https://gdpark.blog/tags/approximation-methods/Recent content in Approximation-Methods on gdpark.blogHugoenSat, 26 Dec 2015 00:00:00 +0000https://gdpark.blog/posts/quantum-mechanics-34-the-variational-principle/Fri, 25 Dec 2015 00:00:00 +0000https://gdpark.blog/posts/quantum-mechanics-34-the-variational-principle/The variational principle is basically gambling — guess a trial wave function, compute its energy expectation value, and it’ll always come out bigger than the true ground state energy.https://gdpark.blog/posts/quantum-mechanics-35-the-wkb-approximation-wentzel-kramers-brillouin/Sat, 26 Dec 2015 00:00:00 +0000https://gdpark.blog/posts/quantum-mechanics-35-the-wkb-approximation-wentzel-kramers-brillouin/A casual walkthrough of the WKB approximation — your go-to tool when V(x) changes slowly — tackling both bound states and tunneling in one shot.