Psiquantum Corp.

Government of the United States of America, As Represented by the Secretary of Commerce

Faraz Najafi

Qiaodan Jin Stone

Syrus Ziai

Mark G Thompson

Eric Dudley

Vitor Riseti Manfrinato

Vimal Kumar Kamineni

Chia-Jung Chung

George Kovall

Andrea Bahgat Shehata

Damien Bonneau

Joaquin Matres Abril

Mark Thompson

Yong Liang

Ann Melnichuk

Matteo Staffaroni

Gabriel J Mendoza

Adam N McCaughan

David Schiff

Adam Nykoruk McDaughan

Stephanie Meng-Yan Teo

A modular distributed cryogenic distribution system, comprising: a common chamber housing cryogenic fluid conduits; and a plurality of cryochambers connected to the common chamber. A method of operating a modular distributed cryogenic distribution system comprising a common chamber housing cryogenic fluid conduits, and plural cryochambers connected to the common chamber, includes raising one the plurality of cryochambers room temperature while a second one of the plurality of cryochambers operates at a cryogenic temperature.

Modular distributed cryogenic system

A device includes a substrate, a dielectric layer on the substrate, a waveguide within the dielectric layer, and a photodetector optically coupled to the waveguide. The photodetector is disposed above the waveguide layer and is monolithically integrated with the substrate. The photodetector is configured to operate at low temperatures, such as below about 50 K or about 20 K. In some embodiments, the monolithic photonic device includes thermal isolation structures and optical isolation structures. Techniques for manufacturing the monolithic photonic device, including the thermal isolation structures and optical isolation structures, are also described.

Photonic integrated circuit

An example photon counting device includes one or more unit cells. Each unit cell includes one or more superconducting components. Each unit cell also includes a current dynamics control element coupled in series with the one or more superconducting components. Each unit cell further includes a transistor having a superconducting gate element that is coupled with the one or more superconducting components and a channel element that is electrically insulated from the superconducting gate element, where the channel element has a first resistance while the superconducting gate element is in a superconducting state and a second resistance while the superconducting gate element is in a non-superconducting state. The photon counting device further includes a bias current source coupled to the one or more unit cells and a waveguide optically coupled to the one or more unit cells.

Scalable photon number resolving photon detector

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.

Superconducting field-programmable gate array

A superconductor device includes a barrier layer over a substrate including silicon, the barrier layer including silicon and nitrogen, and a seed layer for a superconductor layer over the barrier layer, the seed layer including aluminum and nitrogen, and 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. 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.

Superconducting nanowire single photon detector and method of fabrication thereof

An example memory cell includes a superconducting loop configured to receive a write current and form a persistent current that stores a data bit in the superconducting loop. The example memory cell further includes a superconducting wire coupled to the superconducting loop and configured to selectively read-out the data bit in the superconducting loop in response to a control signal. An example method of reading data from the memory cell includes receiving, at the superconducting loop, a write current to store a data bit in a superconducting loop, and forming a persistent current that circulates in the superconducting loop as a stored data bit. The example method further includes, in accordance with a control signal, transferring, via a superconducting wire of the memory cell that is coupled to the superconducting loop, at least a portion of the persistent current to an output of the memory cell.

Superconductive memory cells and devices

An example circuit includes a superconducting component having a plurality of narrow portions and a plurality of wide portions. The example circuit further includes a plurality of photon detector components, each photon detector component coupled to a corresponding narrow portion of the plurality of narrow portions and configured to provide an output that causes the corresponding narrow portion to transition from a superconducting state to a non-superconducting state. The example circuit also includes an output component coupled to the superconducting component, the output component configured to determine a number of the plurality of narrow portions of the superconducting component that are in the non-superconducting state.

Superconducting logic components

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.

Methods and systems for manufacturing semiconductor devices

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.

Photon number resolving detector with thermal diode

An example electric circuit includes a superconductor component having a first terminal at a first end and a second terminal at a second end. The superconductor component includes a first portion coupled to the first terminal, a second portion coupled to the second terminal, and a third portion coupling the first portion and the second portion. The third portion has a curved shape such that the first portion of the superconductor component is proximate to, and thermally coupled to, the second portion of the superconductor component. The example electric circuit further includes a coupling component coupled to the third portion of the superconductor component, and a gate component configured to generate a resistive heat that exceeds a superconducting threshold temperature of the superconductor component, where the gate component is separated from the superconductor component by the coupling component.

Superconducting switch

A device includes a superconductor layer and a piezoelectric layer positioned adjacent to the superconductor layer. The piezoelectric layer is configured to apply a first strain to the superconductor layer in response to receiving a first voltage that is below a predefined voltage threshold and to apply a second strain to the superconductor layer in response to receiving a second voltage that is above the predefined voltage threshold. While the device is maintained below a superconducting threshold temperature for the superconductor layer and is supplied with current below a superconducting threshold current for the superconductor layer, the superconductor layer is configured to 1) operate in a superconducting state when the piezoelectric layer applies the first strain to the superconductor layer and 2) operate in an insulating state when the piezoelectric layer applies the second strain to the superconductor layer.

Superconductor-to-insulator devices

The various embodiments described herein include methods, devices, and circuits for reducing switch transition time of superconductor switches. In some embodiments, an electrical circuit includes: (i) an input component configured to generate heat in response to an electrical input; and (ii) a first superconducting component thermally-coupled to the input component. The electrical circuit is configured such that, in the absence of the electrical input, at least a portion of the first superconducting component is maintained in a non-superconducting state in the absence of the electrical input; and, in response to the electrical input, the first superconducting component transitions to a superconducting state.

A superconducting circuit includes a photon detector component, a second component, and a multi-taper superconducting connector shaped to reduce current crowding, the superconducting connector electrically connecting the photon detector component and the second component. The multi-taper superconducting connector includes a first taper arranged adjacent the photon detector component and a second taper arranged adjacent the second component.

Tapered connectors for superconductor circuits

An optical device includes a substrate, a dielectric layer on the substrate, a waveguide within the dielectric layer, a light sensitive component (e.g., a photodetector) in the dielectric layer and coupled to the waveguide, and a plurality of light isolation structures in at least one of the substrate or the dielectric layer and configured to prevent stray light from reaching the light sensitive component. In some embodiments, a light isolation structure in the plurality of light isolation structures includes two opposing sidewalls and a filling material between the two opposing sidewalls. The two opposing sidewalls include an optical isolation layer. The filling material is characterized by a coefficient of thermal expansion (CTE) matching a CTE of at least one of the substrate or the dielectric layer.

Isolation of waveguide-integrated detectors using a back end of line process

A programmable circuit includes a superconducting multi-dimensional array. The programmable circuit further includes a plurality of photon detectors coupled to respective portions of the superconducting multi-dimensional array, each photon detector configured to selectively provide input to a corresponding respective portion sufficient to transition the corresponding respective portion from a superconducting state to a non-superconducting state. The programmable circuit also includes one or more electrical terminals coupled to respective second portions of the superconducting multi-dimensional array.

Growing community of inventors

Palo Alto, CA, United States of America

Faraz Najafi