Northrop Grumman Systems Corporation

Northwestern University

Moe Shwan Khalil

David George Ferguson

Anthony Joseph Przybysz

Jens Koch

Cheong Yiu Li

One example includes a tunable current-mirror qubit. The qubit includes a plurality of flux tunable elements disposed in a circuit loop. A first portion of the flux tunable elements can be configured to receive a first input flux and a remaining portion of the flux tunable elements can be configured to receive a second input flux to control a mode of the tunable current-mirror qubit between a microwave excitation mode to facilitate excitation or quantum state manipulation of the tunable current-mirror qubit via a microwave input signal and a noise-protected mode to facilitate storage of the quantum state of the tunable current-mirror qubit. The qubit also includes at least one capacitor interconnecting nodes between respective pairs of the flux tunable elements to facilitate formation of Cooper-pair excitons in each of the microwave excitation mode and the noise-protected mode.

Tunable current-mirror qubit system

One example includes a current device readout system. The system includes a tunable resonator having a resonant frequency that is associated with a current state of a current device. The tunable resonator can be configured to receive a tone signal having a predetermined frequency from a feedline to determine the current state of the current device. The system also includes an isolation device inductively interconnecting the tunable resonator and the current device. The isolation device can be tunable to isolate the current device in a first state and to facilitate the determination of the current state of the current device in a second state.

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Baltimore, MD, United States of America

Moe Shwan Khalil