Rigetti & Co, LLC

Mark Field

Rodney Franklyn Sinclair

Xiqiao Wang

David Pappas

Joshua Yousouf Mutus

In a general aspect, junction properties of tunnel junctions are altered by voltage-assisted annealing processes. In some cases, a method includes obtaining a circuit comprising a tunnel junction, modifying a junction resistance of the tunnel junction by applying a voltage across the tunnel junction, and obtaining a measured value of the junction resistance. The tunnel junction may include a metal and a metal oxide.

Voltage-assisted annealing to alter tunnel junction properties

In a general aspect, signals are converted between regimes in a quantum computing system. In some cases, a quantum computing system includes: a quantum processing unit, a control system, a transmission medium, and circuitry. The quantum processing unit includes a superconducting circuit, which includes a plurality of qubit devices. The control system includes a signal generator configured to generate a first control signal and encode qubit control information in the first control signal. The transmission medium is configured to couple the signal generator with a signal conversion system. The signal conversion system is configured to: receive the first control signal generated by the signal generator; and generate a second control signal based on the qubit control information encoded in the first control signal. The circuitry is configured to deliver the second control signal to the plurality of qubit devices.

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Campbell, CA, United States of America

Mark Field