Jacob Lewis Bourjaily,

Associate Professor

of Physics

Penn State Universityand

The Niels Bohr Institute

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Jacob Bourjaily

Department of Physics

Penn State University

email: bourjaily (at) psu.edu

Introduction:I am a theoretical physicist with a joint appointment at Penn State University an the Niels Bohr Institute in Copenhagen. I completed my PhD in 2011 at Princeton University under the supervision of my advisor and collaborator Nima Arkani-Hamed at the Institute for Advanced Study, after which I spent three years at Harvard University as a Junior Fellow in the Harvard Society of Fellows.

The primary focus of my research has been the development of a recursive reformulation of perturbative quantum field theory based exclusively on physical observables, and improving the mathematical and computational tools needed to determine and evaluate scattering amplitudes in quantum field theory more generally.

This programme of research has important applications for predicting real observables for experiments such as the Large Hadron Collider at CERN, and has many deep connections to active areas of mathematical research involving graph theory, motivic cohomology, and the geometry of certain stratifications of Grassmannian manifolds.

I have also worked on string theory and particle physics phenomenology, with a particular interest in the local, geometric structures which can lead to physically interesting phenomenological models in M-theory and F-theory.

Academic Positions:

Pennsylvania State University(2020-present)

Associate Professor of Physics

Niels Bohr International Academy and Discovery Center(2014-present)Associate Professor of Physics

Harvard University(2011-2014)Junior Fellow, Harvard Society of Fellows

Education:

Princeton UniversityPh.D. in Theoretical Physics, May 2011.

M.A. in Physics, January 2008.

University of Cambridge, Trinity College

M.A.St., Masters of Advanced Studies, Mathematics (formerly CASM), June 2006.

University of Michigan, Ann Arbor

B.S. with Highest Honors in Physics, Mathematics, April 2005.

Research Funding and Grants:

Ernest Rutherford Fellowship STFC(2019-2024)

£503,405.60 (~$670,000)

Royal Society University Research Fellowship (declined)(2019)

£782,205 (~$955,600)

ERC Starting Grant(2018-23)€1,499,695 (~$1,759,000)

Villum Foundation Young Investigator Research Grant(2017-2022)

7,390,515 DKK (~$1,035,000)

Danish Council for Independent Research MOBILEX Grant(2014-17)

2,000,187 DKK (~$335,000)

Harvard University Milton Grant(2012-2014)

$40,000

Research Publications:(follow this link for an updated list)

- J. Bourjaily, S. Franco, D Galloni, and C. Wen,
Stratifying On-Shell Cluster Varieties: the Geometry of Non-Planar On-Shell Diagrams, arXiv:1607.01781 [hep-th].- N. Bjerrum-Bohr, J. Bourjaily, P. Damgaard, and B. Feng,
Analytic Representations of Yang-Mills Amplitudes, arXiv:1605.06501 [hep-th].- J. Bourjaily, P. Heslop, and V-V. Tran,
Perturbation Theory at Eight Loops: Novel Structures and the Breakdown of Manifest Conformality, arXiv:1512.07912 [hep-th].- C. Baadsgaard, N. Bjerrum-Bohr, J. Bourjaily, S. Caron-Huot, P. Damgaard, and B. Feng,
New Representations of the Perturbative S-Matrix, arXiv:1509.02169 [hep-th].- C. Baadsgaard, N. Bjerrum-Bohr, J. Bourjaily, P. Damgaard, and B. Feng,
Integration Rules for Loop Scattering Equations, arXiv:1508.03627 [hep-th].- C. Baadsgaard, N. Bjerrum-Bohr, J. Bourjaily, and P. Damgaard,
Scattering Equations and Feynman Diagrams, arXiv:1507.00997 [hep-th].- C. Baadsgaard, N. Bjerrum-Bohr, J. Bourjaily, and P. Damgaard,
Integration Rules for Scattering Equations, arXiv:1506.06137 [hep-th].- J. Bourjaily and J. Trnka,
Local Integrand Representations of All Two-Loop Amplitudes in Planar SYM, arXiv:1505.05886 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, A. Postnikov, and J. Trnka,
On-Shell Structures of MHV Amplitudes Beyond the Planar Limit, arXiv:1412.8475 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, and J. Trnka,
On the Singularity Structure of Maximally Supersymmetric Scattering Amplitudes, arXiv:1410.0354 [hep-th].- J. Bourjaily, S. Caron-Huot, and J. Trnka,
Dual-Conformal Regularization of Infrared Loop Divergences and the Chiral Box Expansion, arXiv:1303.4734 [hep-th].- J. Bourjaily,
Positroids, Plabic Graphs, and Scattering Amplitudes in Mathematica, arXiv:1212.6974 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, A. Goncharov, A. Postnikov, and J. Trnka,
Scattering Amplitudes and the Positive Grassmannian, arXiv:1212.5605 [hep-th].- J. Bourjaily, A. Dire, A. Shaikh, M. Spradlin, and A. Volovich,
The Soft-Collinear Bootstrap: N=4 Yang-Mills Amplitudes at Six and Seven Loops, arXiv:1112.6432 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, A. Hodges, and J. Trnka,
A Note on Polytopes for Scattering Amplitudes, arXiv:1012.6030 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, and J. Trnka,
Local Integrals for Planar Scattering Amplitudes, arXiv:1012.6032 [hep-th].- J. Bourjaily,
Efficient Tree Amplitudes in N=4: Automatic BCFW Recursion in Mathematica, arXiv:1011.2447 [hep-ph].- J. Bourjaily J. Trnka, A. Volovich, and C. Wen,
The Grassmannian and the Twistor String in N=4 SYM, arXiv:1006.1899 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, and J. Trnka,
Unification of Residues and Grassmannian Dualities, arXiv:0912.4912 [hep-th].- N. Arkani-Hamed, J. Bourjaily, F. Cachazo, and J. Trnka,
Local Spacetime Physics from the Grassmannian, arXiv: 0912.3249 [hep-th].- J. Bourjaily,
Effective Field Theories for Local Models in F-Theory and M-Theory, arXiv:0905.014 [hep-th].- J. Bourjaily,
Local Models in F-Theory and F-Theory with Three Generations, arXiv:0901.3785 [hep-th].- J. Bourjaily and S. Espahbodi,
Geometrically Engineerable Chiral Matter in M-Theory, arXiv:0804.1132 [hep-th].- J. Bourjaily,
Unfolding Geometric Unification in M-Theory, arXiv:0706.3364 [hep-th].- J. Bourjaily,
Geometrically Engineering the Standard Model: Locally Unfolding Three Families out ofE_{8}, arXiv:0704.0445 [hep-th]. Phys. Rev. D76:045004.- J. Bourjaily,
Multiple Unfoldings of Orbifold Singularities: Engineering Geometric Analogies to Unification, arXiv:0704.0444 [hep-th]. Phys. Rev. D79:046005.- J. Bourjaily, G. Kane, P. Kumar, and T. Wang,
Outside the mSUGRA Box;

