2. The­o­ret­i­cal Back­ground

The Mi­ata-light in­ter­ac­tion is ob­vi­ously de­scribed by the two pil­lars of mod­ern physics, spe­cial rel­a­tiv­ity and quan­tum me­chan­ics. Since the reader is surely well aware of quan­tum elec­tro­dy­nam­ics, ei­ther in Feyn­man’s path in­te­gral ap­proach or in canon­i­cal for­mu­la­tion, it needs no in­tro­duc­tion. How­ever, a few key re­sults will be sum­ma­rized in sub­sec­tions 2.1 and 2.2 for ready ref­er­ence. For more in­for­ma­tion, see [2, pp. 1-152]. A more eas­ily ac­ces­si­ble source may be [8].