Work Done on a Coherently Driven Quantum System

• 作者: Issofa Nsangou Lukong Cornelius Fai
• 来源期刊: 量子信息科学期刊(英文)
• 学科: 数学
• 关键词: Power OPERATOR STATISTICAL WORK Landau-Zener Model Level CROSSING
• 年，卷（期）: 2015,（3）
• 页码范围: 89-102
• 页数: 14页
• 分类号: O1

摘要

We calculate the work done by a Landau-Zener-like dynamical field on two- and three-level quantum system by constructing a quantum power operator. We elaborate a general theory applicable to a wide range of closed-quantum system. We consider the dynamics of the system in the time domain ]-tLZ,tLZ[ (where is the LZ transition time in the sudden limit) where the external pulse changes its sign and its action becomes relevant. The statistical work is evaluated in a period [0,T] where T ≤tLZ. Our results are observed to be in good qualitative agreement with known results.