Power-broadening-free correlation spectroscopy in cold atoms
Power-broadening-free correlation spectroscopy in cold atoms
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DOI：
10.1103/physreva.88.033812
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发表时间：
2013-08
影响因子：
2.9
通讯作者：
H. M. Florez;L. S. Cruz;M. Miranda;R. A. D. Oliveira;J. Tabosa;M. Martinelli;D. Felinto
中科院分区：
文献类型：
--
作者：
H. M. Florez;L. S. Cruz;M. Miranda;R. A. D. Oliveira;J. Tabosa;M. Martinelli;D. Felinto
We report a detailed investigation on the properties of correlation spectra for cold atoms under the condition of Electromagnetically Induced Transparency (EIT). We describe the transition in the system from correlation to anti-correlation as the intensity of the fields increases. Such transition occurs for laser frequencies around the EIT resonance, which is characterized by a correlation peak. The transition point between correlation and anti-correlation is independent of power broadening and provides directly the ground-state coherence time. We introduce a method to extract in real time the correlation spectra of the system. The experiments were done in two distinct magneto-optical traps (MOT), one for cesium and the other for rubidium atoms, employing different detection schemes. A simplified theory is introduced assuming three-level atoms in $\Lambda$ configuration interacting with a laser with stochastic phase fluctuations, providing a good agreement with the experimental observations.
