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Department of Physics

Professor Calvin W. Johnson

Web pages


     Some amusing quotes about research

     In the department of self-promotion (which actually I shy away from but....)

   "Seven things about...." from SDSU News Center

    Science fiction and the human condition


         Oct 9, 2017: A new paper on the arXiv, "Transition sum rules in the shell model."

        Sept 14, 2017: My story, "Of the Beast in the Belly," has been anthologized in an audiobook collection, "Year's Top Hard Science Fiction Stories."

       Sept 13, 2017: A new paper on the arXiv, "Projection of angular momentum by linear algebra," co-written with former SDSU physics major Kevin O'Mara

       Sept 12, 2017: Congratulations to Raul Herrera, (UCSD physics grad student but part of my group) who has been awarded a U.S. Department of Energy (DOE) Office of Science Graduate Student Research (SCGSR) grant to spend 4 months at Lawrence Berkeley National Lab working on his thesis research, focusing on Gamow-Teller transitions above A = 65. These are highly competitive grants, and winning one is a tremendous achievement!

       Aug 9, 2017:  I have a chapter in a book coming out, also available on the arXiv: "The anatomy of atomic nuclei."  In addition, a new preprint is posted on the arXiv: "Tracing the evolution of nuclear forces under the similarity renormalization group"

       March 5, 2017: My talk "Ab initio rotational bands in medium and heavy nuclei" from the TRIUMF workshop on "Progress on Ab Initio Techniques in Nuclear Physics"  on is now available online.

      Feb 22, 2017: Congratulations to Jordan Fox for winning a Parallel Computing Summer Research Internship at Los Alamos National Lab!

      Feb 3, 2017: The paper on backbending has been published and is selected as an Editor's suggestion!

     July 5, 2016:  An e-print, "Quasi-dynamical symmetries in backbending the chromium isotopes," by Raul Herrera and C. W. Johnson has been posted on the arXiv.

     May, 2016: I have been awarded 30 MILLION core-hours for computation via ALCC (ASCR Leadership Computing Challenge)

     Aug 31, 2015:  "Systematics of strength function sum rules," : Phys. Lett. B 750, 72 (2015).

     March 11, 2015: "Spin-orbit decomposition of ab initio nuclear wavefunctions" : Phys. Rev. C 91, 034313 (2015)

     November 5, 2014: I have a science fiction story appearing in the December issue of ANALOG SCIENCE FICTION AND FACT.  You can read a sample of it here.

     August 18, 2014: I have started a blog, for posting essays on science, science fiction, and related topics.

     August 7, 2014: Micah Schuster (Ph.D student) wins award for best     summer student research poster at Lawrence Livermore National Lab. He also won the past two years.

Recent publications

    "Quasidynamical symmetries in the chromium isotopes," Phys. Rev. C 95, 024303 (2017).

    "Systematics of strength function sum rules,": Phys. Lett. B 750, 72 (2015).

    "Spin-orbit decomposition of ab initio nuclear wavefunctions" C. W. Johnson  Phys. Rev. C 91, 034313 (2015)

    "Isoscalar and isovector pairing in a formalism of quartets," M. Sambataro, N. Sandulescu, and C. W. Johnson, Phys. Lett B 740, 137 (2015).

       "Testing the spin-cutoff parameterization with shell-model calculations," W. M. Spinella and C. W. Johnson, Phys. Rev. C 90, 014315 (2014), see also arXiv:1304.7746

        "Operator evolution for ab initio theory of light nuclei" M. D. Schuster,  S. Quaglioni, C. W. Johnson, E. D. Jurgenson, and P. Navratil, Phys. Rev. C 90,  011301(R) (2014), see also arXiv:1402:7106

    "Factorization in large-scale many-body calculations," C. W. Johnson, W. E. Ormand, and P. G. Krastev, Comp. Phys. Comm. 184, 2761-2774 (2013), see also arXiv:1303:0905    This paper describes the algorithms underlying the BIGSTICK shell-model code, at the heart of much of our research.

   Other recent writing

        "The Age of Discovery" (fiction, To Shape the Dark)

        "Of the Beast in the Belly" (fiction at Asimov's SF magazine)

        "Lives of the Elementary Particles" (fiction)

        "What the Higgs Boson Means to Me" (poetry)