公开(公告)号：IL298357B1

公开(公告)日：2025-04-01

申请号：IL29835722

申请日：2022-11-17

Applicant: IBM ,  JIRI STEHLIK ,  DEVIN UNDERWOOD ,  DAVID ZAJAC ,  MATTHIAS STEFFEN

Inventor： JIRI STEHLIK ,  DEVIN UNDERWOOD ,  DAVID ZAJAC ,  MATTHIAS STEFFEN

IPC: B82Y10/00 ,  G06N10/00 ,  G06N10/20 ,  G06N10/40 ,  G06N10/70

Abstract: Devices and/or computer-implemented methods to facilitate a quantum gate between qubits using a tunable coupler and a capacitor device are provided. According to an embodiment, a quantum coupler device can comprise a tunable coupler coupled between terminals of a same polarity of a first qubit and a second qubit, the tunable coupler configured to control a first coupling between the first qubit and the second qubit. The quantum coupler device can further comprise a capacitor device coupled to terminals of an opposite polarity of the first qubit and the second qubit, the capacitor device configured to provide a second coupling that is opposite in sign relative to the first coupling.

公开(公告)号：GB2556251B

公开(公告)日：2020-06-03

申请号：GB201800479

申请日：2016-05-23

Applicant: IBM

Inventor： OLIVER DIAL ,  MATTHIAS STEFFEN ,  DOUGLAS TEMPLETON MCCLURE III ,  JAY GAMBETTA

IPC: H01P7/00 ,  B82Y10/00 ,  G06N10/00 ,  G06N20/00 ,  H01L39/02 ,  H01L39/14 ,  H01L39/24 ,  H01P1/205

Abstract: A technique relates a superconducting microwave cavity. An array of posts has different heights in the cavity, and the array supports a localized microwave mode. The array of posts includes lower resonant frequency posts and higher resonant frequency posts. The higher resonant frequency posts are arranged around the lower resonant frequency posts. A first plate is opposite a second plate in the cavity. One end of the lower resonant frequency posts is positioned on the second plate so as to be electrically connected to the second plate. Another end of the lower resonant frequency posts in the array is open so as not to form an electrical connection to the first plate. Qubits are connected to the lower resonant frequency posts in the array of posts, such that each of the qubits is physically connected to one or two of the lower resonant frequency posts in the array of posts.

公开(公告)号：GB2556251A

公开(公告)日：2018-05-23

申请号：GB201800479

申请日：2016-05-23

Applicant: IBM

Inventor： OLIVER DIAL ,  MATTHIAS STEFFEN ,  DOUGLAS TEMPLETON MCCLURE III ,  JAY GAMBETTA

IPC: H01L39/14 ,  G06N99/00

Abstract: A technique relates a superconducting microwave cavity. An array of posts has different heights in the cavity (100), and the array supports a localized microwave mode. The array of posts includes lower resonant frequency posts (20) and higher resonant frequency posts (10). The higher resonant frequency posts (10) are arranged around the lower resonant frequency posts (20). A first plate (25) is opposite a second plate (30) in the cavity (100). One end of the lower resonant frequency posts (20) is positioned on the second plate (30) so as to be electrically connected to the second plate (30). Another end of the lower resonant frequency posts (20) in the array is open so as not to form an electrical connection to the first plate (25). Qubits (40) are connected to the lower resonant frequency posts (20) in the array of posts, such that each of the qubits (40) is physically connected to one or two of the lower resonant frequency posts (20) in the array of posts.

公开(公告)号：IL298357A

公开(公告)日：2023-01-01

申请号：IL29835722

申请日：2022-11-17

Applicant: IBM CORP ,  JIRI STEHLIK ,  DEVIN UNDERWOOD ,  DAVID ZAJAC ,  MATTHIAS STEFFEN

Inventor： JIRI STEHLIK ,  DEVIN UNDERWOOD ,  DAVID ZAJAC ,  MATTHIAS STEFFEN

IPC: B82Y10/00 ,  G06N10/00 ,  G06N10/40 ,  H01L29/66

Abstract: Devices and/or computer-implemented methods to facilitate a quantum gate between qubits using a tunable coupler and a capacitor device are provided. According to an embodiment, a quantum coupler device can comprise a tunable coupler coupled between terminals of a same polarity of a first qubit and a second qubit, the tunable coupler configured to control a first coupling between the first qubit and the second qubit. The quantum coupler device can further comprise a capacitor device coupled to terminals of an opposite polarity of the first qubit and the second qubit, the capacitor device configured to provide a second coupling that is opposite in sign relative to the first coupling.

公开(公告)号：GB2528196B

公开(公告)日：2018-03-21

申请号：GB201516760

申请日：2014-01-21

Applicant: IBM

Inventor： JERRY CHOW ,  JAY GAMBETTA ,  SETH MERKEL ,  CHAD TYLER RIGETTI ,  MATTHIAS STEFFEN

IPC: H01L49/02 ,  G06N99/00 ,  H03K19/195

Abstract: A device includes a housing, at least two qubits disposed in the housing and a resonator disposed in the housing and coupled to the at least two qubits, wherein the at least two qubits are maintained at a fixed frequency and are statically coupled to one another via the resonator, wherein energy levels |03> and |12> are closely aligned, wherein a tuned microwave signal applied to the qubit activates a two-qubit phase interaction.