Super-Poissonian intensity fluctuations and correlations between pumpand probe fields in Electromagnetically Induced Transparency

• Published in: Europhysics letters Vol. 61; no. 4; pp. 485 - 491
• Main Authors: Garrido Alzar, C. L., Cruz, L. S., Aguirre Gómez, J. G., França Santos, M., Nussenzveig, P.
• Format: Journal Article
• Language: English
• Published: EDP Sciences 01.02.2003
• Subjects: 42.50.-p; 42.50.Ar; 42.50.Gy
• ISSN: 0295-5075; 1286-4854
• DOI: 10.1209/epl/i2003-00155-0

We have measured the intensity fluctuations of pump and probe beams after interaction with $\chem{Rb}$ atoms in a situation of Electromagnetically Induced Transparency. Both fields present super-Poissonian statistics and their intensities become correlated, in good qualitative agreement with theoretical predictions in which both fields are treated quantum-mechanically. The intensity correlations measured are a first step towards the observation of entanglement between the fields.