Power-Broadening-Free Correlation Spectroscopy in Cold Atoms

Abstract

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.

8 pages, 10 figures, submitted to Physical Review A

References in corpus (5)

• From EIT photon correlations to Raman anti-correlations in coherently prepared Rb vapor
• Laser-noise-induced correlations and anti-correlations in Electromagnetically Induced Transparency
• Dynamics of saturated Bragg diffraction in a stored light grating in cold atoms
• Intensity correlations in resonance nonlinear magneto-optical rotation
• Atomic noise spectra in nonlinear magneto-optical rotation in a rubidium vapor

Cited by in corpus (5)

• Intensity correlations in the forward four-wave mixing driven by a single pump
• Perturbative approach in the frequency domain for the intensity correlation spectrum at electromagnetically induced transparency
• Defying Conventional Wisdom in Spectroscopy: Power Narrowing on IBM Quantum
• Probing light forces on cold atoms by noise correlation spectroscopy
• Correlation spectroscopy in cold atoms: light sidebands resonances in electromagnetically induced transparency condition