I am currently developing a new computational procedure to do quantum
simulation of few interacting electrons system at finite temperature.
To do this I solve the time–dependent Schrödinger equation using
the finite difference time domain method (FDTD) and compute thermal
density matrix. From this density matrix I then determine
thermodynamical properties, such as partition function, free energy and
entropy as a function of temperature. Recent preliminary test results
show that the numerical procedure and my computer program successfully
produce thermodynamical properties of few electrons systems in one, two
and three dimensions.
+ Water-Graphite Interaction
I use ab initio quantum chemistry packages, such as Gaussian98
to compute interaction energy of a water molecule with a
surface. The interaction energy is then used in molecular
simulation to study adsorption of water molecules on the
surface. I use DL_POLY program for molecular
simulation. For molecular
visualization, I use
+ Building a linux cluster
I have successfully built a cluster of computers using computers in
The cluster consists of 5 computers: 1 dual intel xeon 2.8 GHz processor computer,
2 intel pentium 3.2 GHz processor computer,1 intel xeon 2.0 GHz processor computer, and 1 intel pentium IV 1.8 GHz processor computer. All computers connected to a D-link gigabit ethernet switch and each computer has a gigabit ethernet card.
Physics Live CD
+ Finite Difference Time Domain
I have created an FDTD program for 3D electromagnetic wave
propagation. I used the FDTD program mainly for investigating the
approximation for scattering of heterogeneous particle.
+ Effective medium approximation (EMA)
Using the FDTD program for 3D electromagnetic wave
propagation, scattering of a EM plane wave by a spherical particle is
simulated. One can then obtain scattering properties as well as the
electric fields inside and outside the particle. From distribution of
electric fields one can defined an effective medium.
+ Mie Scattering in An Absorbing Medium
+ Quantum Monte Carlo (QMC) Program
Other Research Interests
Simulation of Physical Systems
+ Wave Propagation in Random Media
+ Optical Microscopy
+ Alternative Energy Source
I W. Sudiarta and D. J. W. Geldart, "The Finite Difference Time Domain Method for Solving The Schrödinger Equation for Many Particles in One Dimension" Am J. Phys. To be Submitted, 2007.
I W. Sudiarta and D. J. W. Geldart, " Numerical Method for Computing Single-Particle Density Matrix" J. Phys. A: Math. Theor. Submitted, 2007.
I W. Sudiarta and D. J. W. Geldart, "Solving the Schrödinger equation using the finite difference time domain method" J. Phys. A: Math. Theor. 40 1885-1896, 2007
I Wayan Sudiarta and D J Wallace Geldart, "Solving the Schrödinger equation using the finite difference time domain method" J. Phys. A: Math. Theor. 40 1885-1896, 2007 doi:10.1088/1751-8113/40/8/013
I.W. Sudiarta and D.J.W. Geldart, "Interaction Energy of a Water Molecule with a Single-Layer Graphitic Surface Modeled by Hydrogen- and Fluorine-Terminated Clusters",
I. W. Sudiarta, " Effective medium approximation for light scattering of heterogeneous particles", PhD Thesis, Dalhousie University, 2003.
I.W. Sudiarta and P. Chylek, "Mie-scattering formalism for spherical particles embedded in an absorbing medium", J. Opt. Soc. Am. A 18 (6): 1275-1278 (2001).
I.W. Sudiarta and P. Chylek, "Mie scattering efficiency of a large spherical particle embedded in an absorbing medium", J. Quant. Spectrosc. Radiative Transfer, 70 (4-6): 709-714 (2001).
I. W. Sudiarta, "Confocal microscopy with a CCD camera", Honour thesis, the University of Sydney, 1998.
+ Finite Difference Time Domain Method Computer Program (C language: fdtdv1.zip)
+ Mie Scattering in Absorbing Medium (Mathematica notebook: absmie.nb)
+ Effective Medium Approximations (Mathematica notebook: emas.nb)