Register to reply

AC Stark shift

by Niles
Tags: shift, stark
Share this thread:
Apr16-11, 02:53 PM
P: 1,863
1. The problem statement, all variables and given/known data

In my book, they do calculations on a 2-level atom. After some approximations, they reach the following equation for the coefficient for the first (lower) level:

c_1(t)\approx c_1(0)e^{-i|\Omega|^2t/\delta}

where Omega is the Rabi frequency and delta is the detuning. They say that this equations is basically the AC Stark shift, since the amplitude evolves as if the state energy was shifted |Omega|2/delta. My questions are

1) How do we see that the state energy is shifted by |Omega|2/delta?
2) Is there a specific reason why we call it AC Stark shift?

Any help will be greatly appreciated.

Phys.Org News Partner Science news on
'Smart material' chin strap harvests energy from chewing
King Richard III died painfully on battlefield
Capturing ancient Maya sites from both a rat's and a 'bat's eye view'

Register to reply

Related Discussions
AC Stark Effect General Physics 1
Stark Effect Atomic, Solid State, Comp. Physics 9
Mr. Tony Stark Career Guidance 9
Stark effect Advanced Physics Homework 2
Stark effect Advanced Physics Homework 16