Identification of Markovian open system dynamics for qubit systems

• 来源期刊: 科学通报(英文版)
• 学科: 物理学
• 年，卷（期）: 2012,（18）
• 页码范围: 2242-2246
• 页数: 5页
• 分类号: O413.1
• 语种: 中文

摘要

We discuss the problem of identification of the dynamical generators for open two-level quantum systems in a Markovian environment.Based on Bloch sphere representation,the identification problem is converted to the estimation of a 3-dimensional real process matrix A and an inhomogeneous term c.The parameter identifiability and sufficient conditions for completely identification of A and c are obtained.Further discussion shows that the obtained sufficient conditions are not always necessary.The approach can be generalized to finite-level open quantum systems in an arbitary Markovian environment.