Quantum Information Processing, Vol. 6, No. 4, August 2007 (© 2007)
Scheme for Generation of W and W-like States of
Nonidentical Particles and their Application in
and Li Deng
Received March 7, 2007; accepted April 8, 2007; Published online: June 20, 2007
In this paper, a scheme is proposed for the preparation of the tripartite W state
or W -like state of nonidentical particles. In our scheme, our required resources
include two atoms and one cavity ﬁeld, which makes our system become simple.
Because each party included by W state has its own two possible states, and is not
identical each other, one can easily distinguish them. Furthermore, we teleportate
an unknown state of cavity ﬁeld by using this W state as quantum channels. Our
scheme of preparation employing a single high-Q superconducting cavity turns out
to be attractive to realize based on present or future cavity QED techniques.
KEY WORDS: W state; cavity QED; teleportation.
PACS: 03.65.Bz; 42.50.Dv.
In recent years, much attention has been paid to the study of entangle-
In particular, the quantum non-locality of entanglement can
help people to demonstrate fundamental quantum properties, which are
far beyond the conceptual framework deﬁned by classical physics. In addi-
tion, entangled states, as being important resources, have been extensively
applied in some processes of quantum information processing, such as
quantum secrete communication,
Partially supported by Natural Science Foundation of Jiangxi, China, under Grant No.
0612006 and by the Scientiﬁc Research Foundation of Jiangxi Provincial Department of
Education, China, under Grant No. 191.
Department of Applied Physics, East China Jiaotong University, Nanchang 330013,
P. R. China.
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