EFFECTS OF TEMPERATURE ON THE ABSORPTION LINE-SHAPE FUNCTION FOR DRIVEN 2-LEVEL ATOMS - A NON-MARKOVIAN TREATMENT

被引：10

作者：

BRINATI, JR ^{[1
]}

MIZRAHI, SS ^{[1
]}

PRATAVIERA, GA ^{[1
]}

机构：

[1] UNIV FED SAO CARLOS, DEPT FIS, BR-13565905 SAO CARLOS, SP, BRAZIL

来源：

PHYSICAL REVIEW A | 1995年 / 52卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.52.2804

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The description of a non-Markovian process is presented and the asymptotic solution of the generalized master equation is obtained for a two-level atom pumped externally by a monochromatic time-dependent electric field. We give the explicit expression for the absorption line-shape function and discuss its features as a function of the temperature and the memory parameter. We verified the following interesting results: (a) At a critical temperature the line shape undergoes a phase transition, the single-bump profile splits into two bumps; (b) for small values of the memory parameter k the linewidths broaden, becoming larger than the ones calculated under the Markovian approximation, and after reaching some maximum value they narrow monotonically with increasing values of k, this behavior being standard for any finite temperature.

引用

页码：2804 / 2810

页数：7

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