## 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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Results 1-3 of 27

Page 2

Independently J. Hubbard [15, 16] had begun to think about magnetism and

his sequence of long papers giving approximate solutions to the many- body

problem ...

Independently J. Hubbard [15, 16] had begun to think about magnetism and

**metal**-insulator transitions using a generalized version of the same model, andhis sequence of long papers giving approximate solutions to the many- body

problem ...

Page 3

model, the Mott phenomenon and the

interaction problem, and particularly the « Mott insulator » limit, requires methods

which deal with the strong coupling from the start. The most promising method for

...

model, the Mott phenomenon and the

**metal**-insulator transition. The strong-interaction problem, and particularly the « Mott insulator » limit, requires methods

which deal with the strong coupling from the start. The most promising method for

...

Page 172

The term almost localized Fermi liquid was introduced to describe systems in

which the charge (or density) fluctuations are strongly suppressed, but the spin

fluctuations have a low-energy scale. This can arise if one examines a

close to ...

The term almost localized Fermi liquid was introduced to describe systems in

which the charge (or density) fluctuations are strongly suppressed, but the spin

fluctuations have a low-energy scale. This can arise if one examines a

**metal**close to ...

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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