Observable Berry Phase for Charge Qubit in a Dissipative Environment
| 作者： | Z. S. Wang, Yuan-hua Li, Hualan Xu, Li-yun Hu, Yi-you Nie, L. P. Guo, Min Huang, Hui 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 phase; Charge qubit; Dissipative system; Superconducting 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. |
