US 12,293,253 B2
Multipole filter on a quantum device with multiplexing and signal separation
Srikanth Srinivasan, Mount Kisco, NY (US); John Blair, Katonah, NY (US); George Andrew Keefe, Cortlandt Manor, NY (US); Thomas George McConkey, White Plains, NY (US); Dongbing Shao, Briarcliff Manor, NY (US); and Firat Solgun, Ossining, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Aug. 19, 2020, as Appl. No. 16/997,311.
Prior Publication US 2022/0058508 A1, Feb. 24, 2022
Int. Cl. G06N 10/00 (2022.01); H01P 1/203 (2006.01)
CPC G06N 10/00 (2019.01) [H01P 1/203 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device, comprising:
an interposer substrate comprising a readout resonator coupled to a drive line formed on the interposer substrate via a first capacitor; and
a qubit chip substrate comprising:
a qubit coupled to the readout resonator; and
a multipole filter comprising:
a bandpass filter coupled to a readout line formed on the interposer substrate, and coupled to the readout resonator via a second capacitor; and
a bandstop filter coupled to the bandpass filter, and coupled to ground via a third capacitor.