中国物理B ›› 2017, Vol. 26 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/26/12/120301
Analytical and numerical investigations of displaced thermal state evolutions in a laser process
Chuan-Xun Du(杜传勋), Xiang-Guo Meng(孟祥国), Ran Zhang(张冉), Ji-Suo Wang(王继锁)
- 1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
2. School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
Analytical and numerical investigations of displaced thermal state evolutions in a laser process
Chuan-Xun Du(杜传勋)1, Xiang-Guo Meng(孟祥国)2, Ran Zhang(张冉)1, Ji-Suo Wang(王继锁)1,2
- 1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
2. School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
摘要： We investigate how displaced thermal states (DTSs) evolve in a laser channel. Remarkably, the initial DTS, an example of a mixed state, still remains mixed and thermal. At long times, they finally decay to a highly classical thermal field only related to the laser parameters κ and g. The normal ordering product of density operator of the DTS in the laser channel leads to obtaining the analytical time-evolution expressions of the photon number, Wigner function, and von Neumann entropy. Also, some interesting results are presented via numerically investigating these explicit time-dependent expressions.
中图分类号: (Quantum mechanics)
- 03.65.-w