Prof. Lawrence Horwitz

חוג לפיזיקה ואסטרונומיה אמריטוס
Prof. Lawrence Horwitz
Phone: 03-6408636
External phone: 03-9086506
Fax: 03-9097743
Office: Shenkar Physics, 206


Prof. Lawrence Horwitz has continued studies of  a consistent classical and quantum theory in the framework of special  relativity. It has resulted in a new proof of a theorem used to find the ground state energy of a many-body system and a new stability analysis in statistical mechanics. He has studied a recent experiment showing interference in time and explained the results in terms of this theory. The theory for a proposed experiment which should demonstrate entanglement of correlated spins (such as spin up-spin down combinations to form spin zero) separated in time was also worked out by Horwitz using the formulation of spin in this theory, resulting in a prediction that could be verified in experiment. He has recently embedded the theory into general relativity as a complete classical and quantum theory, and applications have been worked out, such as dynamical effects in the neighborhood of a black hole horizon, scattering and gauge theory forming a basis for the recent development of an approach to modified Newtonian law behavior of galaxies with anomalous rotation curves. Another topic in his interest has been that of unstable systems. A known theory developed for the description of resonances in classical wave systems was generalized to be applicable to quantum systems. In this form, he developed a theory in which resonances can be represented by actual states in the quantum Hilbert space, providing, for example, a basis for the applicability of particle sum rules. Finally, a new approach to standard Hamiltonian dynamics, embedding it into geometrical form was formulated, making available a criterion for stability based on the local deviation of orbits.


  • BSEP NYU College of Engineering, Engineering Physics 1948-1952

  • A.M Harvard University, Physics, 1952-1954

  • Ph.D. Harvard University, Theoretical, 1954-1957

Academic Appointments

  • Member and visiting professor, Institute for Advanced Study, Princeton, N.J., 1993, 1996, 1999, 2003

  • Research, Department of Physics, University of Ariel, Ariel, 2004-Present

  • Particle Physics Full Professor, Tel Aviv University, 1972-1998

  • Particle Physics Professor emeritus, Tel Aviv University, 1998-Present

  • Teaching and research Full Professor, Bar Ilan University, 1991-2013

  • Teaching and research Full Professor emeritus, Bar Ilan University, 2013-Present

  • Theoretical Physics Visiting Professor, University of Geneva, 1971-1972

  • Theoretical Physics and Mathematical Physics Full Professor, University of Denver, 1969-1971

  • Theoretical Physics and Mathematical physics Associate Professor, University of Denver, 1966-1969

  • Visiting Associate Professor, Tel Aviv University, 1967-1968

  • Theoretical Physics Research Associate, University of Geneva, 1964-1966

  • Theoretical Physics and Mathematics Staff Member, International Business Machines Corp., 1957-1965

  • Consultant, Pickard and Burns, Inc. Needham, Mass.,1952-1954


Frequent Visits, long and short term:


  • University of Texas at Austin, Ilya Prigogine Center for Statistical Mechanics and Complex Systems

  • University of Geneva, Department of Theoretical Physics, CERN Geneva

  • ETH, Honggerberg, Zurich

  • University of Connecticut, Storrs, CT

  • IHES, Bures-sur-Yvette, Paris

Awards and Prizes

  • Sigma Pi Sigma, Tau Beta Pi, Sigma Xi, Samuel F.B. Morse Medal 1952

  • Summa cum laude, NYU, 1952

  • National Science Foundation Fellowship 52-53

  • Shell Oil Fellow 1956-1957

  • Three dedicated issues Foundations of Physics in honor of 65 birthday, 1996: Foundations of Physics 26, No. 12, 1575-1739, (1996); 27, No. 1, 1-134 (1997); 27 No. 2, 135-332 (1997)

  • Outstanding Referee APS, 2008


Society Membership

  • American Physical Society (Particle Physics)

  • Swiss Physical Society

  • European Physical Society

  • International Association for Mathematical Physics

  • Israel Physical Society

  • Israel Mathematics Union

  • European Mathematical Society

  • International Quantum Structures Association

  • Association of Members of the Institute for Advanced Study (from 1990)

  • International Association for Relativistic Dynamics

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