公开(公告)号：US11629995B2

公开(公告)日：2023-04-18

申请号：US17705204

申请日：2022-03-25

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Eric Dudley ,  Mark Thompson

IPC: G01J1/44 ,  G01J1/04

Abstract: A method of resolving a number of photons received by a photon detector includes optically coupling a waveguide to a superconducting wire having alternating narrow and wide portions; electrically coupling the superconducting wire to a current source; and electrically coupling an electrical contact in parallel with the superconducting wire. The electrical contact has a resistance less than a resistance of the superconducting wire while at least one narrow portion of the superconducting wire is in a non-superconducting state. The method includes providing to the superconducting wire, from the current source, a current configured to maintain the superconducting wire in a superconducting state in the absence of incident photons; receiving one or more photons via the waveguide; measuring an electrical property of the superconducting wire, proportional to a number of photons incident on the superconducting wire; and determining the number of received photons based on the electrical property.

公开(公告)号：US11621714B2

公开(公告)日：2023-04-04

申请号：US17486615

申请日：2021-09-27

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi

IPC: H03K19/195 ,  H03K19/20 ,  H01L23/552 ,  H01L39/16 ,  H01L27/18 ,  H01L39/22 ,  H01L31/02 ,  H03K19/23 ,  H01L39/18

Abstract: An electric circuit includes a plurality of superconducting components, each of the plurality of superconducting components having: a respective first terminal; a respective second terminal; and a respective input. The electric circuit further includes a bias current source electrically-connected to the respective first terminal of each of the plurality of superconducting components. The bias current source is configured to provide a bias current adapted to cause the electric circuit to function as a logical OR gate on the respective inputs of the plurality of superconducting components. The electric circuit further includes an output node adapted to output a state of the logical OR gate.

公开(公告)号：US11601127B2

公开(公告)日：2023-03-07

申请号：US17160283

申请日：2021-01-27

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi

IPC: H03K19/195 ,  H03K19/17784 ,  H03K19/17736 ,  H03K19/17728

Abstract: The various embodiments described herein include methods, devices, and systems for operating superconducting circuitry. In one aspect, a programmable circuit includes: (1) a superconducting component arranged in a multi-dimensional array of alternating narrow and wide portions, the superconducting component having an input terminal at a first end and an output terminal at a second end opposite of the first end; and (2) control circuitry coupled to the narrow portions of the superconducting component, the control circuitry configured to transition the narrow portions between superconducting and non-superconducting states. In some implementations, the superconducting component and the control circuitry are formed on different layers of the programmable circuit.

公开(公告)号：US20230055589A1

公开(公告)日：2023-02-23

申请号：US17967778

申请日：2022-10-17

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi

IPC: G11C11/44 ,  H01L39/16 ,  H01L27/18 ,  H01L39/08 ,  H01L39/10

Abstract: An electronic device includes a substrate and a layer of superconducting material disposed over the substrate. The layer of superconducting material includes a first wire and a loop that is (1) distinct and separate from the first wire and (ii) capacitively coupled to the first wire while the loop and the first wire are in a superconducting state.

公开(公告)号：US11441941B2

公开(公告)日：2022-09-13

申请号：US17232086

申请日：2021-04-15

Applicant: PsiQuantum Corp

Inventor： Chia-Jung Chung ,  Faraz Najafi ,  George Kovall ,  Vitor R. Manfrinato ,  Vimal Kamineni ,  Mark Thompson ,  Syrus Ziai

IPC: G01J1/02 ,  G01J1/44 ,  H01B12/06

Abstract: A superconductor device is manufactured by depositing a barrier layer over a substrate including silicon, the barrier layer including silicon and nitrogen; depositing a seed layer for a superconductor layer over the barrier layer, the seed layer including aluminum and nitrogen; depositing the superconductor layer over the seed layer, the superconductor layer including a layer of a superconductor material, the barrier layer serving as an oxidation barrier between the layer superconductor material and the substrate; and depositing a silicon cap layer over the superconductor layer. In some embodiments, the superconductor device includes a waveguide and a metal contact at a sufficient distance from the waveguide to prevent optical coupling between the metal contact and the waveguide.

公开(公告)号：US11289590B1

公开(公告)日：2022-03-29

申请号：US16773921

申请日：2020-01-27

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Qiaodan Jin Stone ,  Andrea Bahgat Shehata

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

Abstract: 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：US20210384126A1

公开(公告)日：2021-12-09

申请号：US17408309

申请日：2021-08-20

Applicant: PsiQuantum Corp

Inventor： Faraz Najafi ,  Vitor Riseti Manfrinato

IPC: H01L23/528 ,  H01L27/18 ,  H01L39/08

Abstract: A superconducting circuit includes a first component having a first connection point. The first connection point has a first width. The superconducting circuit includes a second component having a second connection point. The second connection point has a second width that is larger than the first width. The superconducting circuit includes a superconducting connector shaped to reduce current crowding. The superconducting connector electrically connects the first connection point and the second connection point. The superconducting connector includes a first taper positioned adjacent the first connection point and having a non-linear shape and a second taper positioned adjacent the second connection point.

公开(公告)号：US11101215B2

公开(公告)日：2021-08-24

申请号：US16575274

申请日：2019-09-18

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Vitor Riseti Manfrinato

IPC: H01L23/528 ,  H01L39/08 ,  H01L27/18 ,  H01L23/532 ,  H01L39/12 ,  H01L39/10

Abstract: The various embodiments described herein include methods, devices, and circuits for reducing or minimizing current crowding effects in manufactured superconductors. In some embodiments, a superconducting circuit includes: (1) a first component having a first connection point, the first connection point having a first width; (2) a second component having a second connection point, the second connection point having a second width that is larger than the first width; and (3) a connector electrically connecting the first connection point and the second connection point, the connector including: (a) a first taper having a first slope and a non-linear shape; (b) a second taper having a second slope; and (c) a connecting portion connecting the first taper to the second taper, the connecting portion having a third slope that is less than the first slope and less than the second slope.

公开(公告)号：US20210249583A1

公开(公告)日：2021-08-12

申请号：US17240965

申请日：2021-04-26

Applicant: PsiQuantum Corp. ,  Government of the United States of America, as Represented by the Secretary of Commerce

Inventor： Faraz Najafi ,  Qiaodan Jin Stone ,  Adam Nykoruk McCaughan

IPC: H01L39/16 ,  H01L39/10 ,  H01F6/04

Abstract: The various embodiments described herein include methods, devices, and systems for operating superconducting circuits. In one aspect, an electric circuit includes: (1) a superconductor component having a first terminal at a first end and a second terminal at a second end; (2) a gate component thermally-coupled to the superconductor component at a first location between the first terminal and the second terminal, where the gate component is thermally-coupled via a first section of the gate component; and where the gate component has a smallest width at the first section so as to focus resistive heating toward the superconductor component.

公开(公告)号：US20210190584A1

公开(公告)日：2021-06-24

申请号：US16985137

申请日：2020-08-04

Applicant: PsiQuantum Corp.

Inventor： Mark Thompson ,  Faraz Najafi

IPC: G01J1/44 ,  G01J1/04 ,  H01L39/10 ,  G02B6/42

Abstract: The various embodiments described herein include methods, devices, and systems for fabricating and operating superconducting photon detectors. In one aspect, a photon detector includes: (1) a first waveguide configured to guide photons from a photon source; (2) a second waveguide that is distinct and separate from the first waveguide and optically-coupled to the first waveguide; and (3) a superconducting component positioned adjacent to the second waveguide and configured to detect photons within the second waveguide.