Artículos de revistas
Corrections to the Berry phase in a solid-state qubit due to low-frequency noise
Fecha
2014-01Registro en:
Lombardo, Fernando Cesar; Villar, Paula Ines; Corrections to the Berry phase in a solid-state qubit due to low-frequency noise; American Physical Society; Physical Review A: Atomic, Molecular And Optical Physics; 89; 1; 1-2014; 1-8; 012110
1050-2947
Autor
Lombardo, Fernando Cesar
Villar, Paula Ines
Resumen
We present a quantum open-system approach to analyze the nonunitary dynamics of a superconducting qubit when it evolves under the influence of external noise. We consider the presence of longitudinal and transverse environmental fluctuations affecting the system's dynamics and model these fluctuations by defining their correlation function in time. By using a Gaussian-like noise correlation, we can study low- and high-frequency noise contribution to decoherence and implement our results in the computation of geometric phases in open quantum systems. We numerically study when the accumulated phase of a solid-state qubit can still be found close to the unitary (Berry) one. Our results can be used to explain experimental measurements of the Berry phase under high-frequency fluctuations and design experimental future setups when manipulating superconducting qubits.