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US 12,699,154 B2Granted
Quantum magnetic field receiving device
AssigneesThe University of Adelaide, Franzesco Giazotto, Petar B. Atanackovic
InventorsFrancesco Giazotto, Petar B. Atanackovic, Giuseppe Carlo Tettamanzi, Isaac Nakone
Life of this patent
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Abstract
A quantum magnetic field receiving device includes a superconducting quantum interference device (SQUID) or a superconducting quantum interference filter (SQIF) and an electrostatic gating circuit configured to apply electrostatic fields to Josephson Junctions of the SQUID or SQIF.
Claims10
A quantum magnetic field receiving device comprising:
- a superconducting quantum interference device (SQUID) including:
- a superconducting loop including a first arm spaced apart from a second arm;
- a first Josephson Junction in the first arm;
- a second Josephson Junction in the second arm;
- a third arm electrically connecting the first arm and the second arm;
- and
- a third Josephson Junction in the third arm, wherein each of the three Josephson Junctions has a junction material;
- and
- an electrostatic gating circuit configured to apply a first electrostatic field to the first Josephson Junction and a second electrostatic field to the second Josephson Junction,
- wherein a first critical supercurrent of the junction material of the first Josephson Junction is tuneable by applying the first electrostatic field to the junction material effected by a first gate voltage provided by the electrostatic gating circuit and a second critical supercurrent of the junction material of the second Josephson Junction is tuneable by applying the second electrostatic field to the junction material effected by a second gate voltage provided by the electrostatic gating circuit, and
- wherein the first critical supercurrent is tuned to based on the second supercurrent to improve linearity of magnetic flux-to-voltage response of the quantum magnetic field receiving device,
- wherein the first and the second critical supercurrent are tuned relative to a third critical supercurrent of the junction material of the third Josephson Junction, and
- wherein the third critical supercurrent of the junction material of the third Josephson Junction is tuneable by applying a third electrostatic field to the junction material effected by a third gate voltage provided by the electrostatic gating circuit.
10 more elements
A quantum magnetic field receiving device comprising:
- a superconducting quantum interference filter (SQIF) including:
- two or more superconducting loops, each including a first arm spaced apart from a second arm, wherein a second arm of a first superconducting loop forms a first arm of a second superconducting loop;
- a first Josephson Junction in the first arm of the first superconducting loop;
- a second Josephson Junction in the second arm of the first superconducting loop which forms the first arm of the second superconducting loop;
- and
- a third Josephson Junction in the second arm of second superconducting loop,
- wherein each of the first, second and third Josephson Junctions has a junction material;
- and
- an electrostatic gating circuit configured to apply a first electrostatic field to the first Josephson Junction, a second electrostatic field to the second Josephson Junction, and a third electrostatic field to the third Josephson Junction,
- wherein a first critical supercurrent of the junction material of the first Josephson Junction is tuneable by applying the first electrostatic field to the junction material effected by a first gate voltage provided by the electrostatic gating circuit and a second critical supercurrent of the junction material of the second Josephson Junction is tuneable by applying the second electrostatic field to the junction material effected by a second gate voltage provided by the electrostatic gating circuit and a third critical supercurrent of the junction material of the third Josephson Junction is tuneable by applying the third electrostatic field to the junction material effected by a third gate voltage provided by the electrostatic gating circuit, and
- wherein the first, second and third critical supercurrents are tuned relative to each other to improve linearity of magnetic flux-to-voltage response of the quantum magnetic field receiving device.
8 more elements
Dependencies are inferred from the claim text.