Capacitively-shunted asymmetric DC-SQUID for qubit readout and reset
US10235635B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Oct 19, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tunable resonator is formed by shunting a set of asymmetric DC-SQUIDs with a capacitive device. An asymmetric DC-SQUID includes a first Josephson junction and a second Josephson junction, where the critical currents of the first and second Josephson junctions are different. A coupling is formed between the tunable resonator and a qubit such that the capacitively-shunted asymmetric DC-SQUIDs can dispersively read a quantum state of the qubit. An external magnetic flux is set to a first value and applied to the tunable resonator. A first value of the external magnetic flux causes the tunable resonator to tune to a first frequency within a first frequency difference from a resonance frequency of the qubit, the tunable resonator tuning to the first frequency causes active reset of the qubit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.