Theoretical simulation of the photoassociation process for NaCs

We investigate the two-step association process of NaCs using the time-dependent wave packet method.Ground state atoms can be photoassociated to the low vibrational levels of the ground state for an NaCs molecule by the two-step association.The time-dependent Schro¨dinger equation of the association...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 2; pp. 208 - 213
Main Author 张常哲 郑斌 王军 孟庆田
Format Journal Article
LanguageEnglish
Published 01.02.2013
Subjects
Approximation
Ground state
Lasers
Mathematical analysis
Population distribution
Schroedinger equation
Simulation
Wave packets
三态模型
傅立叶变换
基态原子
振动能级
时间依赖性
理论模拟
缔合
薛定谔方程
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/2/023401

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Summary:We investigate the two-step association process of NaCs using the time-dependent wave packet method.Ground state atoms can be photoassociated to the low vibrational levels of the ground state for an NaCs molecule by the two-step association.The time-dependent Schro¨dinger equation of the association process is solved within a three-state model and the wave packet is propagated with the ＂split operator-Fourier transform＂ scheme and the rotating-wave approximation（RWA）.The vibrational population distribution of the ground state can be obtained by projecting the wave packet to every vibrational level of the ground state.The results not only show that for NaCs achievement of photoassociation production is accompanied by the photodissociation of the higher vibrational molecules,but also show that the vibrational distribution in lower vibrational levels of the ground state changes with the laser parameters.
Bibliography:photoassociation,time-dependent wave packet method,NaCs
We investigate the two-step association process of NaCs using the time-dependent wave packet method.Ground state atoms can be photoassociated to the low vibrational levels of the ground state for an NaCs molecule by the two-step association.The time-dependent Schro¨dinger equation of the association process is solved within a three-state model and the wave packet is propagated with the ＂split operator-Fourier transform＂ scheme and the rotating-wave approximation（RWA）.The vibrational population distribution of the ground state can be obtained by projecting the wave packet to every vibrational level of the ground state.The results not only show that for NaCs achievement of photoassociation production is accompanied by the photodissociation of the higher vibrational molecules,but also show that the vibrational distribution in lower vibrational levels of the ground state changes with the laser parameters.
11-5639/O4
Zhang Chang-Zhe, Zheng Bin, Wang Jun, Meng Qing-Tian（ College of Physics and Electronics, Shandong Normal University, Jinan 250014, China）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/2/023401