Coupled-line bus to suppress classical crosstalk for superconducting qubits
AssigneeInternational Business Machines Corporation
InventorsFirat Solgun, Dongbing Shao, Markus Brink
Life of this patent
Estimating the term…
Abstract
A system includes a first quantum circuit plane that includes a first qubit, a second qubit and a third qubit. A coupled-line bus is coupled between the first qubit and the second qubit. A second circuit plane is connected to the first quantum circuit plane, comprising a control line coupled to the third qubit. The control line and the coupled-line bus are on different planes and crossing over each other, and configured to mitigate cross-talk caused by the crossing during signal transmission.
Claims22
A system, comprising:
- a first quantum circuit plane comprising:
- a first qubit;
- a second qubit;
- a third qubit;
- and
- a coupled-line bus coupled between the first qubit and the second qubit;
- and
- a second circuit plane connected to the first quantum circuit plane, comprising a control line coupled to the third qubit, wherein the control line and the coupled-line bus are on different planes and cross over each other and are configured to mitigate cross-talk caused by the crossing over of the control line and the coupled-line during signal transmission.
A method of reducing crosstalk between different planes of qubits, the method comprising:
- providing a coupled-line bus between a first qubit and a second qubit of a first quantum circuit plane;
- providing a control line to a third qubit of the first quantum circuit plane, wherein the control line is on a second circuit plane that is on a different plane than the first quantum circuit plane;
- and
- coupling the first quantum circuit plane to the second circuit plane such that the control line and the coupled-line bus are on different planes and cross over each other, wherein the control line and the coupled-line bus mitigate cross talk caused by the crossing over of the control line and the coupled-line bus during signal transmission.
A quantum circuit structure, comprising:
- a coupled-line bus between a first qubit and a second qubit of a first quantum chip;
- and
- a control line to a third qubit, wherein:
- the control line that is on a second chip is on a different plane than the first quantum chip,
- the second chip is bonded to the first quantum chip via bump bonds, and
- the control line and the coupled-line bus are on different planes and cross over each other and configured to mitigate cross talk caused by the crossing over of the control line and the coupled-line bus during signal transmission.
Dependencies are inferred from the claim text.