Dissipative Quantum Model Of Brain Research Articles

Matter, mind and consciousness: from information to meaning.

This is a perspective on some theoretical studies obtained in the framework of the dissipative quantum model of brain. The formation of long range neuronal correlations is described in terms of quantum field theory mechanisms operating in systems with a huge number of degrees of freedom. Memory states are constructed through the condensation in the lowest energy state of quanta associated to the long range correlations. Many properties derived from such a modeling are discussed, also in relation with classical/quantum modeling interplay. The brain flexibility in responding to incoming inputs producing novel correlation patterns is attributed to the chaotic character of trajectories or paths through the memory states. A relevant role in the model is played by the fact that the brain is permanently open to its environment. The brain/mind activity is thus described in the formalism of dissipative systems, also accounting for the formation of the meanings of the information carried by the perceptual experiences. A recent novel description of criticality in brain activity during dreaming, meditation and non-ordinary brain states is briefly mentioned. In the model, it is proposed that consciousness finds its origin in the permanent dialog or interaction of the brain with its environment. Although a long way has been done, much work is still necessary to understand the extraordinary functional properties of brain.

Entanglement and Phase-Mediated Correlations in Quantum Field Theory. Application to Brain-Mind States

The entanglement phenomenon plays a central role in quantum optics and in basic aspects of quantum mechanics and quantum field theory. We review the dissipative quantum model of brain and the role of the entanglement in the brain-mind activity correlation and in the formation of assemblies of coherently-oscillating neurons, which are observed to appear in different regions of the cortex by use of EEG, ECoG, fNMR, and other observational methods in neuroscience.

QUANTUM NOISE INDUCED ENTANGLEMENT AND CHAOS IN THE DISSIPATIVE QUANTUM MODEL OF BRAIN

We discuss some features of the dissipative quantum model of brain in the frame of the formalism of quantum dissipation. Such a formalism is based on the doubling of the system degrees of freedom. We show that the doubled modes account for the quantum noise in the fluctuating random force in the system-environment coupling. Remarkably, such a noise manifests itself through the coherent structure of the system ground state. The entanglement of the system modes with the doubled modes is shown to be permanent in the infinite volume limit. In such a limit the trajectories in the memory space are classical chaotic trajectories.

The dissipative quantum model of brain: how does memory localize in correlated neuronal domains

The mechanism of memory localization in extended domains is described in the framework of the parametric dissipative quantum model of brain. The size of the domains and the capability in memorizing depend on the number of links the system is able to establish with the external world.

ERRATA: FORMATION AND LIFE-TIME OF MEMORY DOMAINS IN THE DISSIPATIVE QUANTUM MODEL OF BRAIN

Some recent developments of the dissipative quantum model of brain are reported. In particular, the time-dependent frequency case is considered with its implications on the different life-times of the collective modes.

FORMATION AND LIFE-TIME OF MEMORY DOMAINS IN THE DISSIPATIVE QUANTUM MODEL OF BRAIN

We show that in the dissipative quantum model of brain the time-dependence of the frequencies of the electrical dipole wave quanta leads to the dynamical organization of the memories in space (i.e., to their localization in more or less diffused regions of the brain) and in time (i.e., to their longer or shorter life-time). The life-time and the localization in domains of the memory states also depend on internal parameters and on the number of links that the brain establishes with the external world. These results agree with the physiological observations of the dynamic formation of neural circuitry which grows as brain develops and relates to external world.

Quantum dissipation and Neural Net Dynamics

Inspired by the dissipative quantum model of brain, we model the states of neural nets in terms of collective modes by the help of the formalism of Quantum Field Theory. We exhibit an explicit neural net model which allows to memorize a sequence of several informations without reciprocal destructive interference, namely we solve the overprinting problem in such a way last registered information does not destroy the ones previously registered. Moreover, the net is able to recall not only the last registered information in the sequence, but also anyone of those previously registered.