Arponen, J

name

• Arponen, J

Authored works

• A holomorphic representation approach to the regularization of model field theories in coupled cluster form
• An approximation for the positron green's function and the positron annihilation probability in electron gas
• Coupled clusters : perturbation theory made non-perturbative
• Electron liquid in collective description : 3, Positron annihilation
• Electron-positron correlations
• Electron-positron interactions
• Exact high-density results for the positron correlation energy and annihilation rate in a homogenous electron gas
• Independent-cluster methods as mappings of quantum theory into classical mechanics
• Independent-cluster parametrizations of wave functions in model field theories : 1, Introduction to their holomorphic representations
• Positron annihilation and the positron-electron many-body system
• Statistinen fysiikka
• Sum rules and hard-core problem in the dynamical and static expS theory for quantum bose liquids
• The holomorphic representation of a set of supercoherent canonical coordinates for a quantum oscillator with x[sup 2K] anharmonicity
• The Lipkin pseudospin model in the variational expS formalism
• The method of stationary cluster amplitudes and the phase transition in the Lipkin pseudospin model
• The momentum distribution of the positron in an electron gas
• Variational exp S methods
• Variational principles and linked-cluster expS expansions for static and dynamic many-body problems

Works contributed to

• 11th International Workshop on Condensed Matter Theories, Oulu, July 27 - August 1, 1987 : program and abstracts
• Charge density and positron annihilation in defects of aluminium
• Electron liquid in collective description : 3, Positron annihilation
• Extended coupled-cluster method : 1, Generalized coherent bosonization as a mapping of quantum theory into classical Hamiltonian mechanics
• On the Bargmann space approach to the extended coupled cluster method for simple anharmonic systems

Works about Arponen, J