Sunday, April 12, 2009

A plausible explanation of decoherence in quantum systems

Quantum computing pundits and entrepreneurs have, thus far, failed to bring into being a robust quantum computing system that can solve NP-complete problems.

The key/main stumbling block in their path is the inexplicable onset of decoherence in the quantum computing systems they fashion to solve intractable problems.

To describe decoherence succinctly: Quantum data (which is measured in qubits) is extremely volatile/fragile, and it easily vaporizes, or dissipates into its environment during a computational process, before any decipherable output is produced (which results in the output of incomplete and incorrect results). This is known as decoherence in the field of quantum computing.

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I was hunting for the possible causes of decoherence, and I think that I found a plausible cause of the phenomenon in a theory propounded by Messrs. John Conway and Simon Kochen, which they coined The Free Will Theorem.

The gist of the Conway-Kochen Free Will Theorem (which is, by the way, thoroughly enthralling) is this: Messrs. Conway and Kochen say they have proved that if human beings have free will, then elementary particles—like atoms, photons and electrons—possess free will as well.

Applied within the context of quantum computing: If we postulate that The Free Will Theorem holds, and if we assume that human beings have free will, then we can deduce that atoms, photons and electrons also have free will. Hence, this implies that decoherence in quantum computing systems is caused by atoms, photons and electrons that exercise their power of free will and choose not to be harnessed to manipulate data.

Kind of spooky isn't it?