Professor Richard Easther
I grew up in New Zealand, and was educated at the University of Canterbury. After graduating with my PhD 1994 I held post-doctoral fellowships at Waseda University in Japan and at Brown and Columbia Universities in the United States.
I was a professor at Yale University from 2004 until the end of 2011, when I returned to New Zealand. I am now a professor and Head of the Department of Physics here at the University of Auckland.
Research | Current
My work focuses on the physics of the very early universe. I explore the cosmological implications of string theory and the inflationary epoch, a period of accelerated expansion immediately after the big bang thought to set the stage for the subsequent evolution of the universe.
I am interested in the evolution of the universe during the "primordial dark ages" between the end of inflation and the nucleosynthesis era, a period a few minutes after the big bang when chemical elements more complicated than hydrogen are first formed.
The growth of cosmological perturbations during this phase depends on the nature of dark matter and other phenomena outside the "standard model" of particle physics, allowing cosmology to reveal unknown particle physics.
- The physics of the very early universe
- Inflationary cosmology
- The cosmological implications of string theory
- The multiverse and eternal inflation
- Astrophysical tests of models of the early universe
- Dark matter and cosmological observables
Selected publications and creative works (Research Outputs)
- Niemeyer, J. C., & Easther, R. (2019). Inflaton Clusters and Inflaton Stars. Arxiv Related URL.
- Zagorac, J. L., Easther, R., & Padmanabhan, N. (2019). GUT-scale primordial black holes: Mergers and gravitational waves. Journal of Cosmology and Astroparticle Physics (6)10.1088/1475-7516/2019/06/052
- Shandera, S., Adshead, P., Amin, M., Dimastrogiovanni, E., Dvorkin, C., Easther, R., ... Hanany, S. (2019). Probing the origin of our Universe through cosmic microwave background constraints on gravitational waves. Arxiv Related URL.
- Edwards, F., Kendall, E., Hotchkiss, S., & Easther, R. (2018). PyUltraLight: A pseudo-spectral solver for ultralight dark matter dynamics. Journal of Cosmology and Astroparticle Physics (10)10.1088/1475-7516/2018/10/027
- Musoke, N., & Easther, R. (2017). Expectations for inflationary observables: simple or natural?. Journal of Cosmology and Astroparticle Physics, 2017 (12), 032-032. 10.1088/1475-7516/2017/12/032
Other University of Auckland co-authors: Nathan Musoke
- Aslanyan, G., Price, L. C., Adams, J., Bringmann, T., Clark, H. A., Easther, R., ... Scott, P. (2016). Ultracompact minihalos as probes of inflationary cosmology. Physical Review Letters, 117 (14).10.1103/PhysRevLett.117.141102
- Canac, N., Aslanyan, G., Abazajian, K. N., Easther, R., & Price, L. C. (2016). Testing for new physics: Neutrinos and the primordial power spectrum. Journal of Cosmology and Astroparticle Physics, 2016 (09)10.1088/1475-7516/2016/09/022
- Price, L. C., Peiris, H. V., Frazer, J., & Easther, R. (2016). Designing and testing inflationary models with Bayesian networks. Journal of Cosmology and Astroparticle Physics, 2016 (02), 049-049. 10.1088/1475-7516/2016/02/049