I am a theoretical cosmologist. My research focuses on connections between high energy physics and the cosmology of the very early universe. Some of the research questions I am currently exploring include: What are the dynamical processes by which different vacua of a theory can be accessed? Could there be directly observable effects of eternal inflation? What types of cosmologies are consistent with the existence of extra dimensions? What might it mean to make predictions in an eternally inflating universe?
Read some popular accounts of my research here:
A. Aguirre, M. C. Johnson, and M. Larfors, Runaway dilatonic domain walls, arXiv:0911.4342 [hep-th] (2009).
A. Aguirre and M. C. Johnson, A status report on the observability of cosmic bubble collisions, arXiv:0908.4105 [hep-th] (2009).
S. M. Carroll, M. C. Johnson, and L. Randall, Dynamical compactification from de Sitter space, JHEP 11, 094 (2009), arXiv:0904.3115 [hep-th].
S. M. Carroll, M. C. Johnson, and L. Randall, Extremal limits and black hole entropy, JHEP 11, 109 (2009), arXiv:0901.0931 [hep-th].
A. Aguirre, M. C. Johnson, and M. Tysanner, Surviving the crash: assessing the aftermath of cosmic bubble collisions, Phys. Rev. D79, 123514 (2009), arXiv:0811.0866 [hep-th].
M. C. Johnson and M. Larfors, An obstacle to populating the string theory landscape, Phys. Rev. D78, 123513 (2008), arXiv:0809.2604 [hep-th].
M. C. Johnson and M. Larfors, Field Dynamics and tunneling in a flux landscape, Phys. Rev. D78, 083534 (2008), arXiv:0805.3705 [hep-th].
M. C. Johnson and M. Kamionkowski, Dynamical and Gravitational Instability of Oscillating-Field Dark Energy and Dark Matter, Phys. Rev. D78, 063010 (2008), arXiv:0805.1748 [hep-th].
A. Aguirre and M. C. Johnson, Towards observable signatures of other bubble universes II: Exact solutions for thin-wall bubble collisions, Phys. Rev. D77, 123536 (2007), arXiv:0712.3038 [hep-th].
A. Aguirre, M. C. Johnson, and A. Shomer, Towards observable signatures of other bubble universes, Phys. Rev. D76, 063509 (2007), arXiv:0704.3473 [hep-th].
A. Aguirre, S. Gratton, and M. C. Johnson, Measures on Transitions for Cosmology in the Landscape, Phys. Rev. Lett. 98, 131301 (2007), hep-th/0612195.
A. Aguirre, S. Gratton, and M. C. Johnson, Hurdles for Recent Measures in Eternal Inflation, Phys. Rev. D75, 123501 (2007), hep-th/0611221.
T. Banks, M. C. Johnson, and A. Shomer A Note on Gauge Theories Coupled to Gravity, JHEP 09, 049 (2006), hep-th/0606277.
T. Banks, A. Aguirre, and M. C. Johnson, Regulating Eternal Inflation II: The Great Divide, JHEP 08, 065 (2006), hep-th/0603107.
A. Aguirre and M. C. Johnson, Two Tunnels to Inflation, Phys. Rev. D73, 123529 (2006), gr-qc/0512034.
T. Banks and M. C. Johnson, Regulating Eternal Inflation, hep-th/0512141 (2005).
A. Aguirre and M. C. Johnson, Dynamics and instability of false vacuum bubbles, Phys. Rev. D72, 103525 (2005), gr-qc/0508093.
T. Bogdan et al., Waves in the magnetized solar atmosphere II: Waves from localized sources in magnetic flux concentrations, ApJ, 599, 626 (2003).
T. Bogdan et al., Waves in magnetic flux concentrations, Astronomische Nachrichten, 323, 196 (2002).