Carnegie Mellon University

Tina Kahniashvili

Associate Research Professor

Astrophysics & Cosmology
Wean Hall 8020


Prof. Tina Kahniashvili

Education & Professional Experience

PhD: Russian Academy of Sciences (1988)
Habilitation: Lebedev Institute of Physics (Russia), Physics & Mathematical Scienes (2000)

Professional Societies:
American Physical Society, American Astronomical Society


Curriculum ViTAE

Associate Research Professor, Carnegie Mellon University, 2013–
Professor of Physics and Astronomy, Ilia State University (Georgia), 2010–
Visiting Research Professor, Carnegie Mellon University, 2010–12
Visiting Professor, Carnegie Mellon University, 2009–10
Adjunct Professor, Laurentian University (Canada), 2008–
Associate Professor, Ilia State University (Georgia), 2008–10
Visiting Professor, Kansas State University, 2007–08
Research Scientist, CCPP, New York University, 2006–07
Associate Research Professor, Kansas State University, 2005–06
Research Associate, Kansas State University, 2003–05
Leading Staff Scientist, Abastumani Astrophysical Observatory, 2002–07
Senior Research Scientist, Abastumani Astrophysical Observatory, 1993–2002
Researcher, Abastumani Astrophysical Observatory (Georgia), 1988–93

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

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, T. Kahniashvili, S. Mandal, A. Roper Pol, A.G. Tevzadze, T. Vachaspati, The dynamo effect in decaying helical turbulence, Phys. Rev. Fluids 4, 024608 (2019)

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)

A. Brandenburg, J. Schober, I. Rogachvski, T. Kahniashvili, et al., The Turbulent Chiral Magnetic Cascade in the Early Universe, Astrophys. J. Lett. 845, 2, L21 (2017)

Axel Brandenburg, Tina Kahniashvili, Alexander G. Tevzadze, Nonhelical inverse transfer of a decaying turbulent magnetic fieldPhys. Rev. Lett. 114, 75001 (2015)

Leonard Kisslinger, Tina Kahniashvili, Polarized gravitational waves from cosmological phase transitionsPhys. Rev. D 92, 43006 (2015)

Tina Kahniashvili, Yurii Maravin, George Lavrelashvili, Arthur Kosowsky, Primordial magnetic helicity constraints from WMAP nine-year dataPhys. Rev. D 90, 83004 (2014)

Tina Kahniashvili, Alexander Tevzadze, Axel Brandenburg, Andrii Neronov, Evolution of primordial magnetic fields from phase transitionsPhys. Rev. D 87, 83007 (2013)

More Publications: