18486080. JOSEPHSON JUNCTION-BASED CHARGE SENSING IN QUANTUM SYSTEMS (THE BOEING COMPANY)
JOSEPHSON JUNCTION-BASED CHARGE SENSING IN QUANTUM SYSTEMS
Organization Name
Inventor(s)
Rudolph J. Magyar of Fulton MD US
Ian M. Dayton of Middle River MD US
Colin W. Shea of West Friendship MD US
JOSEPHSON JUNCTION-BASED CHARGE SENSING IN QUANTUM SYSTEMS
This abstract first appeared for US patent application 18486080 titled 'JOSEPHSON JUNCTION-BASED CHARGE SENSING IN QUANTUM SYSTEMS
Original Abstract Submitted
The present disclosure provides a method of charge sensing in a quantum system. The method includes supplying a bias current through a Josephson junction. The bias current is less than a first value of a critical current of the Josephson junction. The method further includes measuring an output voltage of the Josephson junction. Responsive to a change in charge of one or more charge islands coupled to the Josephson junction, the critical current is reduced to a second value less than the bias current, causing a voltage drop across the Josephson junction.