https://gdpark.blog/tags/ground-state-energy/Recent content in Ground State Energy on gdpark.blogHugoenFri, 25 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.