Eur. Phys. J. D (2013) 67: 206
https://doi.org/10.1140/epjd/e2013-40117-3

Regular Article

Maximally entangled state of two weak magnetic fields in single-molecule magnets via four-wave mixing

¹ School of Physics and Electronics, Henan University, Kaifeng 475004, P.R. China
² School of Physics and Information Engineering, Jianghan University, Wuhan 430056, P.R. China
³ Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, P.R. China
⁴ School of Physics, Ludong University, Yantai 264025, P.R. China
⁵ College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, P.R. China

^a e-mail: jasonzzm@tom.com

Received: 2 March 2013
Received in final form: 30 April 2013
Published online: 18 October 2013

Abstract

We investigate the generation and propagation of a maximally entangled state of two weak-pulsed magnetic fields in a system of single-molecule magnets (SMMs) via four-wave mixing (FWM). Our numerical simulations show that the entangled state can be generated and propagates with a slow velocity or a superluminal velocity by choosing the appropriate combination of parameters under certain conditions. Moreover, the propagation velocity of the maximally entangled state can be controlled by varying the amplitude and frequency detuning of the pump fields in such a solid-state system. Our investigation provides a simple method for the generation of maximally entangled state which propagates with a slow group velocity.