Quantum Phase Diagram of an Exactly Solved Mixed Spin Ladder
نویسندگان
چکیده
منابع مشابه
Quantum Phase Diagram of an Exactly Solved Mixed Spin Ladder
We investigate the quantum phase diagram of the exactly solved mixed spin-(1 2 , 1) ladder via the thermodynamic Bethe ansatz (TBA). In the absence of a magnetic field the model exhibits three quantum phases associated with su(2), su(4) and su(6) symmetries. In the presence of a strong magnetic field, there is a third and full saturation magnetization plateaux within the strong antiferromagneti...
متن کاملAn Exactly Solvable Model of Generalized Spin Ladder
A detailed study of an S = 1 2 spin ladder model is given. The ladder consists of plaquettes formed by nearest neighbor rungs with all possible SU(2)-invariant interactions. For properly chosen coupling constants, the model is shown to be integrable in the sense that the quantum YangBaxter equation holds and one has an infinite number of conserved quantities. The R-matrix and L-operator associa...
متن کاملExactly Solved Models with Quantum Algebra Symmetry*
We have constructed and solved various one-dimensional quantum mechanical models which have quantum algebra symmetry. Here we summarize this work, and also present new results on graded models, and on the so-called string solutions of the Bethe Ansatz equations for the A (2) 2 model.
متن کاملMagnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
We study the spin-1/2 two-leg Heisenberg ladder with four-spin ring exchanges under a magnetic field. We introduce an exact duality transformation which is an extension of the spin-chirality duality developed previously and yields a new self-dual surface in the parameter space. We then determine the magnetic phase diagram using the numerical approaches of the density-matrix renormalization-grou...
متن کاملAn exactly solved model of biological evolution
We reconsider the Eigen’s quasi-species model for competing self-reproductive macromolecules in populations characterized by a single-peaked fitness landscape. The use of ideas and tools borrowed from polymers theory and statistical mechanics, allows us to exactly solve the model for generic DNA lengths d. The mathematical shape of the quasi-species confined around the master sequence is pertur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Statistical Physics
سال: 2004
ISSN: 0022-4715
DOI: 10.1023/b:joss.0000037225.79748.98