
Professor
Education
Ph.D.  Physics  California Institute of Technology  1993 
M.S.  Physics  California Institute of Technology  1988 
B.S.  Mathematics  Valparaiso University  1985 
B.S.  Physics  Valparaiso University  1985 
Biography
Gerald Cleaver is a Professor of Physics at Baylor University. He is a member of the Physics Department’s High Energy Physics group and also heads the Early Universe Cosmology and String Theory division of Baylor’s Center for Astrophysics, Space Physics, and Engineering Research. Gerald earned his Ph.D. at Caltech in 1993, where he studied under John H. Schwarz, one of the founders of string theory. Cleaver has written over 70 peerreviewed journal papers and conference proceedings, which have received over 1300 total citations. He is the author of three book chapters and a coauthor of one book.
Academic Interests and Research
Gerald Cleaver’s specialty is Superstring Theory, which unifies all forces in nature (gravity, electromagnetics, and the two nuclear forces). In superstring theory each elementary particle in nature originates as a distinct vibration of a single type of string (or loop) of energy, much as different musical notes are produced from a single violin string. Gerald’s current research topics in string theory include the construction of phenomenologically realistic superstring models, string/Mtheory cosmology, and the string landscape. With former postdoc Tibra Ali (now at the Perimeter Institute in Canada) Cleaver investigated halfflat manifolds for heterotic strings. With his undergraduate and graduate students, Cleaver is conducting a longterm systematic study of the global physical properties of the string landscape in the freefermionic heterotic region, including patterns in flat directions in the effective field theories, hidden sector condensates, and supersymmetry breaking. Cleaver is a member of the XP4 division of Icarus Interstellar, a nonprofit organization created by his Ph.D. graduate Dr. Richard Obousy. Members of XP4 are exploring advanced propulsion systems and energy generation concepts for interstellar spacecraft, including possible string/Mtheory realization of the Alcubierre effect.Research Interests
Theoretical Particle Physics
* Phenomenology of String Derived Models
* Observable/Hidden Sector Mirror Models
* MTheory Phenomenology
Division of CASPER
* String/M Landscape Investigations
* Casimir Effects in Branes
* String and Brane Cosmology
Icarus Interstellar XP4
* Alcubierre Warp Effect
* MatterAntimatter Propulsion Systems
Selected Publications
Gauge Models in DDimensions, Mod. Phys. Lett. A28 (20113) 1350055,
by Doug Moore, Jared Greenwald, and Gerald Cleaver.
Initial Systematic Investigation of the Landscape of Low Layer NAHEVariation Extensions, arXiv:1111.1917. submitted to Euro. Phys. Journal C,
by Jared Greenwald, Doug Moore, Tim Renner, and Gerald Cleaver.
Initial Systematic Investigation of the Landscape of Low Layer NAHE Extensions, Euro. Phys. J. C72 (2012) 2167; arXiv:1111.1263,
by Jared Greenwald, Doug Moore, Tim Renner, and Gerald Cleaver
Algorithm for Determining U(1) Charges in Free Fermionic Heterotic String Models, submitted to J. of Undergraduate Res. in Physics, arXiv:1108.4082,
by
William Hicks, Leslie Vestal, Jared Greenwald, Doug Moore, Tim Renner, and
Gerald Cleaver.
Systematic Investigations of the Free Fermionic Heterotic String Gauge Group Statistics: Layer One Results, Mod. Phys. Lett. A26 (2011) 4451, arXiv:1107.5758,
by
Doug Moore, Jared Greenwald, Tim Renner, Matt Robinson, Cameran Buescher,
Michael Janas, Gunner Miller,
Scott Ruhnau, and Gerald Cleaver.
Redundancies in Explicitly Constructed Ten Dimensional Heterotic String Models, Intl. J. of Mod. Phys. A26 (2011) 4451, arXiv:1107.3138,
by T. Renner, Jared Greenwald, Doug Moore, and Gerald Cleaver.
Investigations of QuasiRealistic Heterotic String Models with Reduced Higgs Spectrum, Euro. Phys. J. C71 (2011) 1842, arXiv:1105.0447,
by
Alon Faraggi, Jared Greenwald, Doug Moore, Kristen Pechan, Eric Remkus, Tim
Renner, and Gerald Cleaver
Note on a NAHE Variation, Nucl. Phys. B850 (2011) 445, arXiv:0912.5207 [hepph],
by Jared Greenwald, Kristen Pechan, Tim Renner, Tibra Ali, and Gerald Cleaver
Branes in the MD x Md+ x Md Compactification of type II string on S1 /Z2 and their cosmological applications, JHEP 10 (2009) 095; arXiv: 0907.1756 [hepph],
by Michael Devin, Tibra Ali, Gerald Cleaver, Anzhong Wang, and Qiang Wu.
A NonStandard String Embedding of E8, Mod. Phys. Lett. A24 (2009) 15771582; arXiv: 08101038 [hepph],
by Richard Obousy, and Matthew Robinson, and Gerald Cleaver.
