Measuring the Berry phase in a superconducting phase qubit by a shortcut to adiabaticity
Zhenxing Zhang, Tenghui Wang, Liang Xiang, Jiadong Yao, Jianlan Wu, Yi Yin
DOI 10.1103/PhysRevA.95.042345 · Physical Review A
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Abstract
With a counter-diabatic field supplemented to the reference control field, the “shortcut to adiabaticiy” (STA) protocol is implemented in a superconducting phase qubit. The Berry phase measured in a short time scale is in good agreement with the theoretical result acquired from an adiabatic loop. The trajectory of a qubit vector is extracted, verifying the Berry phase alternatively by the integrated solid angle. The classical noise is introduced to the amplitude or phase of the total control field. The mean of the Berry phase measured under either noise is almost equal to that without noise, while the variance under the amplitude noise can be described by an analytical expression.
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