Abstract

A theoretical framework called "Quantum Brain Dynamics" to describe long range ordered dynamics of the quantum system of electromagnetic field and water dipole field in the brain is proposed as a revival of the original idea developed by Umezawa in the early 1960s. Based on Umezawa’s world view of quantum field theory, the manifestation of long range ordered dynamics is a macroscopic object of quantum origin, and so it reveals the existence of specific macroscopic objects in the brain called "tunneling photon water." Tunneling photon water is shown to manifest several interesting quantum phenomena involving coherent photon emission and transmission, and is suggested to play an important role in quantum brain dynamics. The ordered quantum dynamics of such a macroscopic condensate of tunneling photons with nonvanishing effective charge and mass as tunneling photon water is governed by the macroscopic Schrödinger equation, and ensures superconducting phenomena in the brain at body temperature. The meaning of quantum brain dynamics is clearly explained for brain and cognitive scientists who have been confused by either the overstatement with misplaced quantum concepts usually given by those not appropriately schooled in physics or the understatement with textbook quantum concepts given by technical physicists