Spin-Wave Wave Function for Quantum Spin Models | Zendy

Franjo Franjic | Zendy; Sandro Sorella | Zendy

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Spin-Wave Wave Function for Quantum Spin Models

Author(s) -

Franjo Franjic,

Sandro Sorella

Publication year - 1997

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.97.399

Subject(s) - physics , wave function , spin wave , spin (aerodynamics) , quantum mechanics , function (biology) , consistency (knowledge bases) , quantum , wave function collapse , simple (philosophy) , correlation function (quantum field theory) , antiferromagnetism , ground state , statistical physics , open quantum system , quantum operation , mathematics , evolutionary biology , ferromagnetism , biology , thermodynamics , philosophy , geometry , epistemology , dielectric

We present a new approach to determine an accurate variational wave function for general quantum spin models, completely defined by a consistency requirement with the simple and well-known linear spin-wave expansion. With this wave function, it is also possible to obtain the correct behavior of the long distance correlation functions for the 1D S=1/2 antiferromagnet. In 2D the proposed spin-wave wave function represents an excellent approximation to the exact ground state of the S=1/2 XY model. We obtained accurate values for the correlation functions and discuss their physical relevance

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