Central European Institute for Cosmology and Fundamental Physics

Sohyun Park

PhD:  University of Florida, 2012
2017-  Institute of Physics, Czech Academy of Sciences; Postdoc 
2015-16 Korea Astronomy and Space Science Institute, Postdoc
2012-15 Institute of Gravitation and Cosmos, Pennsylvania State University; Postdoc
Email: cnex@smh.pm
Phone: +420 26605 3028
Address: Office 58
Na Slovance 1999/2
182 21 Praha 8, Czech Republic

My research interests lie in the interface between quantum field theory and cosmology. In particular, I am working on quantum loop effects in the inflationary era and cosmological perturbations in modified theories of gravity.
Quantum fluctuations are vastly amplified during inflation because the rapid expansion alters the energy-time uncertainty principle in such a way that virtual particles live longer than in flat space. I primarily aim to quantify these quantum gravitational effects by calculating loop corrections to the correlation functions of primordial density perturbations.
I am interested in various types of modified gravity models describing either dark energy or dark matter (preferably both). I am currently developing the theory of cosmological perturbations and performing phenomenological tests on those models.

Selected Publications

  • S. Park, T. Prokopec and R. P. Woodard, Quantum Scalar Corrections to the Gravitational Potentials on de Sitter background,
JHEP (2016) [arXiv:1510.03352 [gr-qc]].
  • S. Boran, E. O. Kahya and S. Park, Quantum gravity corrections to the conformally coupled scalar self-mass-squared on de Sitter background,
Phys. Rev. D (2014) [arXiv:1409.7753 [gr-qc]].

For a complete list of publications see INSPIRE-HEP.