These are excerpts and elaborations from my book "The Nature of Consciousness"
|
Bose-Einstein Condensates Possibly the most popular
candidate to yield quantum consciousness has been Bose-Einstein condensation (theoretically
predicted in 1925 and first achieved in a gas in 1995). The most popular
example of Bose-Einstein condensation is superconductivity. The fascination with
Bose-Einstein condensates is that they are the most highly ordered structures in
nature (before their discovery in 1925 by Albert Einstein and Satyendranath
Bose, that record was owned by
crystals). The order is such that each of their constituents appears to occupy
all their space and all their time: for all purposes the constituents of a
Bose-Einstein condensate share the same identity. In other words, the constituents behave just like one constituent
(the photons of a laser beam behave just like one photon) and the Bose-Einstein
condensate behaves like one single particle. Another odd feature of
Bose-Einstein condensates is that they seem to possess a primitive form of free
will. A Bose-Einstein condensate is the equivalent of
a laser, except that it is the atoms, rather than the photons, that behave
identically, as if they were a single atom. Technically speaking, as
temperature drops, each atom's wave grows, until the waves of all the atoms
begin to overlap and eventually merge. After they have merged, the atoms are
located within the same region in space, they travel at the same speed, they
vibrate at the same frequency, etc.: they become indistinguishable. The atoms
have reached the lowest possible energy, but Heisenberg's principle makes it impossible for this to be zero energy: it is
called "zero-point" energy, the minimum energy an atom can have. The first Bose-Einstein condensate was created in 1995
by the US physicists Eric Cornell and Carl Wieman. In 2003 both the Austrian physicist Rudolf Grimm and the US physicist Deborah
Jin achieved a Bose-Einstein super
molecule, i.e. a collection of molecules (not just atoms) behaving in perfect
unison. The intriguing feature of a Bose-Einstein condensate is that the many
parts of a system not only behave as a whole, they become a whole. Their
identities merge in such a way that they lose their individuality. It was thought that
Bose-Einstein condensation could be achieved only at very low temperatures. The
British physicist Herbert Froehlich (Long-range coherence and
energy storage in biological systems, 1968) proved the feasibility, and even
the likelihood, of Bose-Einstein condensation at body temperatures in living
matter (precisely, in cell membranes). This opened the doors to the possibility
that all living systems contain Bose-Einstein condensates. He argued that electrically
charged molecules of living tissues behave like electric dipoles. When
digestion of food generates enough energy, all molecular dipoles line up and
oscillate in a perfectly coordinate manner, which may result in a Bose-Einstein condensate. Biological oscillators of
this kind are pervasive in nature: living matter is made of water and other
biomolecules equipped with electrical dipoles, which react to external stimuli
with a spontaneous breakdown of their rotational symmetry. The biological usefulness of
such biological oscillators is that, like laser light, they can amplify signals
and encode information (e.g., they can "remember" an external
stimulus). Above all, coherent
oscillations are crucial to many processes of integration of information in the
brain. Back to the beginning of the chapter "A Physics Of Consciousness" | Back to the index of all chapters |
|
|
|
|