## Supernova Mechanisms (Bethe, pp. 801-867) WITH Coherent States: Theory and Some Applications (Zhang, pp. 867-929) in Reviews of Modern Physics, Vol. 62, Number 4, October 1990

New York: American Physical Society, 1990. 1st Edition. FIRST EDITION IN ORIGINAL WRAPS OF HANS BETHE ON SUPERNOVA MECHANISMS, THE PHYSICS OF THE COLLAPSE, NEUTRINO EMISSION, THE OUTWARD SHOCK & SN 1987A.

Also included is a classic review article on generalized coherent states by Zhang, et al. Hans Albrecht Bethe was a German-American physicist who made important contributions to astrophysics, quantum electrodynamics and solid-state physics and won the 1967 Nobel Prize in Physics for his work on the theory of stellar nucleosynthesis, specifically, "for his contributions to the theory of nuclear reactions, especially his discoveries concerning the energy production in stars” (Nobel Prize Committee).

The 1990 Bethe paper offered here is an important and “thorough discussion of the physics of core collapse, neutrino trapping and neutron star convection” (Wheeler, Observations and Theory of Supernovae, 9). As Bethe states, “Supernovae of Type II occur at the end of the evolution of massive stars. The phenomenon begins when the iron core of the star exceeds a Chandrasekhar mass. The collapse of that core under gravity is well understood and takes a fraction of a second. To understand the phenomenon, a detailed knowledge of the equation of state at the relevant densities and temperatures is required. After collapse, the shock wave moves outward, but probably does not succeed in expelling the mass of the star. The most likely mechanism to do so is the absorption of neutrinos from the core by the material at medium distances. Observations and theory connected with SN 1987A are discussed, as are the conditions just before collapse and the emission of neutrinos by the collapsed core (Bethe, 1990, 801).

In the Zhang paper, “a general algorithm for constructing coherent states of dynamical groups for a given quantum physical system is presented. The result is that, for a given dynamical group, the coherent states are isomorphic to a coset space of group geometrical space. Thus the topological and algebraic structure of the coherent states as well as the associated dynamical system can be extensively discussed. In addition, a quantum-mechanical phase-space representation is constructed via the coherent-state theory. Several useful methods for employing the coherent states to study the physical phenomena of quantum-dynamic systems, such as the path integral, variational principle, classical limit, and thermodynamic limit of quantum mechanics, are described” (Zhang, 1990, 867). Item #997

CONDITION & DETAILS: Lancaster: American Physical Society. Volume 62, Number 4, October, 1990. Original printed wraps. (10.5 x 8 inches; 263 x 200mm). This is not an ex-institutional copy. Single ownership signature of Boris Leaf, the Japanese-American physicist with achievements including research in statistical mechanics, thermodynamics and quantum mechanics. Very slight wear at the edges of the wraps; slight soiling. Near fine condition inside and out.

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Price:
$175.00
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