公开(公告)号：US10897235B2

公开(公告)日：2021-01-19

申请号：US16553068

申请日：2019-08-27

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Syrus Ziai ,  Qiaodan Jin Stone

IPC: H01L27/18 ,  H01L39/16 ,  H03F19/00 ,  H01L39/12

Abstract: A system includes a first superconducting wire and a second superconducting wire connected in parallel. The system includes a first current source coupled to the first superconducting wire and configured to supply a first current in response to a trigger event. The system includes a second current source coupled in series with the parallel combination of the first superconducting wire and the second superconducting wire and configured to supply a second current. The superconducting wires are configured to, while receiving the second current, operate in a superconducting state in the absence of the first current. The first superconducting wire is configured to, while receiving the second current, transition to a non-superconducting state in response to the first current. The second superconducting wire is configured to, while receiving the second current, transition to a non-superconducting state in response to the first superconducting wire transitioning to the non-superconducting state.

公开(公告)号：US20200350483A1

公开(公告)日：2020-11-05

申请号：US16547471

申请日：2019-08-21

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Syrus Ziai

IPC: H01L39/08 ,  H01L39/14 ,  H01L29/861 ,  H01L39/24 ,  H01L39/06 ,  H01L39/16

Abstract: An electronic device (e.g., a diode) is provided that includes a substrate and a patterned layer of superconducting material disposed over the substrate. The patterned layer forms a first electrode, a second electrode, and a loop coupling the first electrode with the second electrode by a first channel and a second channel. The first channel and the second channel have different minimum widths. For a range of current magnitudes, when a magnetic field is applied to the patterned layer of superconducting material, the conductance from the first electrode to the second electrode is greater than the conductance from the second electrode to the first electrode.

公开(公告)号：US20200333179A1

公开(公告)日：2020-10-22

申请号：US16849829

申请日：2020-04-15

Applicant: PsiQuantum Corp,

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

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

Abstract: A superconductor device according to some embodiments comprises a superconductor stack, which includes a superconductor layer and a silicon cap layer over the superconductor layer, the cap layer including amorphous silicon. The superconductor device further comprises a metal contact over a portion of the silicon cap layer and electrically-coupled to the superconductor layer. The metal contact comprises a core including a first metal, and an outer layer around the core that includes a second metal. The portion of the silicon cap layer is converted from silicon to a conductive compound including the second metal to provide low-resistance electrical coupling between the superconductor layer and the metal contact. The superconductor device further comprises a waveguide, and the first portion of the cap layer under the metal contact is at a sufficient lateral distance from the waveguide to prevent optical coupling between the metal contact and the waveguide.

公开(公告)号：US20200080890A1

公开(公告)日：2020-03-12

申请号：US16544718

申请日：2019-08-19

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Syrus Ziai

IPC: G01J1/44 ,  H01L31/08 ,  H01L29/02 ,  G01J1/42 ,  G01J1/04

Abstract: An electronic device includes a first superconducting wire (with a first end and a second end) having a first threshold superconducting current. The device includes a second superconducting wire (with a first end and a second end) having a second threshold superconducting current that is less than the first threshold superconducting current. The second end of the first superconducting wire and the second end of the second superconducting wire are coupled to a common voltage node. A resistor is coupled between the first superconducting wire and the second superconducting wire, with a first end of the resistor coupled to the first end of the first superconducting wire and a second end of the resistor coupled to the first end of the second superconducting wire. The device includes a current source coupled with the first superconducting wire, and coupled with a combination of the resistor and the second superconducting wire.

公开(公告)号：US20200066962A1

公开(公告)日：2020-02-27

申请号：US16107143

申请日：2018-08-21

Applicant: PSIQuantum Corp.

Inventor： Faraz Najafi

IPC: H01L39/10 ,  H01L39/12 ,  H01L39/16 ,  H01L39/24

Abstract: The various embodiments described herein include methods, devices, and systems for fabricating and operating superconducting switch devices. In one aspect, an electrical circuit includes: (1) a switch device configured to switch between an on state and an off state in response to a first voltage, the switch device comprising: (a) a superconductor layer adapted to transition from a superconducting state to an insulating state in response to a first strain; and (b) a piezoelectric layer positioned adjacent to the superconductor layer, the piezoelectric layer configured to apply the first strain to the superconductor layer in response to the first voltage; (2) a voltage source electrically coupled to the piezoelectric layer of the switch device and configured to supply the first voltage; and (3) an output component coupled to the superconductor layer of the switch device.

