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US 12,073,288 B2Granted
Compact resonator with shifted higher modes for quantum buses
AssigneeInternational Business Machines Corporation
InventorsMartin O. Sandberg, Vivekananda P. Adiga, Hanhee Paik
Life of this patent
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Abstract
A resonator is based on a coplanar waveguide (CPW) structure that includes a first end portion having a first width and configured to be coupled to a first qubit. There is a middle portion having a second width that is narrower than the first width. There is a second end portion having a third width that is wider than the second width and configured to be coupled to a second qubit.
Claims22
A resonator, comprising:
- a coplanar waveguide (CPW) structure comprising;
- a first end portion having a first width and configured to be coupled to a first qubit;
- a middle portion having a second width that is narrower than the first width;
- and
- a second end portion having a third width that is wider than the second width and configured to be coupled to a second qubit,
- wherein an inductance of the middle portion is higher than an inductance of each of the first and second end portions.
3 more elements
A resonator, comprising:
- a coplanar waveguide (CPW) structure comprising;
- a first end portion having a first width and configured to be coupled to a first qubit;
- a middle portion having a second width that is narrower than the first width;
- and
- a second end portion having a third width that is wider than the second width and configured to be coupled to a second qubit
- wherein the first and third widths are based on a width that provides a capacitance and inductance of the first and second end portions, respectively, that increases a frequency of modes that are above a fundamental frequency of the CPW structure.
3 more elements
A quantum bus system, comprising:
- a first qubit;
- a second qubit;
- and
- a coplanar waveguide (CPW) structure comprising:
- a first end portion having a first width and coupled to the first qubit;
- a middle portion having a second width that is narrower than the first width;
- and
- a second end portion having a third width that is wider than the second width and coupled to the second qubit,
- wherein an inductance of the middle portion is higher than an inductance of each of the first and second end portions.
6 more elements
A quantum bus system, comprising:
- a first qubit;
- a second qubit;
- and
- a coplanar waveguide (CPW) structure comprising:
- a first end portion having a first width and coupled to the first qubit;
- a middle portion having a second width that is narrower than the first width;
- and
- a second end portion having a third width that is wider than the second width and coupled to the second qubit,
- wherein the first and third widths are based on a width that provides a capacitance and inductance of the first and second end portions, respectively, that increases a frequency of modes that are above a fundamental frequency of the CPW structure.
6 more elements
A method of coupling qubits, comprising:
- coupling a first end portion of a coplanar waveguide (CPW) structure to a first qubit;
- coupling a second end portion of the CPW structure to a second qubit;
- and
- providing a middle portion of the CPW structure to have a width that is less than a width of the first end portion and a width of the second end portion, and
- increasing a frequency of modes that are above a fundamental frequency of the CPW structure by adjusting a geometry of the first and second end portions of the CPW structure.
2 more elements
Dependencies are inferred from the claim text.