We study a physical system for creation of quantum correlations by quantum feedback control. The system is composed of two three-level atoms, each of which interacts with one of two coupled cavities. By appropriately choosing the feedback strength, we show that an arbitrary initial state can be deterministically driven to a steady-state that has a nonzero quantum discord or entanglement. It is also found that the effect of atomic spontaneous emission on quantum correlations is suppressed efficiently by increasing the frequency detuning.
© 2012 Optical Society of America
Original Manuscript: September 7, 2011
Revised Manuscript: October 9, 2011
Manuscript Accepted: October 26, 2011
Published: February 8, 2012
Jie Song, Yan Xia, and Xiu-Dong Sun, "Noise-induced quantum correlations via quantum feedback control," J. Opt. Soc. Am. B 29, 268-273 (2012)