US 2025/0038722 A1 · SYSTEMS AND METHODS FOR TUNABLE PARAMETRIC AMPLIFICATION

Abstract

In an implementation, a tunable traveling wave parametric amplifier (TWPA) includes a T-stage that includes a first DC-SQUID and a first interface inductively communicatively coupled to the first DC SQUID operable to apply a first bias to the first DC SQUID. The T-stage also includes a second DC-SQUID electrically communicatively coupled to the first DC-SQUID in series via a center node, and a second interface inductively communicatively coupled to the second DC-SQUID operable to apply a second bias to the second DC-SQUID. The TWPA also includes a shunting resonator communicatively coupled to the center node via a coupling capacitance. The shunting resonator includes a third DC-SQUID, and a third interface inductively communicatively coupled to the third DC SQUID operable to apply a third bias to the third DC SQUID. The first, second, and third biases are adjustable to improve a bandwidth of the tunable TWPA.

Claims24

Dependent claims

A tunable traveling wave parametric amplifier (TWPA) comprising a first T-stage, the first T-stage comprising:

a first DC-SQUID;
a first interface inductively communicatively coupled to the first DC-SQUID, the first interface operable to apply a first bias to the first DC-SQUID;
a second DC-SQUID electrically communicatively coupled to the first DC-SQUID in series via a first center node;
a second interface inductively communicatively coupled to the second DC-SQUID, the second interface operable to apply a second bias to the second DC-SQUID;
a first resonator communicatively coupled to the first center node via a first coupling capacitance, the first resonator shunted to a ground, the first resonator comprising:
a first resonator capacitance;
a first resonator inductance;
and
a third DC-SQUID;
and
a third interface inductively communicatively coupled to the third DC-SQUID, the third interface operable to apply a third bias to the third DC-SQUID, wherein the first bias and the second bias are adjustable to reduce a ripple in a gain versus frequency response of the tunable TWPA, and the third bias is adjustable to tune a position and a width of a stop-band around a pump tone frequency of the tunable TWPA.

8 more elements

A quantum processor comprising a tunable traveling wave parametric amplifier (TWPA) comprising a first T-stage, the first T-stage comprising:

a first DC-SQUID;
a first interface inductively communicatively coupled to the first DC-SQUID, the first interface operable to apply a first bias to the first DC-SQUID;
a second DC-SQUID electrically communicatively coupled to the first DC-SQUID in series via a first center node;
a second interface inductively communicatively coupled to the second DC-SQUID, the second interface operable to apply a second bias to the second DC-SQUID;
a first resonator communicatively coupled to the first center node via a first coupling capacitance, the first resonator shunted to a ground, the first resonator comprising:
a first resonator capacitance;
a first resonator inductance;
and
a third DC-SQUID;
and
a third interface inductively communicatively coupled to the third DC-SQUID, the third interface operable to apply a third bias to the third DC-SQUID, wherein the first bias and the second bias are adjustable to reduce a ripple in a gain versus frequency response of the tunable TWPA, and the third bias is adjustable to tune a position and a width of a stop-band around a pump tone frequency of the tunable TWPA.

8 more elements

Dependencies are inferred from the claim text.

Systems and methods for tunable parametric amplification

Life of this patent

Systems and methods for tunable parametric amplification

Life of this patent

Abstract

Claims24