1202.0345 (Xin-Yu Chen et al.)

Engineering W-type steady states for three atoms via dissipation in an
optical cavity    [PDF]

Xin-Yu Chen, Li-Tuo Shen, Zhen-Biao Yang, Huai-Zhi Wu, Mei-Feng Chen

We propose a scheme for the dissipative preparation of W-type entangled
steady-states of three atoms trapped in an optical cavity. The scheme is based
on the competition between the decay processes into and out of the target
state. By suitable choice of system parameters, we resolve the whole evolution
process and employ the effective operator formalism to engineer four
independent decay processes, so that the target state becomes the stationary
state of the quantum system. The scheme requires neither the preparation of
definite initial states nor the precise control of system parameters and
preparation time.

View original: http://arxiv.org/abs/1202.0345