Fermionic Squeezed State for the O(4) Model as a Schematic Model in a Many-Fermion System | Zendy

H. Akaike | Zendy; Y. Tsue | Zendy; Seiya Nishiyama | Zendy

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Fermionic Squeezed State for the O(4) Model as a Schematic Model in a Many-Fermion System

Author(s) -

H. Akaike,

Y. Tsue,

Seiya Nishiyama

Publication year - 2004

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.112.583

Subject(s) - physics , pairing , fermion , context (archaeology) , quantum mechanics , ground state , schematic , hartree–fock method , state (computer science) , squeezed coherent state , coherent states , quantum , statistical physics , quantum electrodynamics , theoretical physics , paleontology , superconductivity , algorithm , electronic engineering , computer science , engineering , biology

It is shown that a variational approach with fermionic squeezed states tomany-fermion systems such as pairing model is one of useful methods beyond theusual Hartree-Fock-Bogoliubov approximation. A pairing-type quasi-spin squeezedstate is constructed and adopted as a trial state in the variational method. Byusing this state, quantum fluctuations are taken into account. In pairingmodel, dynamical and static approaches are discussed in the context ofcomparing with the Hartree-Fock-Bogoliubov approximation about ground stateenergy. As a possible extension to the O(4) model, prospective squeezed statesare investigated and the usefulness is discussed.Comment: 26 pages, 6 figures, Using PTPTeX styl

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