We investigate analytically and numerically the interactions of dark solitons under competing nonlocal cubic and local quintic nonlinearities. It is shown that the self-defocusing quintic nonlinearity will strengthen the attractive interaction and decrease the relative distance between solitons, whereas the self-focusing quintic nonlinearity will enhance the repulsive interaction and increase soliton separation. We demonstrate these results by approximate variational approach and direct numerical simulation.
© 2014 Optical Society of America
Original Manuscript: January 23, 2014
Revised Manuscript: February 19, 2014
Manuscript Accepted: February 20, 2014
Published: March 19, 2014
Wei Chen, Ming Shen, Qian Kong, Jielong Shi, Qi Wang, and Wieslaw Krolikowski, "Interactions of nonlocal dark solitons under competing cubic–quintic nonlinearities," Opt. Lett. 39, 1764-1767 (2014)