Observable Berry Phase for Charge Qubit in a Dissipative Environment
作者: Z. S. WangYuan-hua LiHualan XuLi-yun HuYi-you NieL. P. GuoMin HuangHui Pan
作者单位: 1College of Physics and Communication Electronics, Jiangxi Normal University
2Key Laboratory of Optoelectronic and Telecommunication of Jiangxi
3Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University
4Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences
5Department of Physics, National University of Singapore
6Institute of High Performance Computing
刊名: International Journal of Theoretical Physics, 2012, Vol.51 (9), pp.2850-2856
来源数据库: Springer Journal
DOI: 10.1007/s10773-012-1159-x
关键词: Geometric phaseCharge qubitDissipative systemSuperconducting circuits
英文摘要: Abstract(#br)A geometric phase of open system is directly obtained from Schrödinger equation with a hermitian Hamiltonian of a two-level atomic system interacting with its reservoirs. We find that the dynamical phases are proportional to the geometric phases in terms of Weisskopf-Wigner theory in the rotational frame. Thus an effective scheme to measure the Berry phase in a charge qubit dissipative system is proposed by coherently controlling the macroscopic quantum states formed in superconducting circuits. Our approach does not need any operations to cancel the dynamical phases so as to reduce the experimental errors. Furthermore, we find that the dissipative effects can be overcome by choosing adapted parameters of the superconducting circuit.
全文获取路径: Springer  (合作)
影响因子:1.086 (2012)

  • Berry 柏利