PHOTODETECTOR WITH SUPERCONDUCTOR NANOWIRE TRANSISTOR BASED ON INTERLAYER HEAT TRANSFER

    公开(公告)号:US20190035999A1

    公开(公告)日:2019-01-31

    申请号:US16046815

    申请日:2018-07-26

    Inventor: FARAZ NAJAFI

    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.

    Fault-Tolerant Post-Selection for Logical Qubit Preparation

    公开(公告)号:US20250165838A1

    公开(公告)日:2025-05-22

    申请号:US18496318

    申请日:2023-10-27

    Abstract: Systems and methods for performing fault-tolerant post-selection (FTPS) on an encoded logical qubit. An FTPS controller receives syndrome graph data related to an encoded logical qubit. The encoded logical qubit includes a plurality of physical qubits encoded with a quantum error correcting code. The FTPS controller determines a respective magnitude for one or more logical gaps from the syndrome graph data, and determines an error metric based on the magnitudes of the logical gaps. The error metric is compared to a quality threshold, and depending on whether the quality threshold is met, the FTPS controller provides instructions to a quantum computing system to either keep or discard the logical qubit.

    PHASE SHIFTER EMPLOYING TRANSPARENT ELECTRODES

    公开(公告)号:US20250147378A1

    公开(公告)日:2025-05-08

    申请号:US19013903

    申请日:2025-01-08

    Inventor: Nikhil Kumar

    Abstract: Electro-optical devices and methods for constructing electro-optical devices such as a switch or phase shifter. An electrode layer is deposited on a substrate layer, a waveguide structure is deposited on the electrode layer, a first cladding layer is deposited on the waveguide structure, and the first cladding layer is planarized and bonded to a wafer. The substrate layer is removed and the electrode layer is etched to split the electrode layer into a first electrode separated from a second electrode. A second cladding layer is deposited on the etched electrode layer. The first and second electrodes may be composed of a material with a large dielectric constant, or they may be composed of a material with a large electron mobility. The device may exhibit a sandwich waveguide architecture where an electro-optic layer is disposed between two strip waveguides.

    Quantum computer using switchable network fusions

    公开(公告)号:US12271714B2

    公开(公告)日:2025-04-08

    申请号:US18108552

    申请日:2023-02-10

    Inventor: Daniel Litinski

    Abstract: A fault-tolerant quantum computer using topological codes such as surface codes can have an architecture that reduces the amount of idle volume generated. The architecture can include qubit modules that generate surface code patches for different qubits and a network of interconnections between different qubit modules. The interconnections can include “port” connections that selectably enable coupling of boundaries of surface code patches generated in different qubit modules and/or “quickswap” connections that selectably enable transferring the state of a surface code patch from one qubit module to another. Port and/or quickswap connections can be made between a subset of qubit modules. For instance port connections can connect a given qubit module to other qubit modules within a fixed range. Quickswap connections can provide a log-tree network of direct connections between qubit modules.

    Superconducting field-programmable gate array

    公开(公告)号:US12267070B2

    公开(公告)日:2025-04-01

    申请号:US18416806

    申请日:2024-01-18

    Inventor: Faraz Najafi

    Abstract: The various embodiments described herein include methods, devices, and systems for operating superconducting circuitry. In one aspect, a programmable circuit includes a configurable superconducting component and control circuitry coupled to the configurable superconducting component. The superconducting component includes an input terminal, an output terminal, and a plurality of gate terminals. The control circuitry is coupled to the superconducting component via the plurality of gate terminals. The control circuitry is adapted to selectively transition portions of the superconducting component from a superconducting state to a non-superconducting state. The control circuitry is configured to operate the superconducting component in a first configuration in which the programmable circuit is configured to perform a first function. The control circuitry is further configured to operate the superconducting component in a second configuration in which the programmable circuit is configured to perform a second function, distinct from the first function.

    Single photon interconnect employing low index cladding spot size converter

    公开(公告)号:US12259579B1

    公开(公告)日:2025-03-25

    申请号:US17806338

    申请日:2022-06-10

    Abstract: A device includes a spot size converter on a substrate. The substrate includes an optical fiber alignment structure formed thereon. The spot size converter is aligned with the optical fiber alignment structure. The spot size converter includes an oxide layer that has a first refractive index and includes a tapered section such that a first end of the spot size converter is smaller than a second end of the spot size converter. The spot size converter also includes a waveguide core in the oxide layer. The waveguide core is tapered and is smaller at the first end than at the second end of the spot size converter. The spot size converter further includes a cladding layer surrounding the oxide layer, the cladding layer having a second refractive index lower than the first refractive index of the oxide layer.

    Photonic multiplexer for single-photon sources

    公开(公告)号:US12253720B2

    公开(公告)日:2025-03-18

    申请号:US18241784

    申请日:2023-09-01

    Abstract: A device (e.g., a photonic multiplexer) is provided that includes a plurality of first switches. Each first switch in the plurality of first switches includes a plurality of first channels. Each first switch is configured to shift photons in the plurality of first channels by zero or more channels, based on first configuration information provided to the first switch. The device further includes a plurality of second switches. Each second switch includes a plurality of second channels. Each second channel is coupled with a respective first channel from a distinct first switch of the plurality of first switches. Each second switch is configured to shift photons in the plurality of second channels by zero or more channels, based on second configuration information provided to the second switch.

    Methods and systems for manufacturing semiconductor devices

    公开(公告)号:US12253483B1

    公开(公告)日:2025-03-18

    申请号:US18110848

    申请日:2023-02-16

    Abstract: The various embodiments described herein include methods for manufacturing superconductor devices. A method for manufacturing superconductors may include: (i) generating spectra data from a first superconductor device; (iii) identifying a first peak ratio between a first phase peak and a second phase peak in the spectra data; (iv) generating additional spectra data from a second superconductor device; (v) identifying a second peak ratio of the additional spectra data from the second superconductor device; (vi) adjusting a manufacturing parameter based on the first peak ratio and the second peak ratio; and (vii) manufacturing a third superconductor device based on the adjusted manufacturing parameter.

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