Systems, devices, and methods for controllably coupling qubits

Details Systems, devices, and methods for controllably coupling qubits Systems, devices, and methods for controllably coupling qubits

2011-03-01

2011-03-01

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Superconductor

Tunneling device

C326S003000, C326S004000, C326S006000

Reexamination Certificate

active

07898282

ABSTRACT:
A system for communicably coupling between two superconducting qubits may include an rf-SQUID coupler having a loop of superconducting material interrupted by a compound Josephson junction and a first magnetic flux inductor configured to controllably couple to the compound Josephson junction. The loop of superconducting material may be positioned with respect to a first qubit and a second qubit to provide respective mutual inductance coupling therebetween. The coupling system may be configured to provide ferromagnetic coupling, anti-ferromagnetic coupling, and/or zero coupling between the first and second qubits. The rf-SQUID coupler may be configured such that there is about zero persistent current circulating in the loop of superconducting material during operation.

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