Leggett-Garg Inequality for a Two-Level System under Decoherence: A   Broader Range of Violation
  We consider a macroscopic quantum system in a tilted double-well potential. By solving Hamiltonian equation, we obtain tunneling probabilities which contain oscillation effects. To show how one can decide between quantum mechanics and the implications of macrorealism assumption, a given form of Leggett-Garg inequality is used. The violation of this inequality occurs for a broader range of decoherence effects, compared to previous results obtained for two-level systems. 
Nasim Shahmansoori, Afshin Shafiee
quant-ph