Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information: Concepts and Methods II
Q 11.8: Vortrag
Montag, 8. März 2010, 18:15–18:30, E 214
Entanglement between Atoms in a Diatomic Molecule — •Nathan Harshman1,2 and William Flynn1 — 1Department of Physics, American University, Washington, DC, USA — 2Institut für Quantenphysik, Universität Ulm, D-89069 Ulm, Germany
Entanglement between atoms in an idealized diatomic molecule in one-dimension is investigated. Trapped and free molecules and homonuclear and heteronuclear molecules are considered. The entanglement between the atoms for coherent states, number states, and superpositions of number states can be calculated analytically from the position wave function in atomic coordinates. Entanglement between atoms occurs in the ground state and other coherent states unless the molecular frequency and the trap frequency are the same. In number states, the exact functional dependence of entanglement depends in a complicated way on the ratio of the frequencies and the ratio of the masses. Generally, states with high numbers, large frequency differences, and equal masses have increased entanglement. While the interatomic entanglement can be quite large even in the coherent states, the covariance in position observables can be entirely explained by a classical model with appropriately chosen statistical uncertainty.