## 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 291

Note that, purely for convenience, we have included the inertial (mass) term in

the

included in R, or not, as we wish. Equation (2.3) is, of course, by no means the

most ...

Note that, purely for convenience, we have included the inertial (mass) term in

the

**equation of motion**in R; any linear term in dV/Bq can, of course, also beincluded in R, or not, as we wish. Equation (2.3) is, of course, by no means the

most ...

Page 292

That the Hamiltonian (2.4), with the condition (2.5), does indeed lead to the

classical Langevin equation, (2.1), can be verified by a direct calculation in which

one writes down the

; ...

That the Hamiltonian (2.4), with the condition (2.5), does indeed lead to the

classical Langevin equation, (2.1), can be verified by a direct calculation in which

one writes down the

**equations of motion**for q and the xa and eliminates the latter; ...

Page 298

Now suppose we wish to modify the Hamiltonian in such a way as to produce

ohmic dissipation with a friction constant tj, so that the modified classical

Now suppose we wish to modify the Hamiltonian in such a way as to produce

ohmic dissipation with a friction constant tj, so that the modified classical

**equation****of motion**(at T = 0) reads where V(q) is the same function as appears in (2.25).### 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