Spectroscopy of systems of two identical atoms: effects of quantum interference
1 Institute for Spectroscopy RAS, 108840 Moscow, Troitsk, Russia
2 Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
3 Russian Quantum Center, 143025 Skolkovo, Russia
* Corresponding author: email@example.com
Published online: 13 December 2016
Several effects of quantum interference in spectroscopy of a system of two atoms are discussed. (i) In the system of spatially separated atoms in a one-dimensional (1D) geometry (a single-mode waveguide or photon crystal), a (meta)stable excited entangled state can be formed, its decay being very sensitive to the distance between the atoms and to perturbations which cause a difference between their resonance frequencies. (ii) In a system of closely located atoms in 3D space, the extreme sensitivity of absorption and fluorescence spectra to the direction of the applied magnetic field is demonstrated. These theoretical predictions can be useful for the quantum information processing and ultrasensitive measurements.
© The Authors, published by EDP Sciences, 2017
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