Aephraim M. SteinbergView profile
Professor
Aephraim M. Steinberg is a University Professor of Physics at the University of Toronto, holding one of the highest academic honors at the institution since 2021. He is a leading researcher in quantum physics, specializing in quantum measurement, ultracold atoms, quantum optics, and quantum information processing. Steinberg serves as co-Director of the CIFAR Quantum Information Science program and is an affiliate member of the Perimeter Institute for Theoretical Physics. Steinberg received his B.S. from Yale University in 1988 and his Ph.D. from UC Berkeley in 1994. His research program uses both nonclassical two-photon interference and laser-cooled atoms to investigate fundamental quantum phenomena. His work spans quantum information & computation, decoherence and the quantum-classical boundary, tunneling times, weak measurement and retrodiction in quantum mechanics, and the control and characterization of novel quantum states. Notably, his group has made groundbreaking contributions to understanding quantum tunneling times, weak measurements, and quantum metrology beyond classical limits. His recent publications reveal a strong trend toward quantum metrology and precision measurement, with significant work on multiparameter estimation, weak-value amplification, and sub-Rayleigh imaging techniques. His research increasingly bridges fundamental quantum foundations with practical quantum technologies, particularly in quantum information processing and quantum cryptography. His group's work on quantum fully homomorphic encryption represents cutting-edge applications of quantum information theory. Fellow of the Royal Society of Canada (2016) Physics World Breakthrough of the Year (2011) E.W.R. Steacie Memorial Fellowship (2007) CAP Herzberg Medal (2006) RSC Rutherford Medal (2006) APS Doctoral Thesis Prize (1996) Steinberg has mentored numerous graduate students who have gone on to successful careers in academia and industry, including positions at MIT, Xanadu, and NIST. His research is generously supported by major funding agencies including NSERC, CIFAR, FQXi, and the Fetzer Franklin Foundation. His group maintains strong international collaborations with institutions worldwide, reflecting his prominence in the quantum physics community. Based in labs MP 054/056 at the University of Toronto, Steinberg's Quantum Optics Group operates cutting-edge experimental setups for studying Bose-Einstein condensates, quantum measurement, and quantum information processing. His group maintains strong connections with the Center for Quantum Information and Quantum Control (CQIQC) and the Institute for Optical Sciences at U of T, forming a vibrant quantum research ecosystem in Toronto.











