  In this paper, we have worked on the possibility of setting up an Bell's
inequality violating experiment in the context of primordial cosmology
following the fundamental principles of quantum mechanics. To set up this
proposal we have introduced a model independent theoretical framework using
which we have studied the creation of new massive particles for the scalar
fluctuations in the presence of additional time dependent mass parameter. Next
we explicitly computed the one point and two point correlation functions from
this setup. Then we comment on the measurement techniques of isospin breaking
interactions of newly introduced massive particles and its further prospects.
After that, we give an example of string theory originated axion monodromy
model in this context. Finally, we provide a bound on the heavy particle mass
parameter for any arbitrary spin field.
