Method and arrangement for reading out the state of a qubit
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United States of America Patent
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Feb 20, 2024
Grant Date -
Oct 28, 2021
app pub date -
Oct 10, 2019
filing date -
Oct 10, 2018
priority date (Note) -
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Abstract
For reading out a state of a qubit, a readout input waveform is injected into a system that comprises an information storage element for storing the state of the qubit and a readout resonator that is electromagnetically coupled to said information storage element. A readout output waveform is extracted from said system and detected. The injection of the readout input waveform takes place through an excitation port that is also used to inject excitation waveforms to the information storage element for affecting the state of the qubit. A phase of the readout input waveform is controllably shifted in the course of injecting it into the system.
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