A toy model for Macroscopic Quantum Coherence
  The present article deals with Macroscopic Quantum Coherence resorting only to basic quantum mechanics. A square double well is used to illustrate the Leggett-Caldeira oscillations. The effect of thermal-radiation on two-level systems is discussed to some extent. The concept of decoherence is introduced at an elementary level. Handles are deduced for the energy, temperature and time scales involved in Macroscopic Quantum Coherence. 
R. Mu\~noz-Vega, Jos\'e-Job J. Flores-Godoy, G. Fern\'andez-Anaya and   Encarnaci\'on Salinas-Hern\'andez
quant-ph