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Title: Observable Berry Phase for Charge Qubit in a Dissipative Environment
Authors: Wang, Z.S.
Li, Y.-h.
Xu, H.
Hu, L.-y.
Nie, Y.-y.
Guo, L.P.
Huang, M.
Pan, H. 
Keywords: Charge qubit
Dissipative system
Geometric phase
Superconducting circuits
Issue Date: Sep-2012
Citation: Wang, Z.S., Li, Y.-h., Xu, H., Hu, L.-y., Nie, Y.-y., Guo, L.P., Huang, M., Pan, H. (2012-09). Observable Berry Phase for Charge Qubit in a Dissipative Environment. International Journal of Theoretical Physics 51 (9) : 2850-2856. ScholarBank@NUS Repository.
Abstract: 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. © 2012 Springer Science+Business Media, LLC.
Source Title: International Journal of Theoretical Physics
ISSN: 00207748
DOI: 10.1007/s10773-012-1159-x
Appears in Collections:Staff Publications

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