ทฤษฎีการอินทิเกรตตามเส้นทางเบื้องต้น

Abstract

       The method of Feynman in evaluationg the particle propagator is reviewed. According to Feynman's ideas, apart from classical path, there are many possible paths of a partlcle to go from polnt a to point b in a given time interval. The propagator is the summation of the probability amplitude of all possible paths. By replacing the summation with integration the calculation can be done. Furthermore, lhe obrained propagator also leads ro lhe wave functions and energy of the system.