Patent ID: 9685935
Date: 2017-06-20
CPC Classifications: B82Y,G06N,H01L,H03K

Claim:
1. A tunable transmon qubit comprising: a first Josephson junction on a first path between a transmission line and a circuit ground; second and third Josephson junctions arranged in parallel with one another on a second path between the transmission line and the circuit ground to form a direct current superconducting quantum interference device (DC SQUID), the DC SQUID being in parallel with the first Josephson junction; a capacitor in parallel with the first Josephson junction and the DC SQUID on a third path between the transmission line and the circuit ground as to form, in combination with the first path, an outer loop of the tunable transmon qubit; and a bias circuit configured during an operation of the tunable transmon qubit to provide a first constant bias flux to one of the DC SQUID and the outer loop of the tunable transmon qubit and to provide a second constant bias flux to another of the DC SQUID and the outer loop of the tunable transmon qubit.