  We investigate the motion of a colloidal particle driven out of equilibrium
by an external torque. We use the molecular dynamics simulation that is
alternative to the numerical integration approach based on the Langevin
equation and is expected to mimic an experiment more realistically. We choose a
heat bath composed of thousands of particles interacting to each other through
the Lennard-Jones potential and impose the Langevin thermostat to maintain it
in equilibrium. We prepare a single colloidal particle to interact with the
particles of the heat bath also by the Lennard-Jones potential while any
dissipative force and noise are not employed. We prepare the simulation
protocol fit to the overdamped limit in real experiments by increasing the size
and mass of the colloidal particle. We study the stochastic properties of the
nonequilibrium fluctuations for work and heat produced incessantly in time. We
accurately confirm the fluctuation theorem for the work production. We show our
results to agree accurately with those from the numerical integration of the
Langevin equation.
