公开(公告)号：IL286610D0

公开(公告)日：2021-10-31

申请号：IL28661021

申请日：2021-09-22

Applicant: IBM ,  SANDBERG MARTIN ,  ADIGA VIVEKANANDA ,  TOPALOGLU RASIT ONUR

Inventor： SANDBERG MARTIN ,  ADIGA VIVEKANANDA ,  TOPALOGLU RASIT ONUR

IPC: B82Y10/00 ,  G06N10/00 ,  H01L27/18 ,  H01L39/02 ,  H01L39/22 ,  H01L39/24

Abstract: A fluxonium qubit includes a superinductor. The superinductor includes a substrate, and a first vertical stack extending in a vertical direction from a surface of the substrate. The first vertical stack includes a first Josephson junction and a second Josephson junction connected in series along the vertical direction. The superinductor includes a second vertical stack extending in a vertical direction from a surface of the substrate. The second vertical stack includes a third Josephson junction. The superinductor includes a superconducting connector connecting the first and second vertical stacks in series such that the first, second, and third Josephson junctions are connected in series. The fluxonium qubit further includes a shunted Josephson junction connected to the superinductor with superconducting wires such that the first, second, and third Josephson junctions of the superinductor that are in series are connected in parallel with the shunted Josephson junction.

公开(公告)号：IL287254D0

公开(公告)日：2021-12-01

申请号：IL28725421

申请日：2021-10-13

Applicant: IBM ,  SANDBERG MARTIN ,  ROSENBLATT SAMI ,  TOPALOGLU RASIT ONUR

Inventor： SANDBERG MARTIN ,  ROSENBLATT SAMI ,  TOPALOGLU RASIT ONUR

IPC: G06N10/00 ,  H01L27/18 ,  H01L39/02 ,  H01L39/08 ,  H01L39/12 ,  H01L39/22 ,  H01L39/24 ,  H03K19/195

Abstract: A tunable qubit device includes a tunable qubit, the tunable qubit including a superconducting quantum interference device (SQUID) loop. The tunable qubit device further includes a superconducting loop inductively coupled to the SQUID loop, and a flux bias line inductively coupled to the superconducting loop. The superconducting loop includes a superconducting material having a critical temperature that is a lower temperature than a critical temperature of any superconducting material of the tunable qubit. In operation, the superconducting loop provides a persistent bias to the tunable qubit.