In the past, I have studied the physics of electron-atom interactions in He and Li, and later the redistribution of resonant laser light within dense vapors. I developed a laser laboratory at Amherst College, where I continued the study of laser-atom interactions.
In 1981, I was a visiting scientist at the Ecole Normale Supérieure in Paris, where I researched parity violating effects in atoms. During that period, I also began research into the area of quantum erasers, which is an intriguing exploration of the puzzles of quantum measurement. This led to experimental research into the paradox of "delayed-choice" in quantum mechanics while visiting the Max Planck Institute for Quantum Optics. My work in the experimental foundations of quantum physics has continued in a variety of ways until this date.
Through the years, I have also developed a deep interest in research and writing about the interaction of science and humanities as well as science and the world's spiritual traditions. This has led to research on the uses of contemplative pedagogy in higher education.