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Paper IPM / P / 15299  


Abstract:  
We consider a macroscopic quantum system subjected to an asymmetric doublewell potential in a harmonic environment. By using a timedependent approach, we calculate tunnelling probabilities for the system which contain oscillation effects. To show how one can decide between quantum mechanics and the implications of macrorealism assumptions, a given form of LeggettGarg inequality is considered. The violation of this inequality occurs for a broader range of the systemenvironment interactions, compared to previous results obtained for twolevel systems. Assuming that the coupling strength between the system and the environment can be controlled with time, one can see the violation even for strong decoherence effects. We also investigate the variation of the tilt/tunnelling parameters on the violation of LeggettGarg inequality.
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