Landau-Zener-Stückelberg spectroscopy of a superconducting flux qubit

Shuang Xu, Yang Yu, Guozhu Sun
2010 Physical Review B  
We proposed a new method to measure the energy spectrum of a superconducting flux qubit. Different from the conventional frequency spectroscopy, a short triangle pulse is used to drive the qubit through the anticrossing and generates Landau-Zener-St\"uckelberg interference patterns, from which the information of the energy spectrum can be extracted. Without installing microwave lines one can simplify the experimental setup and reduce the unwanted effects of noise. Moreover, the method can be
more » ... lied to other quantum systems, opening the possibility of calibrating and manipulating qubits with linear pulses.
doi:10.1103/physrevb.82.144526 fatcat:5sksfawrzre37ksr73wnksaz5a