Driving the common-mode of a josephson parametric converter using a short-circuited coplanar stripline
AssigneeInternational Business Machines Corporation
InventorBaleegh Abdo
Life of this patent
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Abstract
Techniques relate to an on-chip Josephson parametric converter. A Josephson ring modulator includes four nodes. A lossless on-chip flux line is capacitively coupled to two adjacent nodes of the four nodes of the Josephson ring modulator. The lossless on-chip flux line has an input port configured to receive a pump drive signal that couples differentially to the two adjacent nodes of the of the Josephson ring modulator. The pump drive signal thereby excites a common mode of the on-chip Josephson parametric converter.
Claims20
An on-chip Josephson parametric converter, comprising:
- a Josephson ring modulator including four nodes;
- and
- a lossless on-chip flux line capacitively coupled to two adjacent nodes of the four nodes of the Josephson ring modulator, the lossless on-chip flux line having an input port configured to receive a pump drive signal that couples differentially to the two adjacent nodes of the of the Josephson ring modulator, the pump drive signal thereby exciting a common mode of the on-chip Josephson parametric converter.
A method of forming an on-chip Josephson parametric converter, the method comprising:
- forming a Josephson ring modulator including four nodes;
- and
- forming a lossless on-chip flux line capacitively coupled to two adjacent nodes of the four nodes of the Josephson ring modulator, the lossless on-chip flux line having an input port configured to receive a pump drive signal that couples differentially to the two adjacent nodes of the of the Josephson ring modulator, the pump drive signal thereby exciting a common mode of the on-chip Josephson parametric converter.
A method of injecting a pump drive to an on-chip Josephson parametric converter, the method comprising:
- providing a lossless on-chip flux line in a proximity to a Josephson ring modulator of the on-chip Josephson parametric converter such that the lossless on-chip flux line couples capacitively to two adjacent nodes of the Josephson ring modulator;
- and
- transmitting a microwave signal as the pump drive to the on-chip Josephson parametric converter using the lossless on-chip flux line.
Dependencies are inferred from the claim text.