1.6k citations · 2.9k across the 39 of their papers we have counts for
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quant-ph1997★ 24 cited
A new approximation scheme in quantum mechanics
Sang Koo You, Kwang Joe Jeon, Chul Koo Kim +1
An approximation method which combines the perturbation theory with the variational calculation is constructed for quantum mechanical problems. Using the anharmonic oscillator and…
hep-th1997★ 6 cited
The O(N) Nonlinear Sigma Model in the Functional Schrödinger Picture
Dae Kwan Kim, Chul Koo Kim
We present a functional Schrödinger picture formalism of the (1+1)-dimensional nonlinear sigma model. The energy density has been calculated to two-loop order using the wav…
cond-mat.str-el1997
Finite temperature many-particle theory of condensed matter systems in the functional Schroedinger picture
Hyun Sik Noh, Sang Koo You, Chul Koo Kim
A finite temperature many-particle theory of condensed matter systems is formulated using the functional Schroedinger picture. Using the interacting electron gas as a model system,…