# Robert O'Connell

#### BOYD Professor Emeritus

B.Sc., 1953 - National University of Ireland, Galway

Ph.D., 1962 - University of Notre Dame

D.Sc., 1975 - National University of Ireland

Louisiana State University

Department of Physics & Astronomy

225 Nicholson Hall, Tower Dr.

Baton Rouge, LA 70803-4001

225-578-6848-Office

oconnell@phys.lsu.edu **Personal Home Page**

### Research Interests

#### Quantum Optics, Atomic Physics, Stochastic Physics, General Relativity

For many years and with a variety of collaborators, especially G. W. Ford (University of Michigan), I have been studying dissipative and fluctuation phenomena in quantum mechanics and related applications. Our emphasis has been on fundamental questions in quantum theory with special emphasis on decoherence, entanglement and superposition (Schrödinger cat) states particularly pertaining to the areas of quantum measurement, information, teleportation, cryptography and computation, as well as the quantum-classical interface. More recently, we have been studying fundamental questions relating to measurement of quantum probability distribution functions with potential applications to a wide variety of nano and quantum information systems, with emphasis on how their entanglement properties vary with time. In addition, we are using the generalized quantum Langevin equation to explore recent topical questions in non-equilibrium statistical mechanics (particularly claims that the fundamental laws of thermodynamics may be violated in the quantum regime), and in particular, we have presented an exact solution to the radiation reaction problem.

Motivated by the discovery of a unique double pulsar system, I have recently returned to a serious study of an area in which I worked for many years viz. spin effects in gravitational theory and its relevance for hidden momentum.

### Current and Select Publications

- R.F.O'Connell, "Electron interaction with the spin angular momentum of the electromagnetic field", J.Phys. A 50, 085306(2017).

- R. F. O’Connell, "General Relativistic Two-Body Problem: Theory and Experiment and the Role of Hidden Momentum", in D. Puetzfeld et al. (eds.), Equations of Motion in Relativistic Gravity, Fundamental Theories of Physics 179, Springer, 2015.

- R. F. O’Connell, "Position and Spin Operators, Wigner Rotation and the Origin of Hidden Momentum Forces," EPJ Web of Conferences 78, 02002 (2014).

- G. W. Ford and R. F. O'Connell, "Pair of oscillators interacting with a common heat bath," Phys. Rev. A 89, 054101 (2014).

- G. W. Ford and R. F. O’Connell, "Lorentz transformation of blackbody radiation," Phys. Rev. E 88, 044101 (2013).

- R. F. O'Connell, "Radiation Reaction: General approach and applications, especially
to electrodynamics,"
*Contemporary Physics***53(4)**, 301-313 (2012).

- F. Intravaia, R. Behunin, P. Milonni, G. W. Ford and R. F. O'Connell, "Consistency
of the exact theory of Radiative Reaction with the Optical Theorem,"
*Phys. Rev. A***8**4, 035801 (2011).

- R. F. O'Connell, "Gravito-Magnetism in one-body and two-body systems: Theory and Experiment," in "Atom Optics and Space Physics," Proc. of Course CLXVIII of the International School of Physics "Enrico Fermi", Varenna, Italy, 2007, ed. E. Arimondo, W. Ertmer and W. Schleich (IOS, Amsterdam, 2009).

- R. F. O'Connell, "The Wigner Distribution," in "Compendium of Quantum Mechanics," edited by D. Greenberger, B. Falkenburg, K. Hentschel and F. Weinert, (Springer, New York, 2009).

- G. W. Ford and R. F. O'Connell, "A Quantum Violation of the Second Law,"
*Phys. Rev. Lett.***96**, 020402 (2006).