14 citations · 32 across the 5 of their papers we have counts for
5 papers
Spectral taxonomy for quartic systems: fundamental clock, parity, and continuum
Teepanis Chachiyo
A symmetric quartic potential is a physics model with expansive applications, ranging from broadband energy harvesters, quantum tunneling in molecules and the early universe, to to…
Simple and accurate complete elliptic integrals for the full range of modulus
Teepanis Chachiyo
The complete elliptic integral of the first and second kind, K(k) and E(k), appear in a multitude of physics and engineering applications. Because there is no known closed-form, th…
Unifying pendulum-like dynamical regimes via complex time
Teepanis Chachiyo
We present an alternative derivation of exact solutions for pendulum-like systems across all dynamical regimes using a standard technique in undergraduate mathematical physics cour…
Understanding electron correlation energy through density functional theory
Teepanis Chachiyo, Hathaithip Chachiyo
A curious behavior of electron correlation energy is explored. Namely, the correlation energy is the energy that tends to drive the system toward that of the uniform electron gas.…
Simple and accurate exchange energy for density functional theory
Teepanis Chachiyo, Hathaithip Chachiyo
A non-empirical exchange functional based on an interpolation between two limits of electron density: slowly varying limit and asymptotic limit, is proposed. In the slowly varying…