منابع مشابه
The fully frustrated XY model with next nearest neighbor interaction
We introduce a fully frustrated XY model with nearest neighbor (nn) and next nearest neighbor (nnn) couplings which can be realized in Josephson junction arrays. We study the phase diagram for 0 ≤ x ≤ 1 (x is the ratio between nnn and nn couplings). When x < 1/ √ 2 an Ising and a BerezinskiiKosterlitz-Thouless transitions are present. Both critical temperatures decrease with increasing x. For x...
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Giancarlo Franzese, 1,2,3,* Vittorio Cataudella, S. E. Korshunov, and Rosario Fazio Istituto Nazionale per la Fisica della Materia (INFM), Unità di Napoli e Catania, Italy Dipartimento di Scienze Fisiche, Universitá ‘‘Federico II,’’ Mostra d’Oltremare, Padiglione 19, 80125 Napoli, Italy Dipartimento di Fisica ‘‘E. Amaldi,’’ Università Roma Tre, via della Vasca Navale 84, 00146 Roma, Italy L. D....
متن کاملRenormalization-group approach to quantum Fisher information in an XY model with staggered Dzyaloshinskii-Moriya interaction
We investigate the quantum Fisher information and quantum phase transitions of an XY spin chain with staggered Dzyaloshinskii-Moriya interaction using the quantum renormalization-group method. The quantum Fisher information, its first-derivatives, and the finite-size scaling behaviors are rigorously calculated respectively. The singularity of the derivatives at the phase transition point as a f...
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We define a new set of excitations in the XY model which we call ‘‘fractional vortices.’’ In the frustrated XY model containing p bonds, we make the ansatz that the ground state configurations can be characterized by pairs of oppositely charged fractional vortices. For a chain of p bonds, the ground state energy and the phase configurations calculated on the basis of this ansatz agree well with...
متن کاملFractional vortices in the XY - model with π - bonds
We define a new set of excitations in the XY-model which we call " fractional vortices ". In the frustrated XY-model containing π-bonds, we make the ansatz that the ground state configurations can be characterized by pairs of oppositely charged fractional vortices. For a chain of π-bonds, the ground state energy and the phase configurations calculated on the basis of this ansatz agree well with...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2019
ISSN: 2470-0045,2470-0053
DOI: 10.1103/physreve.99.062112