Ground-state energy eigenvalue calculation of the quantum mechanical well $V(x)=1\mathrm{/}2k{x}^2+\lambda x^4$ via analytical transfer matrix method

The analytical transfer matrix technique is applied to the Schr"{o}dinger equation of symmetric quartic-well potential problem in the form $V(x)=1\mathrm{/}2k{x}^2+\lambda x^4\mathrm{.}$ This gives quantization condition from which we can calculate the ground-state energy eigenvalues numerically. We also compare the results with those obtained from numerical shooting method, perturbation theory, and WKB method.