  The gut-brain axis is the communication link between the gut and the brain.
Although it is known that the gut-brain axis plays a pivotal role in
homeostasis, its overall mechanism is still not known. However, for neural
synapses, classical molecular communication is described by the formation of
ligand-receptor complexes, which leads to the opening of ion channels.
Moreover, there are some conditions that need to be fulfilled before the
opening of the ion channel. In this study, we will consider the gut-brain axis,
where neurotransmitters diffuse through the synaptic cleft, considering
molecular communication. On the vagus nerve (VN) membrane, i.e., the
post-synaptic membrane of the synapse, it undergoes a quantum communication
(QC), which initiates the opening of the ion channel, thus initiating the
communication signal from the gut to the brain. It evolves a new paradigm of
communication approach, Molecular Quantum (MolQ) communication. Based on the QC
model, we theoretically analyzes the output states, and QC is simulated
considering the incoming neurotransmitter's concentration and validated by
analyzing the entropy and the mutual information of the input, i.e.,
neurotransmitter's concentration, and output, i.e., ion channel opening.
