Mean-field theory for Heisenberg zigzag ladder: Ground state energy and spontaneous symmetry breaking

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dc.creatorMkhitaryan, V. V.
dc.creatorSedrakyan, T. A.
dc.date2006-11-03
dc.date.accessioned2026-07-07T10:40:52Z
dc.date.available2026-07-07T10:40:52Z
dc.descriptionThe spin-1/2 zig-zag Heisenberg ladder (J_1 - J_2 model) is considered. A new representation for the model is found and a saddle point approximation over the spin-liquid order parameter < \vec σ_{n-1}(\vec σ_{n}\times \vec σ_{n+1}) > is performed. Corresponding effective action is derived and analytically analyzed. We observe the presence of phase transitions at values J_2/J_1=0.231 and J_2/J_1=1/2.
dc.description12 pages, 6 figures. Contribution to the Annales Henri Poincare volume dedicated to the memory of Daniel Arnaudon
dc.identifierhttps://arxiv.org/abs/cond-mat/0611082
dc.identifierhttp://arxiv.org/abs/cond-mat/0611082
dc.identifierAnnalesHenriPoincare7:1579-1590,2006
dc.identifierdoi:10.1007/s00023-006-0294-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181457
dc.subjectStrongly Correlated Electrons
dc.subjectHigh Energy Physics - Theory
dc.titleMean-field theory for Heisenberg zigzag ladder: Ground state energy and spontaneous symmetry breaking
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