US 12,271,783 B2
Control circuit comprising symmetric asymmetric threaded superconducting quantum interference devices (symmetric ATSs)
Amir H. Safavi-Naeini, Palo Alto, CA (US)
Assigned to Amazon Technologies, Inc., Seattle, WA (US)
Filed by Amazon Technologies, Inc., Seattle, WA (US)
Filed on Dec. 9, 2021, as Appl. No. 17/547,146.
Prior Publication US 2023/0186132 A1, Jun. 15, 2023
Int. Cl. G06N 10/40 (2022.01); G06N 10/20 (2022.01)
CPC G06N 10/40 (2022.01) [G06N 10/20 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
one or more resonators; and
a control circuit coupled with the one or more resonators, the control circuit comprising:
two or more symmetrically arranged asymmetrically-threaded superconducting quantum interference devices (ATSs),
wherein the control circuit is configured to:
excite phonons in the one or more resonators by driving a storage mode of the one or more resonators; and
dissipate phonons from the one or more resonators via an open transmission line coupled to the control circuit configured to absorb photons from a dump mode of the control circuit, and
wherein respective junctions of the symmetrically arranged ATSs are arranged such that for a symmetric mode:
a first set of junctions of a first one of the ATSs connect on a first side to a positive phase difference potential node and connect on a second side to a negative phase difference potential node; and
a second set of junctions of a second one of the ATSs connect on another first side to another positive phase difference potential node and connect on another second side to a same negative phase difference potential node as the junctions of the first one of the ATSs.