni ,  Hartmut Neven

IPC分类号： G06F13/40 ,  G06N10/00 ,  H03K19/195 ,  H01L27/18 ,  H01L39/22 ,  G06F15/80 ,  H01L39/02 ,  H01P5/08

摘要： An apparatus includes a substrate, a classical computing processor formed on the substrate, a quantum computing processor formed on the substrate, and one or more coupling components between the classical computing processor and the quantum computing processor, the one or more coupling components being formed on the substrate and being configured to allow data exchange between the classical computing processor and the quantum computing processor.

公开(公告)号：US20210399192A1

公开(公告)日：2021-12-23

申请号：US16908704

申请日：2020-06-22

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Douglas Max Gill ,  Martin O. Sandberg ,  Vivekananda P. Adiga ,  Yves Martin ,  Hanhee Paik

IPC分类号： H01L39/02 ,  H01L39/22 ,  H01L39/24 ,  H01L27/18

摘要： A method for improving lifetime and coherence time of a qubit in a quantum mechanical device is provided. The method includes providing a substrate having a frontside and a backside, the frontside having at least one qubit formed thereon, the at least one qubit having capacitor pads. The method further includes at least one of removing an amount of substrate material from the backside of the substrate at an area opposite the at least one qubit or depositing a superconducting metal layer at the backside of the substrate at the area opposite the at least one qubit to reduce radiofrequency electrical current loss due to at least one of silicon-air (SA) interface, metal-air (MA) interface or silicon-metal (SM) interface so as to enhance a lifetime (T1) and a coherence time (T2) in the at least one qubit.