Quantum Mechanics in low entropic states?

I was wondering if Quantum Mechanics is predominantly a phenomenon that occurs at low entropic states?

What I mean by this is that for stochastic quantum mechanical interpretations where temperature gradients for matter govern entropic states by density or chemical reactions. Under this understanding of stochastic quantum mechanics, it seems that for localized or entangled states non-locally what can be understood is that there is a fundamental need for entropy to be governed by specific temperatures or Brownian motion to govern stochastic probabilistic distributions for stochastic processes. With the above in mind, it seems to me that quantum mechanics only applies to very specific low entropic states with temperature gradients.

Does this make any sense, and the fundamental question is what kind of influence does Quantum Mechanics have in relation with entropy not entailing chemical reactions at specific temperature gradients?