## 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 45

d3r. This is identical to the classical inertia of an irrotational fluid. It is the Smallest

possible inertia for motion with a given time rate of change of the expectation

– ...

d3r. This is identical to the classical inertia of an irrotational fluid. It is the Smallest

possible inertia for motion with a given time rate of change of the expectation

**value**(**Q**). To take a specific example, consider the quadrupole field (2.11)**Q**= 2*– ...

Page 121

All these studies indicate that the ordered-state properties are very sensitive to

the

degree of rationality » of /. In other words, writing frac (/) = pjq, with p and

All these studies indicate that the ordered-state properties are very sensitive to

the

**value**of /. In general, the critical coupling a0 is an increasing function of the «degree of rationality » of /. In other words, writing frac (/) = pjq, with p and

**q**...Page 130

Thus the CEE predicts that the energy A'aries as |8v| In for a spatially uniform

deviation of v from a magic

that the energy of a quasi-particle be finite ; other

...

Thus the CEE predicts that the energy A'aries as |8v| In for a spatially uniform

deviation of v from a magic

**value**njm. ... is a simple consequence of the conditionthat the energy of a quasi-particle be finite ; other

**values**of**Q**leading to divergent...

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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