https://doi.org/10.1140/epjd/e2012-30391-x
Regular Article
Genuine entanglement among coherent excitonic states of three quantum dots located individually in separated coupled QED cavities
1 Research Institute for Fundamental
Sciences, University of Tabriz, 51666-16471
Tabriz,
Iran
2 Faculty of Physics, Department of
Theoretical Physics and Astrophysics, University of Tabriz,
51666-16471
Tabriz,
Iran
3 Photonics Group, Research Institute
for Applied Physics and Astronomy, University of Tabriz, 51666-16471
Tabriz,
Iran
a e-mail: n.behzadi@tabrizu.ac.ir
Received:
20
June
2012
Received in final form:
27
November
2012
Published online:
24
January
2013
New scheme for generating genuine three-partite entanglement among three quantum dots (QDs) is proposed. The QDs are trapped in an one-dimensional (1D) array of three equidistance single-mode coupled cavities. Photon hopping is considered to be responsible for coupling between the cavities. The effective dynamics of the system leads to generate genuine three-partite entangled coherent excitonic states in QDs. The entanglement of these states, after encoding as three-qubit system, can be detected by entanglement witnesses (EWs) based on GHZ-states. It is shown that the generated entangled states can be arbitrarily very close to the GHZ-states.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013