Free Fermionic Heterotic Model Building and Root Systems, Mod. Phys. Lett. A20 (2009) 27032715; arXiv: 0809.5094 [hepth],
by Matthew Robinson, Gerald Cleaver, and Markus Hunziker.
Radius Destabilization in Five Dimensional Orbifolds from Lorentz Violating Fields, Mod. Phys. Lett. A24 (2009) 14951506; arXiv: 0805.0019 [grqc],
by Richard Obousy and Gerald Cleaver.
QuasiRealistic HeteroticString Models with Vanishing OneLoop Cosmological Constant and Perturbatively Broken Supersymmetry? Phys. Rev. D78 (2008) 046009; arXiv:0802.0470 [hepth],
by Gerald B. Cleaver, Alon E. Faraggi, Elisa Manno, and Cristina Timirgaziu.
A Note on the Standard Embedding on HalfFlat Manifolds, JHEP 0807 (2008) 121; arXiv:0711.3248 [hepth],
by Tibra Ali and Gerald B. Cleaver.
Warp Drive: A New Approach, J. Brit. Interplanetary Soc. September, 2008; arXiv:0712.1649 [grqc],
by Richard Obousy and Gerald Cleaver.
A Simple Introduction to Particle Physics: Part II. Geometric Foundations, Gauge Theories, and Relativity, Book draft; arXiv:0908.1395 [hepth],
by Matthew Robinson, Tibra Ali, and G. Cleaver.
Symmetry and the Standard Model, (Springer, New York, 2011),
by Matthew Robinson, Karen Bland, Gerald Cleaver, Jay Dittmann, and Mario Serna.
In Search of the (Minimal Supersymmetric) Standard Model String. Chapter 2 of String Theory Research Progress, F. Balogh, ed., (Nova Science Publishers, New York, 2008); hepph/0703027,
by Gerald Cleaver.
Current Graduate Students
Jared Greenwald
Doug Moore
Yanbin Deng
Branden Mattingly
Current Undergraduate Students
Drake Gates
Past Graduate Students
Tim Renner, Ph.D. 2011, Dissertation: Initial Systematic Investigations of the Weakly Coupled Free Fermionic Heterotic String Landscape Statistics
Kristin Pechan, M.S. 2010, Thesis: Investigation of Low Higgs Models in Weakly Coupled Free Fermionic Heterotic String Theory
Matt Robinson, Ph.D. 2009, Dissertation: Towards a Systematic Investigation of Weakly Coupled Free Fermionic Heterotic String Gauge Group Statistics
Richard Obousy, Ph.D. 2008, Dissertation: Investigations into Compactified Dimensions: Casimir Energies and Phenomenological Aspects
Ben Dundee, M.S. 2006, Dissertation: Grand Unified Theoreis in Higher Dimensions: From the Heterotic String to RandallSundrum
John Perkins, Ph.D. 2005, Thesis: Aspects of String Phenomenology at the SelfDual Radius
Courses Taught
PHY 1420  General Physics IPHY 1430  General Physics II
PHY 3372  Intro Quantum Mechanics I
PHY 3373  Intro Quantum Mechanics II
PHY 4373  Intro Nuclear & Particle Physics
PHY 5370  Quantum Mechanics I
PHY 5371  Quantum Mechanics II
PHY 5381  Special Topics: String Cosmology
PHY 5V95  Graduate Research in Superstrings
PHY 5V99  Thesis in Superstrings
PHY 6373  Quantum Field Theory I
PHY 6374  Quantum Field Theory II
PHY 6375  Quantum Field Theory III
PHY 6V99  Dissertation
HON 3200  Honors Colloquium
BIC 4389  Senior Capstone
Professional Activities
Gerald Cleaver is a member of American Physical Society, Sigma Phi Sigma, the American Association of Physics Teachers, and the Mathematical Association of America. He is a Fellow of the American Scientific Affiliation.
Cleaver is a physics textbook reviewer for McGrawHill and Thomas Learning, was a consultant and contributor to McGrawHill’s Grade Summit Project, a reviewer for Pearson Education Texas K12 science textbooks, and a member of the Texas State Review Panel for Supplementary high school science material. He is a referee for Physical Review Letters, European Physical Journal, Modern Physics Letters A, General Relativity & Gravity, Acta Astronautica, Physics Essays, ISRN Mathematical Physics, and Scientific Journals International. Cleaver is a frequent judge at local, regional, and state Science and Engineering Fairs.
Awards
Gerald Cleaver is a member of several honor societies including Sigma Pi Sigma Physics H.S., Sigma Xi Science H.S., Sigma Rho Phi Science and Theology H.S., Mortar Board, and Alpha Lambda Delta. He was a recipient of a Mensa graduate fellowship and Presidential and Valparaiso University scholarships and was a National Merit Scholar. Cleaver received the Lumina Award for Academic Excellence at Valparaiso. He is a current or past member of Mensa, the Triple9 Society, the International Society for Philosophical Enquiry, and the Prometheus Society.
Hobbies and Interests
RadioControlled Model Aviation, Tae Kwon Do, Sailing, SCUBA, Snow Skiing, & Scouting