Active noise cancelation in superconducting Qubits using closed-loop feedback

A closed-loop feedback system and method of active noise cancellation to maintain a desired operating frequency of a qubit during a quantum computation, even when that frequency is relatively sensitive to flux noise. A series of Ramsey experiments is performed on the qubit to estimate an offset betw...

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Hauptverfasser:	Vepsalainen, Antti Pekka, Oliver, William D, Gustavsson, Simon, Winik, Roni
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS COMPUTING COUNTING ELECTRICITY PHYSICS PULSE TECHNIQUE
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creator	Vepsalainen, Antti Pekka Oliver, William D Gustavsson, Simon Winik, Roni
description	A closed-loop feedback system and method of active noise cancellation to maintain a desired operating frequency of a qubit during a quantum computation, even when that frequency is relatively sensitive to flux noise. A series of Ramsey experiments is performed on the qubit to estimate an offset between its actual and desired operating frequencies, and the error is accumulated. After the probing is complete, the accumulated error is supplied to an arbitrary waveform generator that produces a magnetic flux that is coupled to the qubit, thereby tuning the qubit and actively controlling its operating frequency. Having corrected the operating frequency of the qubit and extended its coherence time, the quantum state of the qubit is allowed to evolve according to the computation.
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subjects	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS COMPUTING COUNTING ELECTRICITY PHYSICS PULSE TECHNIQUE
title	Active noise cancelation in superconducting Qubits using closed-loop feedback
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