Theoretical physicist known for his work in the path integral formulation of quantum mechanics, theory of quantum electrodynamics, and the physics of superfluidity. Nobel Prize recipient for his contributions to the development of quantum electrodynamics.

Italian theoretical physicist and writer. Distinguished Visiting Research Chair at the Perimeter Institute and core member of the Rotman Institute of Philosophy. Founder of loop quantum gravity theory. Author of the popular science book "Seven Brief Lessons on Physics" which has sold over a million copies worldwide.

British physicist at the University of Oxford. Pioneered the field of quantum computation, formulated a description for a quantum Turing machine, and specified an algorithm for quantum computers. Proposer of using entangled states and Bell's theorem for quantum key distribution. Proponent of the many-worlds interpretation of quantum mechanics.

Computer scientist, physicist, and businessman. Known for his work in computer science, mathematics, and theoretical physics. Fellow of the American Mathematical Society.