hep-ph/0504170.- J. Bourjaily and G. Kane,
What is the Cosmological Significance of a Discovery of Wimps at Colliders or in Direct Experiments?, hep-ph/0501262.- J. Bourjaily,
Determining the Actual Local Density of Dark Matter Particles.Eur. Phys. J. C-D. Also to appear in the proceedings of ISSP 2004; astro-ph/0410470.- J. Bourjaily,
Weighing the Dark Matter Halo.To appear in "IDM 2004: The 5^{th}International Workshop on the Identification of Dark Matter," eds. N. Spooner and V. Kudryavtsev; astro-ph/0411409.

Honors and Awards:

- Simons Visiting Scientist, Galileo Galilei Institute, 2018
- Young Investigators Award, Villum Foundation, 2017
- Junior Fellow, Harvard Society of Fellows, 2011
- Marshall Scholarship, 2005
- National Science Foundation Graduate Research Fellowship, 2005-2010
- Barry M. Goldwater Scholar, 2004
- Best Student, Erice International School of Subnuclear Physics 2004
- Paul A. M. Dirac Diploma, Erice International School of Subnuclear Physics 2004
- Best Presentation of a Theoretical Subject, Erice International School for Subnuclear Physics 2004,
Weighing the Universe with Colliders and Detectors- Writ and Mary Cornwell Fellowship, University of Michigan Department of Physics
- Margaret Hunt Scholarship, University of Michigan College of Literature Science and the Arts, covering full tuition and most living expenses
- Outstanding Achievement in Mathematics Award, University of Michigan Department of Mathematics
- Frank C. Mock Fellowship, University of Michigan Department of Physics
- Otto Graf Scholarship, University of Michigan Honors College
- Arthur B. Singleton Distinguished Class Prize, University of Michigan College of Engineering, awarded to the most outstanding first year engineering student
- Roger B. Chaffee Astronaut Memorial Scholar
- Kikuchi Memorial Scholar, University of Michigan Department of Nuclear Engineering and Radiological Sciences
- Continuous Merit Scholarship, University of Michigan Department of Nuclear Engineering and Radiological Sciences
- Elks National Foundation Most Valuable Student Scholarship, 2002
- American Nuclear Society Scholarship
- United States Department of Energy Nuclear Engineering Fellowship
- National Academy for Nuclear Training Scholarship
- University of Michigan Alumni Association Scholarship
- University of Michigan Club of Grand Rapids Scholarship
- James B. Angell Scholar, College of Literature, Science and the Arts
- William J. Branstrom Freshman Prize, University of Michigan
- George M. Landes Prize for Technical Communication (Second Place)
- University of Michigan Regents Merit Scholarship
- Thomas Strach Award for Excellence in Amateur Astronomy, Grand Rapids Amateur Astronomical Association
- First Prize, Undergraduate Book Collecting Contest for the collection
Landmarks in the History of Math and Science- Eagle Scout, Boy Scouts of America

Professional and Honorary Societies:

- Harvard Society of Fellows
- Michigan Center for Theoretical Physics
- American Physical Society
- American Mathematical Society
- Mathematical Association of America
- American Nuclear Society
- American Chemical Society
- Phi Beta Kappa, National Honor Society
- Sigma Pi Sigma, National Physics Honor Society
- Alpha Nu Sigma, National Honor Society for Nuclear Science
- Golden Key, National Academic Honor Society
- Delta Epsilon Iota, National Academic Honor Society
- Phi Kappa Phi, National Honor Society

News and Updates:Added a list of still outstanding banknotes featuring scientists, mathematicians and science-related material.

Updated my banknote collection, adding a fifth page.

website last updated:

15^{th}January 2016