公开(公告)号：US10566516B2

公开(公告)日：2020-02-18

申请号：US16046815

申请日：2018-07-26

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi

IPC: H01L39/10 ,  H01L31/113 ,  H01L39/16 ,  G01J1/44 ,  H01L31/0224 ,  H01L29/43 ,  H01L29/786 ,  H01L39/14

Abstract: The various implementations described herein include methods, devices, and systems for detecting light. In one aspect, a photodetector device includes: a superconducting wire, and a transistor that includes a semiconducting component and a superconducting component. The superconducting wire is electrically coupled to the superconducting component. The semiconducting component is located adjacent to the superconducting component. The superconducting component is configured to, in response to receiving an input current exceeding a current threshold, transition from a superconducting state to a non-superconducting state and generate heat sufficient to increase a temperature of the semiconducting component from a temperature below a semiconducting threshold temperature to a temperature above the semiconducting threshold temperature.

公开(公告)号：US10396733B2

公开(公告)日：2019-08-27

申请号：US16028288

申请日：2018-07-05

Applicant: PsiQuantum Corp.

Inventor： Faraz Najafi ,  Syrus Ziai ,  Qiaodan Jin Stone

IPC: H01L27/18 ,  H01L39/16 ,  H03F19/00 ,  H01L39/12

Abstract: The various embodiments described herein include methods, devices, and systems for fabricating and operating superconducting circuitry. In one aspect, an electronic system includes: (1) a first circuit that includes a plurality of superconducting wires connected in parallel with one another, the plurality of superconducting wires including: (a) a first superconducting wire with a corresponding first threshold superconducting current; and (b) a second superconducting wire; (2) a second circuit connected in parallel to the first circuit; (3) a first current source coupled to the first superconducting wire and configured to selectively supply a first current; and (4) a second current source coupled to a combination of the first circuit and the second circuit and configured to supply a second current such that the plurality of superconducting wires operate in a superconducting state; where a combination of the first current and the second current exceeds the first threshold superconducting current.

公开(公告)号：US10386229B2

公开(公告)日：2019-08-20

申请号：US16028293

申请日：2018-07-05

Applicant: PsiQuantum Corp

Inventor： Faraz Najafi ,  Syrus Ziai

IPC: G01J1/42 ,  G01J1/44 ,  G01J1/04 ,  H01L31/08 ,  H01L29/02

Abstract: The various embodiments described herein include methods, devices, and systems for fabricating and operating photodetector circuitry. In one aspect, a photon detector system includes: (1) a first superconducting wire having a first threshold superconducting current; (2) a second superconducting wire having a second threshold superconducting current; (3) a resistor coupled to the first wire and the second wire; (4) current source(s) coupled to the first wire and configured to supply a current that is below the second threshold current; and (3) a second circuit coupled to the second wire. In response to receiving light at the first wire, the first wire transitions from a superconducting state to a non-superconducting state. In response to receiving light at the second wire while the first wire is in the non-superconducting state, the second wire transitions to a non-superconducting state, redirecting the first current to the second circuit.

公开(公告)号：US10361703B2

公开(公告)日：2019-07-23

申请号：US16151180

申请日：2018-10-03

Applicant: PSIQUANTUM Corp.

Inventor： Faraz Najafi

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

Abstract: The various embodiments described herein include methods, devices, and systems for implementing logic gates. In one aspect, a circuit includes: (1) superconducting components; (2) heat sources, each coupled to a corresponding superconducting component and configured to selectively provide heat to that component; and (3) a current source coupled to the superconducting components and configured to selectively provide: (a) a first current to bias the components such that combination of the first current and heat from any heat source causes the components to transition to a non-superconducting state; and (b) a second current to bias the components such that (i) combination of the second current and heat from each heat source causes the components to transition to the non-superconducting state, and (ii) a combination of the second current and heat from only a subset of the heat sources does not cause the components to transition to the non-superconducting state.

公开(公告)号：US20190140157A1

公开(公告)日：2019-05-09

申请号：US16182513

申请日：2018-11-06

Applicant: PSIQUANTUM CORP

Inventor： Faraz Najafi ,  Syrus Ziai

IPC: H01L39/08 ,  H01L39/14 ,  H01L39/06 ,  H01L39/24 ,  H01L29/861

CPC classification number: H01L39/08 ,  H01L29/861 ,  H01L39/06 ,  H01L39/14 ,  H01L39/16 ,  H01L39/24

Abstract: An electronic device (e.g., a diode) is provided that includes a substrate and a patterned layer of superconducting material disposed over the substrate. The patterned layer forms a first electrode, a second electrode, and a loop coupling the first electrode with the second electrode by a first channel and a second channel. The first channel and the second channel have different minimum widths. The device further includes a magnet that applies a magnetic field to the loop, which produces an expulsion current in the loop that travels toward the second electrode in the first channel and toward the first electrode in the second channel. For a range of current magnitudes, when the magnetic field is applied to the patterned layer of superconducting material, the conductance from the first electrode to the second electrode is greater than the conductance from the second electrode to the first electrode.