Professor Richard Easther

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Head of Department

Biography

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.

Research areas

  • 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)

  • 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), 022-022. 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
  • Aslanyan, G., Easther, R., & Price, L. C. (2015). Learn-as-you-go acceleration of cosmological parameter estimates. Journal of Cosmology and Astroparticle Physics, 2015 (9).10.1088/1475-7516/2015/09/005
    URL: http://hdl.handle.net/2292/28448
  • Aslanyan, G., & Easther, R. (2015). Signatures of the very early Universe: Inflation, spatial curvature, and large scale anomalies. Physical Review D, 91 (12), 123523-1-123523-8. 10.1103/PhysRevD.91.123523
    URL: http://hdl.handle.net/2292/27983
  • Price, L. C., Frazer, J., Xu, J., Peiris, H. V., & Easther, R. (2015). MULTIMODECODE: an efficient numerical solver for multifield inflation. Journal of Cosmology and Astroparticle Physics, 2015 (03).10.1088/1475-7516/2015/03/005
    URL: http://hdl.handle.net/2292/28794
  • Price, L. C., Peiris, H. V., Frazer, J., & Easther, R. (2015). Gravitational wave consistency relations for multifield inflation. Physical Review Letters, 114 (3), 031301-1-031301-6. 10.1103/PhysRevLett.114.031301
    URL: http://hdl.handle.net/2292/27978
  • Abazajian, K. N., Aslanyan, G., Easther, R., & Price, L. C. (2014). The Knotted Sky II: Does BICEP2 require a nontrivial primordial power spectrum?. Journal of Cosmology and Astroparticle Physics, 2014 (8).10.1088/1475-7516/2014/08/053

Identifiers

Contact details

Primary location

SCIENCE CENTRE - MATHPHYSIC - Bldg 303
Level 6, Room 601
38 PRINCES ST
AUCKLAND 1010
New Zealand

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