超导磁通量子比特中的光子辅助隧穿

Photon Assistant Tunneling in the Superconductor Flux Qubit

在极低温的条件下(T=20mK),对Nb/Al0x/Nb构建的超导磁通量子比特进行微波辐照,观察到了光子辅助隧穿。光子辅助隧穿的现象和共振隧穿有着很好的对应关系,证实了超导磁通量子比特中的量子化能级。改变微波功率,进一步得到了多光子作用下的光子辅助隧穿。

We applied microwave irradiation on the superconductor flux qubit consisted of Nb/A1Ox/Nb at the temperature of 20 mK andobserved the photon assistant tunneling.The good correspondence between the photon assistant tunneling and the macroscopic resonanttunneling,which proved the quantized energy levels in the superconductor flux qubit.By varying the microwave power,we furthermoregot the results of the multiphoton assistant tunneling.