Some studies of the interaction between two two-level atoms and SU (1, 1) quantum systems

• 来源期刊: 中国物理B（英文版）
• 关键词: an isolated atom with a cavity SU (1 1) quantum discord concurrence
• 年，卷（期）: 2018,（10）
• 页码范围: 前插1,1-7
• 页数: 2页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/10/100201

摘要

Herein, we present an approach to look for the best phenomenon to measure quantum correlation. The system of two isolated qubits each interacting with a single-mode cavity was theoretically created to study the quantum correlation. Some of the phenomena, such as the quantum discord and concurrence, were generated through such a system. The influences of initial state purity, qubit motion, and detuning parameters were discussed for the phenomena. These parameters for a specific value show that the behavior of phenomena are analogous. It is interesting to mention that some values of detuning undergo a sudden death of phenomena, and the quantum discord still captures the qubits quantum correlation. We predict that the quantum discord may be a better measure of quantum correlation than concurrence.