A new finite-dimensional thermal coherent state and its Wigner distribution function

• Published in: Chinese physics B Vol. 20; no. 1; pp. 371 - 376
• Main Author: 孟祥国 王继锁 梁宝龙
• Format: Journal Article
• Language: English
• Published: IOP Publishing 2011
• Subjects: Wigner函数; Wigner分布函数; 有限维; 李代数; 热相干态; 纠缠态表象; 集成技术; 非经典性质
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/20/1/014204

This paper constructs a new type of finite-dimensional thermal coherent states （FDTCS）, which differs from the proceeding thermal coherent state in construction, as realisations of SU（2） Lie algebra. Using the technique of integration within an ordered product of operator, it investigates the orthonormality and completeness relation of the FDTCS. Based on the thermal Wigner operator in the thermal entangled state representation, the Wigner function of the FDTCS is obtained. The nonclassical properties of the FDTCS are discussed in terms of the negativity of its Wigner function.