Skip to Main Content

Morton Rubin

Morton Rubin
Contact Information


Professor Emeritus


Ph.D. Physics Princeton University 1964
B.S. Physics    MIT  1959

Previous Experience

Dr. Rubin joined the UMBC faculty 1973 after a post-doctoral fellowship at the University of Wisconsin followed by being an assistant professor at the University of Pennsylvania.  Dr. Rubin retired at the end of the 2008-09 academic year.

Professional Interests

Dr. Rubin is a theoretical physicist who has published papers in a number of fields.  In the past ten years his work has been concentrated on quantum optics stimulated by the challenge to our perception at the foundations of modern physics by the introduction of quantum theory. The development of technology is moving closer to limits set by nature rather than by our skills. This means that understanding the foundation of quantum theory is becoming more important. At UMBC theoretical and experimental research aimed at understanding the non-classical behavior of light has illustrated behavior that cannot be reproduced by classical electromagnetic fields and has clarified the nature of the entangled two-photon state produced by parametric down conversion. Interesting practical applications of our research have been to metrology and quantum imaging.  Expanding on this work, theoretical studies of efficient sources of two-photon states using four-wave mixing and slow light have recently been completed. In addition, Recent studies have extended our work to three photon.

The paper of Einstein, Podolsky, and Rosen led Schrodinger to introduce the term entanglement for a superposition of states of subsystems that may be far apart. Entanglement is one of the most fascinating and puzzling aspects of quantum physics. The general characterization of entanglement is a difficult mathematical problem.  A study of this problem has been carried out in collaboration with a colleague in mathematics.

Selected Publications

Nonclassical light generation via a four- level inverted Y-system, Shengwang Du, Jianming Wen, Y. Zhang, M. Xiao, and Morton H. Rubin, Phys. Rev. A 77, 033816 (2008).

Transverse correlations in multiphoton entanglement, Jianming Wen, Morton H. Rubin, and Yanhua Shih, Phys. Rev. A 76, 045802 (2007).
Transverse correlations in triphoton entanglement: Geometrical and physical optics, Jianming Wen, P. Xu, Morton H. Rubin, Yanhua Shih, Phys. Rev. A 76, 023828 (2007).

Spontaneous parametric down-conversion in a three-level system,, Jianming Wen, Shengwang Du , and Morton H. Rubin, Phys. Rev. A 76, 013825 (2007).
Transverse Effects in Paired Photon Generation via an EIT Medium II: Beyond Perturbation Theory, Jianming Wen and Morton H.Rubin, Phys. Rev. A 74, 023809 (2006).

Resolution of quantum and classical ghost imaging, Milena D’Angelo, Alejandra Vlencia, Morton H. Rubin, and Yanhua Shih, Phys. Rev. A 72, 13810 (2005).
Effects of mismatched transmissions on two-mode squeezing and EPR correlations with a slow light medium, Sulakshana Thanvanthri, Jianming Wen, and Morton H. Rubin, Phys. Rev. A 72, 023822 (2005).

Convexity and the separability problem in quantum mechanical density matrices, A. O. Pittenger and M. H. Rubin, Linear Algebra and its Applications 346, 47 (2002).

Complete separability and Fourier representations of n-qubit states, A. O. Pittenger and M. H. Rubin, Phys. Rev. A62, 042306 (2000).

Two-photon Entanglement From Spontaneous Parametric Down Conversion From Temporally Distinct Pulses, T. E. Keller, M. H. Rubin, Y. Shih, Phys. Lett. A, 244, 507 (1998).

Transverse Correlations in optical spontaneous parametric down-conversion, M. H. Rubin, Phys. Rev. A54, 5349 (1996).

Einstein-Podolsky-Rosen State for Space-Time Variables in a Two Photon Interference Experiment, M. H. Rubin, Y. H. Shih, and A. V. Sergienko, Phys. Rev. A47, 1288 (1993).