What is the difference between the three types of bosonic reservoirs : sub-ohmic, ohmic and super-ohmic?

03 March 2018 0 1K Report

I want to ask what is the difference between the three types of bosonic reservoirs that we use in the theory of quantum decoherence: sub-ohmic, ohmic and super-ohmic. I know that there is a parameter "s" that changes in the mathematical relation of the spectral density; for s = 1, the reservoir is of ohmic type, for 0 < s < 1, the reservoir is sub-ohmic and for s > 1, the reservoir is called super-ohmic. But what is the physical meaning of each type ?

Help!!

Thanks in advance.

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