Dipole-dipole interaction between orthogonal dipole moments in time-dependent geometries

Abstract

In two nearby atoms, the dipole-dipole interaction can couple transitions with orthogonal dipole moments. This orthogonal coupling accounts for a number of interesting effects, but strongly depends on the geometry of the setup. Here, we discuss several setups of interest where the geometry is not fixed, such as particles in a trap or gases, by averaging over different sets of geometries. Two averaging methods are compared. In the first method, it is assumed that the internal electronic evolution is much faster than the change of geometry, whereas in the second, it is vice versa. We find that the orthogonal coupling typically survives even extensive averaging over different geometries, albeit with qualitatively different results for the two averaging methods. Typically, one- and two-dimensional averaging ranges modelling, e.g., low-dimensional gases, turn out to be the most promising model systems.

11 pages, 14 figures

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Cited by in corpus (5)

• Dipole blockade in a cold Rydberg atomic sample
• Quantum entanglement and disentanglement of multi-atom systems
• Delayed birth of distillable entanglement in the evolution of bound entangled states
• Measurement of distance and orientation of two atoms in arbitrary geometry
• Dynamical creation of entanglement versus disentanglement in a system of three - level atoms with vacuum - induced coherences