Laser cooling of molecules via single spontaneous emission

被引：8

作者：

Ooi, CHR ^{[1
]}

Marzlin, KP ^{[1
]}

Audretsch, J ^{[1
]}

机构：

[1] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

来源：

EUROPEAN PHYSICAL JOURNAL D | 2003年 / 22卷 / 02期

关键词：

D O I：

10.1140/epjd/e2002-00227-7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A general scheme for reducing the center-of-mass entropy is proposed. It is based on the. repetition of a cycle, composed of three concepts: velocity selection, deceleration and irreversible accumulation. Well-known laser techniques are used to represent these concepts: Raman pi-pulse for velocity selection, STIRAP for deceleration, and a single spontaneous emission for irreversible accumulation. No closed pumping cycle nor repeated spontaneous emissions are required, so the scheme is applicable to cool a molecular gas. The quantum dynamics are analytically modelled using the density matrix. It is shown that during the coherent processes the gas is translationally cooled. The internal states serve as an entropy sink, in addition to spontaneous emission. This scheme provides new possibilities to translationally laser-cool molecules for high precision molecular spectroscopy and interferometry.

引用

页码：259 / 267

页数：9

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