Jordan, Pascual

Jordan, Pascual, "Ueber eine neue Begriindung der Quantenmechanik." ZP 40 (1927) 809838. 

Joliot-Curie Frederick, 722 Joliot-Curie Irene, 722 Jones Steven E., 328 Jordan Pascual, 3,11-12 Josza Richard, 51... 

Joliot-Curie Frederic 618 Joliot-Curie Irene 618 Jones Steven E. 269 Jordan Pascual 3,11,12, 35 Jprgensen Poul 378, 426, 532, 536, 560, 565, 645, 674, 678 Josza Richard 47 Joubert Daniel 613 Jozsa Richard 3 Jungen Christian 510... 

Proc.RSL A113 (1927) 621641 Pascual Jordan, "Ueber eine neue Begriindung der Quantenmechanik," ZP 40 (1927) 809838 Werner Heisenberg, "Ueber den anschaulichen Inhalt der quantentheoretischen Kinematik und Mechanik," ZP 43 (1927) 172198. Bohr first discussed the principle of complementarity at a conference in Como in 1927 see Niels Bohr, "The Quantum Postulate and the Recent Development of Atomic Theory," Nature 121 (1928) 580590. 

In Keith Hannabuss An Introduction to Quantum Theory Letter to Pascual Jordan 28 July 1926 (p. 235)... 

The exact foundation of modem quantum mechanics was laid in 1925-1926, by Wemer Heisenberg, Max Bom and Pascual Jordan, and by the Austrian physicist Erwin Schrodinger. The latter s formulation in terms of wave functions has, in particular, proved well suited for the description of atoms, molecules and solids, and their interaction with light. Thus, the Schrodinger equation supplies the basis for our understanding of the chemical bond and for the description of, say, atomic and molecular spectra. 

A paper by 24-year-old Werner Heisenberg turned out to be a breakthrough in quantum theory. He wrote in a letter My whole effort is to destroy without a trace the idea of orbits. Max Born recognized matrix algebra in Heisenberg s formulation (who, himself, had not yet realized it), and in the same year, a more solid formulation of the new mechanics ( matrix mechanics ) was proposed by Werner Heisenberg, Max Born, and Pascual Jordan. ... 

Let us recall that the essence of UGA goes all the way back to 1935 when Pascual Jordan (of Nazi disrepute) used U(oo) generators to represent one- and two-body Hamiltonians [14]. In the late sixties, it was revived by Moshinsky in the context of the nuclear many-body problem [15]. Here, however, four-column irreducible representations (irreps) are required in view of the presence of both the spin and isospin. Consequently, the resulting rather complex formalism has never been implemented in actual applications for nuclei, as far as we know (see, however, [16]). 

At about the same time, Werner Heisenberg introduced another approach to quantum theory, which was subsequently amended in conjunction with Max Born and Pascual Jordan and matrix mechanics was developed. 

German physicist. Heisenberg was one of the founders of quantum mechanics. In 1925, along with Max BORN and Pascual Jordan, he formulated matrix mechanics. In 1926 he studied the spectrum of molecular hydrogen and predicted the existence of ortho- and para-hydrogen from the splitting of the spectral lines. His most famous contribution is the HEISENBERG UNCERTAINTY PRINCIPLE, put forward in 1927. 

Shortly after de Broglie s theory appeared, new mathematical treatments, known collectively as quantum mechanics, were introduced to describe the behaviour of electrons in atoms. Erwin Schrodinger (1887-1961) developed wave mechanics, and Werner Heisenberg (1901-1976) used a different approach called matrix mechanics. Heisenberg s treatment led to the uncertainty principle, which stated that it is impossible simultaneously to determine precisely both the position and the velocity of the electron. Other workers in the field were Max Born (1882-1970), Pascual Jordan and Paul Dirac (1902-1984). Although the approaches of Schrodinger and Heisenberg seemed very different, it was ultimately realised that there is a fundamental unity between them. 

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