John Giblin

Research Interests

Cosmology represents a bridge between fundamental physics and particle phenomenology. The goal of the contemporary cosmologist is to search for models of the early universe that satisfy the current observational tests and to search for new ways to discriminate between these models. I am interested in how gravity and quantum field theory can lead to natural models of the early universe and specifically how these models might emerge from various extensions of the standard Model. I am also very interested in how observations of both electromagnetic and gravitational radiation can identify viable cosmological scenarios.

Cosmology is at a stage in which precise calculations and predictions are necessary to discern between different models. I am particularly interested in tackling those questions that can be answered by numerical analysis or computer simulation. The particular computational tools I employ vary from project to project and include lattice simulations (including spectral methods), finite-element analysis, Monte-Carlo parameter estimation, and multi-processor computing.

Positions Held

• 2011- Department of Physics, Case Western Reserve University Adjunct Assistant Professor of Physics
• 2009- Department of Physics, Kenyon College Assistant Professor of Physics
• 2008-2009 Department of Physics and Astronomy, Bates College Visiting Assistant Professor of Physics

Awards

• National Science Foundation High-Energy Theory Award, Competitive Grant, $75,000 US, The National Science Foundation (awarded and pending)
• Cottrell College Science Award, Competitive Grant, $35,000 US, The Research Corporation

Recent Publications

• John T. Giblin, Jr and Janine Shertzer, Long-Lived Positronium and AGN Jets, Submitted to ApJ Letters
• Diana Battefeld, Thorsten Battefeld, John T. Giblin Jr., Evan K. Pease, Observable Signatures of Inflaton Decays, JCAP 1102:024,2011, arXiv: 1012.1372
• Gravitational Radiation from Preheating with Many Fields, John T. Giblin Jr, Larry R. Price, Xavier Siemens, arxiv:astro-ph.CO/1006.0935
• How to Run Through Walls: Dynamics of Bubble and Soliton Collisions, John T. Giblin Jr, Lam Hui, Eugene A. Lim, I-Sheng Yang, arxiv:hep-th/1005.3493
• Richard Easther, John T. Giblin Jr, Lam Hui, Eugene A. Lim, A New Mechanism for Bubble Nucleation: Classical Transitions, Phys.Rev.D80:123519,2009, arXiv: 0907.3234
• Diana Battefeld, Thorsten Battefeld, John T.Giblin Jr, On the Suppression of Parametric Resonance and the Viability of Tachyonic Preheating after Multi-Field Inflation, Phys. Rev. D 79, 123510 (2009), arXiv: 0904.2778
• Richard Anantua, Richard Easther, John T. Giblin Jr, GUT-Scale Primordial Black Holes: Consequences and Constraints, Phys.Rev.Lett.103:111303,2009, arXiv: 0812.0825
• Richard Easther, John T. Giblin Jr, Eugene A. Lim, Wan-Il Park, Ewan D. Stewart, Thermal Inflation and the Gravitational Wave Background, JCAP 0805:013,2008, arXiv: 0801.4197
• Richard Easther, John T. Giblin Jr, Eugene A. Lim, Gravitational Waves From the End of Inflation: Computational Strategies, Phys.Rev.D77:103519,2008, arXiv: 0712.2991
• Richard Easther, John T. Giblin Jr, Eugene A. Lim, Gravitational Wave Production At The End Of Inflation, Phys.Rev.Lett.99:221301,2007, arXiv: astro-ph/0612294
• Yin Hung, Bradley Schuller, John T. Giblin Jr, Janine Shertzer, Quantum calculation of cold-atom diffraction using periodic magnetic fields, Phys. Rev. A 73, 062722 (2006)
• Richard Easther, John T Giblin Jr, The Hubble Slow Roll Expansion for Multi Field Inflation, Phys.Rev. D72 (2005) 103505, arXiv: astro-ph/0505033
• John T. Giblin Jr, Andrew D. Hwang, Spacetime Slices and Surfaces of Revolution, J.Math.Phys. 45 (2004) 4551, arXiv: gr-qc/0406010
• John T. Giblin Jr, Donald Marolf, Robert H. Garvey, Spacetime Embedding Diagrams for Spherically Symmetric Black Holes, Gen.Rel.Grav. 36 (2004) 83-99, arXiv: gr-qc/0305102

Seminars

• Gravitational Waves from Cosmological Phase Transitions
• Gravitational Waves from GUT-Scale Phase Transitions, Cambridge University, PASCOS 2011
• A review of preheating, Cambridge University, Astronomy/Physics Seminar
• Gravitational Waves: A New Window on the Early Universe, College of the Holy Cross, Colloquium
• Bubbles in Eternal Inflation: A Classic(al) Effect, Instituto de Ciencias Nucleares, UNAM, GR-19 Parallel Talk
• Bubbles in Eternal Inflation: A Classic(al) Effect, Department of Physics, University of Michigan Ann Arbor, MI, Cosmology Journal Club Seminar
• Bubbles in Eternal Inflation: A Classic(al) Effect, Case Wesern Reserve University, Particle/Astrophysics and CERCA Seminar
• Bubbles in Eternal Inflation: A Classic(al) Effect, University of Geneva, SÃ??Ã?´eminare de Cosmologie et Physique des Particules
• Bubbles in Eternal Inflation: A Classic(al) Effect, CERN, Cosmology Seminar
• Gravitational Waves: A new view of the Universe, Denison University, Physics Department Colloquium
• Computational Challenges in Bubble Collisions, Columbia University, ISCAP/Yale Bubble Workshop
• Bubbles in Eternal Inflation: a Classic(al) Effect, University of Wisconsin Milwaukee, Gravitation Seminar
• Preheating with many fields, University of Wisconsin, Milwaukee, Gravitation Group Seminar
• Precision simulations of bubble collisions in eternal inflation, DESY, PASCOS '09
• Precision simulations of bubble collisions in eternal inflation, ICTP, Workshop on Eternal Inflation, Contributed Seminar
• Gravitational Radiation from Primordial Black Holes, University of Wisconsin Milwaukee, Colloquium
• Gravitational Waves: A new view of the Universe, Kenyon College, Physics Department Seminar
• Gravitational Radiation from Primordial Black Holes, Vancouver British Columbia, TEXAS 08
• Gravitational Waves: A new view of the Universe, Smith College, Astronomy and Physics Department Seminar
• Gravitational Radiation from Preheating, Madison Wisconsin, Cosmo '08
• Gravitational Radiation from Preheating, University of Wisconsin Milwaukee, Gravitation Seminar
• Gravitational Waves: A new view of the Universe, Bates College, Department Seminar
• Gravitational Radiation from Preheating, Syracuse University, High Energy/Cosmology Seminar
• Gravitational Radiation from Preheating, Columbia University, ISCAP Seminar
• Gravitational Radiation from Preheating, University of Massachusetts, High Energy/Nuclear Seminar
• PIRSA:09070011, Bubbles in Eternal Inflation: A Classic(al) Effect, 2009-07-23, Holographic Cosmology Workshop
• PIRSA:09010004, Gravitational radiation from the decay of primordial black holes, 2009-01-06, Cosmology
• PIRSA:08060134, Gravitational Radiation from Preheating, 2008-06-03, PASCOS 08
• PIRSA:07120026, Gravitational Radiation from Preheating, 2007-12-05,