Carnegie Mellon University

Tina Kahniashvili

Associate Research Professor

Astrophysics & Cosmology
Wean Hall 8020


Prof. Tina Kahniashvili

Education & Professional Experience

Doctor of Sciences, Physical and Mathematical Sciences (2000), The Lebedev Physical Institute, Russian Academy of Sciences
Ph.D. Physics (1988) Space Research Institute, Russian Academy of Sciences

Professional Societies:
American Physical Society, American Astronomical Society
IAU International Astronomical Union


Curriculum ViTAE

Associate Research Professor, Carnegie Mellon University, 2013–
Main Scientist, Abastumani Astrophysical Observatory (Georgia) 2020–
Professor of Physics and Astronomy, Ilia State University (Georgia), 2010–
Visiting Research Professor, Carnegie Mellon University, 2010–2012
Visiting Professor, Carnegie Mellon University, 2009–2010
Adjunct Professor, Laurentian University (Canada), 2008–2021
Associate Professor, Ilia State University (Georgia), 2008–2010
Visiting Professor, Kansas State University, 2007–2008
Research Scientist, CCPP, New York University, 2006–2007
Associate Research Professor, Kansas State University, 2005–2006
Research Associate, Kansas State University, 2003–2005
Leading Staff Scientist, Abastumani Astrophysical Observatory, 2002–2007
Senior Research Scientist, Abastumani Astrophysical Observatory, 1993–2002
Researcher, Abastumani Astrophysical Observatory (Georgia), 1988–1993

Research Interests

In the last decade, high quality cosmological data has greatly improved our understanding of physical processes in the Universe. It seems that cosmology is now in a "golden epoch", with observations of the cosmic microwave background (CMB), large scale structure distribution, gravitational lensing, and other observational data supporting a consistent "standard" model of the universe that may be valid from very large scales down to small scales, from today back to the very far past. Cosmological observations planned in the near future will provide data of even higher quality, improving further our current knowledge of the origin, structure, and evolution of the Universe. On the other hand, High Energy Particle Physics and High Energy Astrophysics are relevant for several issues arising in the cosmology of the early Universe.

My main research includes investigations of physical processes in the Universe at very early epochs as well as at late times. In particular, I study (i) fundamental symmetry tests at very high energies (early epochs of the universe expansion) using available data of astrophysical, cosmological, and particle physics experiments; (ii) gravitational wave signals from the very early universe (inflation, phase transitions); (iii) CMB fluctuations beyond standard cosmological models. I am interested in alternative scenarios to explain the accelerated expansion of the universe, such as modifications of general relativity (especially massive gravity models). From the astrophysics side, I am working on cosmological magnetic fields and the origins, evolution, and observable signatures of primordial turbulence.

Recent Publications

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A. Brandenburg, G. Gogoberidze, T.  Kahniashvili, S. Mandal, A. Roper Pol, Circular polarization of gravitational waves from early-Universe helical turbulence, Phys. Rev. Research 3, 013193 (2021)

A. Brandenburg, R. Durrer, Y. Huang, T. Kahniashvili, S. Mandal, S. Mukohyama, Primordial magnetic helicity evolution with a homogeneous magnetic field from inflation, Phys. Rev. D 102, 023536 (2020)

A. Roper Pol, S. Mandal, A. Brandenburg, T. Kahniashvili, A. Kosowsky, Numerical simulations of gravitational waves from early-universe turbulence, Phys. Rev. D 102, 083512 (2020)

A. Brandenburg, R. Durrer, T. Kahniashvili, S. Mandal, W.W. Yin, Statistical Properties of Scale-Invariant Helical Magnetic Fields and Applications to Cosmology, JCAP 08, 034 (2018)

A. Brandenburg, T. Kahniashvili, S. Mandal, A. Roper Pol, A. Tevzadze, T. Vachaspati, Evolution of Hydromagnetic Turbulence from Electroweak Phase Transitions, Phys. Rev. D 96, 123528 (2017)

T. Kahniashvili, A. Brandenburg, R. Durrer, A. Tevzadze, W. Yin, Scale-invariant helical magnetic field evolution and the duration of inflation, JCAP 12, 002 (2017)

Axel Brandenburg, Tina Kahniashvili, Classes of hydrodynamic and magnetohydrodynamic turbulent decayPhys. Rev. Lett. 118, 055102 (2017)

More Publications: