We study the propagation of quantum fields through an electromagnetically induced transparency (EIT) medium with initially two squeezed and one coherent states. Conditions to preserve and to establish nonseparation criteria for perturbed quantized fluctuation fields are demonstrated. The results in this work provide a guideline for using EIT media as quantum light devices.
© 2009 Optical Society of America
Original Manuscript: February 13, 2009
Manuscript Accepted: April 7, 2009
Published: May 11, 2009
You-Lin Chuang and Ray-Kuang Lee, "Conditions to preserve quantum entanglement of quadrature fluctuation fields in electromagnetically induced transparency media," Opt. Lett. 34, 1537-1539 (2009)