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The concept of consCiousness existing outside the body (e.g. near-death
and out-of body experiences, NDE/OBEs, or after death, indicative of a 'soul') is a
staple of religious traditions, but shunned by conventional science because of an
apparent lack of rational explanation. However conventional science based entirely
on classical physics cannot account for normal in-the-brain consciousness. The
Penrose-Hameroff 'Orch OR' model is a quantum approach to consciousness, connecting
brain processes (microtubule quantum computations inside neurons) to
fluctuations in fundamental spacetime geometry, the fine scale structure of the universe.
Recent evidence for significant quantum coherence in warm biological systems,
scale-free dynamics and end-of-life brain activity support the notion of a
quantum basis for consciousness which could conceivably exist independent of
biology in various scalar planes in spacetime geometry. Sir Roger Penrose does not
necessarily endorse such proposals which relate to his ideas in physics. Based on
Orch OR, we offer a scientific hypothesis for a 'quantum soul'.