Coupled quantized mechanical oscillators

@article{Brown2011CoupledQM,
  title={Coupled quantized mechanical oscillators},
  author={Kenneth R. Brown and Christian Ospelkaus and Yves Colombe and A C Wilson and Dietrich Leibfried and David J. Wineland},
  journal={Nature},
  year={2011},
  volume={471},
  pages={196-199}
}
The harmonic oscillator is one of the simplest physical systems but also one of the most fundamental. It is ubiquitous in nature, often serving as an approximation for a more complicated system or as a building block in larger models. Realizations of harmonic oscillators in the quantum regime include electromagnetic fields in a cavity and the mechanical modes of a trapped atom or macroscopic solid. Quantized interaction between two motional modes of an individual trapped ion has been achieved… 

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