Extracting the lifetime of a synthetic two-level system

The Kerr Parametric Oscillator (KPO) is a nonlinear resonator system that is often described as a synthetic two-level system. In the presence of noise, the system switches between two states via a fluctuating trajectory in phase space, instead of following a straight path. The presence of such fluct...

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Veröffentlicht in:Applied physics letters 2022-10, Vol.121 (16)
Hauptverfasser: Margiani, Gabriel, Guerrero, Sebastián, Heugel, Toni L., Marty, Christian, Pachlatko, Raphael, Gisler, Thomas, Vukasin, Gabrielle D., Kwon, Hyun-Keun, Miller, James M. L., Bousse, Nicholas E., Kenny, Thomas W., Zilberberg, Oded, Sabonis, Deividas, Eichler, Alexander
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Sprache:eng
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Zusammenfassung:The Kerr Parametric Oscillator (KPO) is a nonlinear resonator system that is often described as a synthetic two-level system. In the presence of noise, the system switches between two states via a fluctuating trajectory in phase space, instead of following a straight path. The presence of such fluctuating trajectories makes it hard to establish a precise count or even a useful definition, of the “lifetime” of the state. Addressing this issue, we compare several rate counting methods that allow to estimate a lifetime for the levels. In particular, we establish that a peak in the Allan variance of fluctuations can also be used to determine the levels' lifetime. Our work provides a basis for characterizing KPO networks for simulated annealing where an accurate determination of the state lifetime is of fundamental importance.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0121595