We investigate dynamics of pairwise entanglement between two atoms for various entangled initial states. The initial entanglement shows an interesting time evolution, including entanglement sudden death. The initial portion of the excited state is responsible for the sudden death of the entanglement
Entanglement of two atoms
✍ Scribed by R. Tanaś; Z. Ficek
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 106 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0015-8208
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✦ Synopsis
Abstract
We discuss the problem of creation of entangled states in a system of two two‐level atoms which are separated by an arbitrary distance r~12~ and interact with each other via the dipole‐dipole interaction and both are driven by a laser field. The entangled antisymmetric state of the system is included throughout, even for small inter‐atomic separations. Different mechanisms leading to effective transfer of population to the antisymmetric state are identified. The steady‐state values of concurrence which is a measure of entanglement are calculated showing that perfect entanglement can be reached in case of two non‐identical atoms.
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