Efficient and robust entanglement generation in a many-particle system with resonant dipole-dipole interactions

Details Efficient and robust entanglement generation in a many-particle system with resonant dipole-dipole interactions Efficient and robust entanglement generation in a many-particle system with resonant dipole-dipole interactions

2001-11-19

arxiv.org/abs/quant-ph/0111095v1

Physics

Quantum Physics

4 figures

Scientific paper

10.1103/PhysRevA.66.032109

We propose and discuss a scheme for robust and efficient generation of many-particle entanglement in an ensemble of Rydberg atoms with resonant dipole-dipole interactions. It is shown that in the limit of complete dipole blocking, the system is isomorphic to a multimode Jaynes-Cummings model. While dark-state population transfer is not capable of creating entanglement, other adiabatic processes are identified that lead to complex, maximally entangled states, such as the N-particle analog of the GHZ state in a few steps. The process is robust, works for even and odd particle numbers and the characteristic time for entanglement generation scales with N^a, with a being less than unity.

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