This paper deals with macroscopic quantum coherence while using only basic quantum mechanics. A square double well is used to illustrate Leggett-Caldeira oscillations. The effect of thermal radiation on two-level systems is discussed. The concept of decoherence is introduced at an elementary level. Reference values are deduced for the energy, temperature and time scales involved in macroscopic quantum coherence. © 2013 IOP Publishing Ltd.
Muñoz-Vega, R., Flores-Godoy, J. J., Fernández-Anaya, G., & Salinas-Hernández, E. (2013). A toy model of a macroscopic quantum coherent system. European Journal of Physics, 393-414. https://doi.org/10.1088/0143-0807/34/2/393