Motivation
# more towards heat engine
Optical lattices are a widely used tool in cold-atom labs. To control the tunneling dynamics, a changeable periodicity of the lattice is desirable. This has been demonstrated by several groups [References].
This is a new approach using two Focus-Tunable Lenses forming a Galilei Telescope, which appeal is simplicity, no mechanical parts and compareably fast modulation of the lattice constant (order of few Hz).
Mineaturization of an atomic heat engine
What happens if you take an atomic heat engine to the quantum scale? ...
The Otto heat engine consists of a piston that connects a working fluid to a hot and a cold reservoir and has the ability to compress and expand the fluid.
How do you realize that in our lab?
We have a mixture experiment, there
blablabla
Theory and Experimental Realization
When two parallel laser beams with the same polarization are focused by a lens, they interfere in the focal plane producing an optical lattice (see Fig. \ref{200292}). The lattice constant d is solely dependend on the wavelength \(\lambda\) and the angle \(\theta\) between the two laser beams: