Entanglement sudden birth and sudden death in a system of two distant
atoms coupled via an optical element
- URL: http://arxiv.org/abs/2003.03650v1
- Date: Sat, 7 Mar 2020 19:58:32 GMT
- Title: Entanglement sudden birth and sudden death in a system of two distant
atoms coupled via an optical element
- Authors: Maryam Ashrafi and M. H. Naderi
- Abstract summary: Investigation is reported of the collective effects and the dynamics of atom entanglement in a system of two distant two level atoms.
We show that the evolution of the entanglement is sensitive not only to the interatomic distance but also to the initial state of the system.
- Score: 1.8275108630751844
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: An investigation is reported of the collective effects and the dynamics of
atom atom entanglement in a system of two distant two level atoms which are
coupled via an optical element. In the system under consideration, the two
atoms, which are trapped in the foci of a lens, are coupled to a common
environment being in the vacuum state and they emit photons spontaneously. A
fraction of the emitted photons from each atom is thus focused on the position
of the other atom. The presence of optical element between two distant atoms
leads to the occurrence of delayed collective effects, such as delayed dipole
dipole interaction and delayed collective spontaneous emission, which play the
crucial role in the dynamical behavior of the entanglement. We discuss the
phenomena of entanglement sudden birth, entanglement sudden death, and revival
of entanglement for both cases of initial one photon and initial two photon
unentangled atomic states. We show that the evolution of the entanglement is
sensitive not only to the interatomic distance but also to the initial state of
the system as well as to the properties of the optical element.
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