There is something mysterious and extraordinary in the universe. We see strong signs that there is a new form of substance that does not interact strongly with light, and therefore it is invisible to us. Physicists call it dark matter. The amazing fact is that our calculations show that there are five times more dark matter than the ordinary substance that we are made of.
Dark matter can be the key to understanding the universe from the smallest scale (the scale of elementary particles) to the largest scale (the scale of the universe itself). Therefore, it is no surprise that, right now, there are several operative experiments trying to detect dark matter in different ways on earth.
My students and I work in several different ways to investigate or put restrictions on different models of dark matter. Part of our efforts is focused on developing theoretical techniques that can help experimental physicists find dark matter constituents. For Example: If particles of dark matter are sufficiently light, they can interact with atoms when they hit the ground. My team performs numerical calculations on supercomputers, simulating the path and spreading of billions of dark particles hitting the earth. Our goal is to know the exact spectrum of such particles when they arrive at the detectors. Therefore, we collaborate with experimental physicists investigating dark matter and we suggest ways that will increase the probability that these experiments can find dark matters.
Another focus of our research is related to the effect that dark matter can have on stars. In particular; dark matter can cause the collapse of neutron stars, which are transformed into black holes. It can also create its own "dark stars". We study how these exotic stars could be formed after the Big Bang, and we try to find ways to examine them using experiments that detect gravitational waves generated by the merging of black holes, neutron stars and possibly dark Stars. We also try to impose restrictions on new gravity theories using experimental data from high-precision atomic clocks.
Professional profile and collaborators at SDU: Physics Community