N-qubitW state of spatially separated single molecule magnets.
A simple scheme is proposed to generate a N-qubit W state of spatiall separated single molecule magnets (SMM) in a cavity-fiber-cavity system. In the present scheme, the framework consisting of entangled qubits can be expediently designed according to our needs. By quantitatively discussing the case of N=4, we show that the effects of SMM's spontaneous decay and photon leakage out of fiber can be suppressed in our scheme due to the presence of virtual excited processes in SMM and fiber modes. Moreover, we also show that the present scheme is robust with respect to some deviations of experimental parameters, and as a result, the present investigation provides a research clue for realizing multi-partite entanglement between distant SMMs solid-state nanostructures, which may result in a substantial impact on the progress of multi-node quantum information network.
Lü
Xin-You
XY
Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Peoples Republic of China.
Song
Pei-Jun
PJ
Liu
Ji-Bing
JB
Yang
Xiaoxue
X
D003198:Computer Simulation; D004574:Electromagnetic Fields; D008280:Magnetics; D008956:Models, Chemical