Abstract

Within the frame of quantized dark-state polaritons in electromagnetically induced transparency media, noise fluctuations in the quadrature components are studied. Squeezed state transfer, quantum correlation, and noise entanglement between probe field and atomic polarization are demonstrated in single- and double-$\mathrm{\Lambda }$ configurations, respectively. Even though a larger degree of the squeezing parameter in the continuous variable helps to establish stronger quantum correlations, the inseparability criterion is satisfied only within a finite range of the squeezing parameter. The results obtained in the present study may be useful for guiding experimental realization of quantum memory devices for applications in quantum information and computation.

© 2015 Optical Society of America

Delay of squeezing and entanglement using electromagnetically induced transparency in a vapour cell

G. Hétet, B. C. Buchler, O. Glöckl, M. T. L. Hsu, A. M. Akulshin, H. -A. Bachor, and P. K. Lam
Opt. Express 16(10) 7369-7381 (2008)

Manipulation of squeezed state in electromagnetically induced transparency system via dynamic Stark effect

Yuan Li, Zhonghua Li, Dan Wang, Jiangrui Gao, and Junxiang Zhang
J. Opt. Soc. Am. B 29(11) 3177-3182 (2012)

Direct production of three-color polarization entanglement for continuous variable

Zhihui Yan and Xiaojun Jia
J. Opt. Soc. Am. B 32(10) 2139-2145 (2015)

Generation of quantum entanglement based on electromagnetically induced transparency media

You-Lin Chuang, Ray-Kuang Lee, and Ite A. Yu
Opt. Express 29(3) 3928-3942 (2021)

Quantum phase transition of a finite number of atoms in electromagnetically induced transparency media

R. A. Robles Robles and Ray-Kuang Lee
J. Opt. Soc. Am. B 37(5) 1388-1393 (2020)