there is no scientific consensus or empirical evidence supporting the existence of a "quantum brain" as a distinct entity. The concept of a quantum brain is often discussed in the context of quantum consciousness or quantum cognition, which proposes that quantum phenomena play a role in brain function and cognitive processes.
A non-quantum brain, on the other hand, refers to the current understanding of the brain as a classical biological system governed by the principles of classical physics and biochemistry. It operates based on the interactions of neurons, synaptic connections, and electrochemical signals.
The key difference between a quantum brain and a non-quantum brain lies in the underlying mechanisms and principles assumed to govern their operations. Proponents of the quantum brain hypothesis suggest that quantum phenomena, such as quantum superposition and entanglement, may be involved in cognitive processes like perception, decision-making, and consciousness. This hypothesis attempts to explain aspects of cognition that are challenging to account for solely based on classical physics.
It's important to note that the concept of a quantum brain is highly speculative, and there is currently limited empirical evidence to support it. While quantum effects have been observed in certain biological systems, such as photosynthesis in plants, their relevance and significance in the context of brain function are still subjects of scientific investigation and debate.