Tunable coupler for coupling resonant circuits
AssigneeNorthrop Grumman Systems Corporation
InventorsDAVID GEORGE FERGUSON, JEREMY BRENDON CLARK, MICAH JOHN ATMAN STOUTIMORE
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Abstract
A tunable coupler circuit includes a first transmission line, a second transmission line and a three-junction superconducting quantum interference device (SQUID) coupled between the first transmission line and the second transmission line. The three-junction SQUID includes a first Josephson Junction (JJ), a second JJ and a center JJ coupled in parallel to one another such that the first JJ and the center JJ forms a first loop and the second JJ and the center JJ forms a second loop. A resonant frequency of the tunable coupler circuit is tuned based on applying a first flux and a second flux to the first and second loops.
Claims20
A tunable coupler circuit comprising:
- a first transmission line;
- a second transmission line;
- and
- a three-junction superconducting quantum interference device (SQUID) coupled between the first transmission line and the second transmission line, the three-junction SQUID including a first Josephson Junction (JJ), a second JJ and a center JJ coupled in parallel to one another such that the first JJ and the center JJ forms a first loop and the second JJ and the center JJ forms a second loop, and
- wherein a resonant frequency of the tunable coupler circuit is tuned based on applying a first flux and a second flux to the first and second loops.
A system comprising:
- a first resonant circuit having a first resonant frequency;
- a second resonant circuit having a second resonant frequency;
- and
- a tunable coupler circuit coupled between the first resonant circuit and the second resonant circuit, the tunable coupler circuit including:
- a first transmission line;
- a second transmission line;
- and
- a three-junction superconducting quantum interference device (SQUID) coupled between the first transmission line and the second transmission line, the three-junction SQUID including a first Josephson Junction (JJ), a second JJ and a center JJ coupled in parallel to one another such that the first JJ and the center JJ forms a first loop and the second JJ and the center JJ forms a second loop;
- wherein a coupling rate between the first resonant circuit and the second resonant circuit is determined based on tuning a resonant frequency of the tunable coupler circuit.
Dependencies are inferred from the claim text.