US 2025/0158265 A1 · Balanced Squid Tunable Coupler

Abstract

A tunable coupler system includes an input line configured to receive an input current and a signal line configured to provide a signal line current. The tunable coupler system further includes a first superconducting quantum interference device (SQUID) inductively coupled to the input line and the signal line, and a second SQUID inductively coupled to the input line and the signal line. In addition, the tunable coupler system includes a control line inductively coupled to the first SQUID and the second SQUID. The first SQUID and the second SQUID are configured to couple the input current in the input line to the signal line to form the signal line current. A coupling strength between the input line and the signal line is determined based on a control current in the control line.

Claims20

Dependent claims

A tunable coupler system comprising:

an input line configured to receive an input current;
a signal line configured to provide a signal line current;
a first superconducting quantum interference device (SQUID) inductively coupled to the input line and the signal line;
a second SQUID inductively coupled to the input line and the signal line;
and
a control line inductively coupled to the first SQUID and the second SQUID,
wherein the first SQUID and the second SQUID are configured to couple the input current in the input line to the signal line to form the signal line current, wherein a coupling strength between the input line and the signal line is determined based on a control current in the control line.

4 more elements

An integrated circuit (IC) comprising:

an input line included in a first layer of the IC;
a signal line included in a second layer of the IC;
a first superconducting quantum interference device (SQUID) and a second SQUID included in a third layer of the IC such that the first SQUID and the second SQUID are inductively coupled to the input line and the signal line;
and
a control line included in a fourth layer of the IC such that the control line is inductively coupled to the first SQUID and the second SQUID;
wherein the first SQUID and the second SQUID are configured to couple an input current in the input line to the signal line, wherein a coupling strength between the input line and the signal line is determined based on a control current in the control line.

3 more elements

Dependencies are inferred from the claim text.

Balanced Squid Tunable Coupler

Life of this patent

Balanced Squid Tunable Coupler

Life of this patent

Abstract

Claims20