中国物理B ›› 2011, Vol. 20 ›› Issue (5): 50316-050316.doi: 10.1088/1674-1056/20/5/050316
王轶文1, 于扬1, 丛山桦2, 孙国柱2, 陈健2, 吴培亨2
Cong Shan-Hua (丛山桦)a, Wang Yi-Wen (王轶文)b, Sun Guo-Zhu (孙国柱)a, Chen Jian (陈健)a, Yu Yang (于扬)b, Wu Pei-Heng (吴培亨)a
摘要: We have observed the macroscopic resonant tunneling of magnetic flux between macroscopically distinct quantum states in a superconducting flux qubit. The dependences of the macroscopic resonant tunneling on the barrier height of the potential well, the flux bias and the initial state are investigated. Detailed measurements of the tunneling rate as a function of the flux bias reveal the feature of the quantum noise in the superconducting flux qubit.
中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)