## 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 26

a very pure single crystal with very low doping, so that the superconductivity is

strictly controlled by the Bose condensation of the

fairly straightforward. In the antiferromagnetic ground state, the mean-field

a very pure single crystal with very low doping, so that the superconductivity is

strictly controlled by the Bose condensation of the

**holes**. One piece of physics isfairly straightforward. In the antiferromagnetic ground state, the mean-field

**hole**...Page 94

The precise change of the ground state *Fm near r = 0 is unknown because the

a complicated nonlinear problem in this vicinity. However, it is easy to calculate ...

The precise change of the ground state *Fm near r = 0 is unknown because the

**hole**in the electron density must be determined self-consistently, which leads toa complicated nonlinear problem in this vicinity. However, it is easy to calculate ...

Page 179

The first term represents the kinetic energy of the

to 1 — n in the limit n -> 1. In the limit U -> oo only this term remains. The first

study was made by Nagaoka [27], who showed that the kinetic energy of a

The first term represents the kinetic energy of the

**holes**and is clearly proportionalto 1 — n in the limit n -> 1. In the limit U -> oo only this term remains. The first

study was made by Nagaoka [27], who showed that the kinetic energy of a

**hole**...### What people are saying - Write a review

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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