Carl Henry Eckart was an American physicist, physical oceanographer, geophysicist, and administrator. He co-developed the Wigner–Eckart theorem and is also known for the Eckart conditions in quantum m
Carl Eckart
Arthur Compton, Werner Heisenberg, George S. Monk, Paul Dirac, Carl Eckart, Henry Gale, Robert Mulliken, Friedrich Hund, Frank C. Hoyt. Chicago 1929.
Frank Clark Hoyt was an American physicist, regarded as one of the first theoretical physicists to come from the USA in the period that quantum mechanics was being developed.
Carl Eckart
…Schrödinger equation and the laws of conservation of energy, momentum, and angular momentum. The theorem is particularly useful in spectroscopy. With F. C. Hoyt, Eckart translated Heisenberg's book on the physical principles of quantum mechanics. During the 1934–1935 academic year, Eckart took a sabbatical at…
Frank C. Hoyt in Chicago, 1929
Hoyt amongst contemporaries and collaborators at the Niels Bohr commemoration, Copenhagen, 1963