## Frontiera E Confini Della Fisica Di Molte ParticelleR. A. Broglia, John Robert Schrieffer, Società italiana di fisica Subjects at the forefront of many-particle research, like high-temperature superconductivity, the quantum Hall effect, heavy fermions, tunneling of quantal systems with many degrees of freedom, Monte Carlo calculations on a lattice etc., were presented. The meeting was well timed as it coincided with a very active period of research in the study of superconductivity and thus provided an excellent opportunity to assess some of the major developments that have taken place in the last years. |

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Page 224

The probability that an excited nucleus will decay by emitting a giant-dipole-

oscilla-

energy. This picture is idealized in that the states are depicted as distinct, sharp

levels.

The probability that an excited nucleus will decay by emitting a giant-dipole-

oscilla-

**tion**photon is proportional to the relative density of the R states at thatenergy. This picture is idealized in that the states are depicted as distinct, sharp

levels.

Page 232

Illustration of the steps used in calculation of the vibrational strength func'

The compound nuclear states |x') (left) at spin I = 0 are excited to their vibrational

partner states I" |x|) at spin I = 1. These states are embedded in a dense ...

Illustration of the steps used in calculation of the vibrational strength func'

**tion**.The compound nuclear states |x') (left) at spin I = 0 are excited to their vibrational

partner states I" |x|) at spin I = 1. These states are embedded in a dense ...

Page 371

Fermions can hop and interact in the shaded squares. The dashed line indicates

a possible local move generating a new configuraruns from 0 to /? along the y-

axis. This time direction

...

Fermions can hop and interact in the shaded squares. The dashed line indicates

a possible local move generating a new configuraruns from 0 to /? along the y-

axis. This time direction

**tion**. NUMERICAL SIMULATIONS OF MANY-ELECTRON...

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### Contents

insula | 1 |

EVB theory such as it is | 14 |

Formal theories of EVB and highT0 superconductivity | 20 |

Copyright | |

21 other sections not shown

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### Common terms and phrases

amplitude angular momentum approximation band barrier behavior calculated charge classical configuration correlation Coulomb coupling cross-section defined deformation degrees of freedom density described dipole discussed dynamics edited effect eigenstates electron equation of motion excitation energy exciton expectation value experimental factor Fermi energy Fermi liquid Fermi surface fermion finite fluctuations gauge given Green's function Gutzwiller Hamiltonian Hartree heavy-ion hole Hubbard model inertia interaction Landau lattice Laughlin Lett limit linear magnetic field mass matrix element mean-field Monte Carlo neutrons nuclear nucleon nucleus obtained orbital oscillator P. W. ANDERSON pairing parameter particle path integral phase Phys physics potential problem quadrupole quantity quantum quasi-particle R. A. BROGLIA relativistic renormalized resonance rotational frequency sect shown in fig simulation single-particle spin spinon superconductivity symmetry temperature term theory tion tonian transition tunnelling variable vector wave function yrast zero