Carl W. Helstrom

Carl W. Helstrom (1925–2013) was one of the earliest pioneers in the field of quantum information theory. He is well known in this field for discovering what is now known as the Helstrom measurement, the quantum measurement with minimum error probability for distinguishing one quantum state from another. He has written a textbook which has been widely read by experts in quantum information theory. He authored several other textbooks on signal detection and estimation theory. Provided by Wikipedia