In this paper we will propose the first — to our knowledge — method that finds the global optimum of the TSP by reducing the NP complexity of the problem to N2 complexity. We achieve this by using white light interferometry
(WLI)[14]. From the mathematical point of view we unfortunately haven’t disapproved the commonly believed conjecture that NP 6= P (the Clay mathematics institute set out a price of 1.000.000 US-$ for doing that) but we apparently reduced the complexity by a trick, namely replacing operations by photons (and the physics of interference).

In section 2 we introduce the method as a gedankenexperiment[thought experiment in friendly german]....
http://www.opticsexpress.org/abstract.cfm?id=140598

Just cool. It reminds me of the often forgotten analogue computers. They are very rarely used in practice these days, although they could be used to solve predefined probles fast, furious and sparkling.

With the introduction of uncertainty and loops you could get some very interesting results. Just think about the offspring of a theremin and a miniMoog on acid. Raving BEAM bots? Pacifist fighter drones?