Control of entanglement sudden death by Kerr medium |
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Authors: | Zheng Qiang Zhang Xiao-Ping and Ren Zhong-Zhou |
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Institution: | Department of Physics, Nanjing University, Nanjing 210093,
China |
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Abstract: | The entanglement dynamics of system, where atoms A and B interact
with single mode cavity fields a and b respectively, is
studied. The interaction between atom A and cavity a may be
described by using the typical Jaynes--Cummings model, while that
between the atom B and cavity b filled with a Kerr medium is of a
two-photon process. For a certain initial atom entanglement state,
there is an entanglement sudden death effect between the two atoms.
The Kerr medium in the cavity b can effectively prevent the
undesirable entanglement sudden death from occurring. Also, from the
viewpoint of the population dynamics, we discuss why the Kerr
medium can do so. |
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Keywords: | Entanglement sudden death Jaynes--Cummings model Kerr |
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