12 citations · 76 across the 16 of their papers we have counts for
16 papers
A Variational Perturbation Approach to One-Point Functions in QFT
Wen-Fa Lu
In this paper, we develop a variational perturbation (VP) scheme for calculating vacuum expectation values (VEVs) of local fields in quantum field theories. For a comparatively gen…
Sine-Gordon Expectation Values of Exponential Fields With Variational Perturbation Theory
Wen-Fa Lu
In this paper, expectation values of exponential fields in the 2-dimensional Euclidean sine-Gordon field theory are calculated with variational perturbation approach up to the seco…
Sine-Gordon Effective Potential beyond Gaussian Approximation
Wen-Fa Lu, Chul Koo Kim, Kyun Nahm
Combining an optimized expansion scheme in the spirit of the background field method with the Coleman's normal-ordering renormalization prescription, we calculate the effective pot…
Optimized Rayleigh-Schrödinger Expansion of the Effective Potential
Wen-Fa Lu, Chul Koo Kim, Kyun Nahm
An optimized Rayleigh-Schrödinger expansion scheme of solving the functional Schrödinger equation with an external source is proposed to calculate the effective potential beyond th…
A Variational Perturbation Approximation Method in Tsallis Non-Extensive Statistical Physics
Wen-Fa Lu
For the generalized statistical mechanics based on the Tsallis entropy, a variational perturbation approximation method with the principle of minimal sensitivity is developed by ca…
Gaussian Effective Potential and the Coleman's normal-ordering Prescription : the Functional Integral Formalism
Wen-Fa Lu, Chul Koo Kim
For a class of system, the potential of whose Bosonic Hamiltonian has a Fourier representation in the sense of tempered distributions, we calculate the Gaussian effective potential…