3,139 research outputs found
Algebraic Bethe Ansatz for deformed Gaudin model
The Gaudin model based on the sl_2-invariant r-matrix with an extra Jordanian
term depending on the spectral parameters is considered. The appropriate
creation operators defining the Bethe states of the system are constructed
through a recurrence relation. The commutation relations between the generating
function t(\lambda) of the integrals of motion and the creation operators are
calculated and therefore the algebraic Bethe Ansatz is fully implemented. The
energy spectrum as well as the corresponding Bethe equations of the system
coincide with the ones of the sl_2-invariant Gaudin model. As opposed to the
sl_2-invariant case, the operator t(\lambda) and the Gaudin Hamiltonians are
not hermitian. Finally, the inner products and norms of the Bethe states are
studied.Comment: 23 pages; presentation improve
Classical quasi-trigonometric matrices of Cremmer-Gervais type and their quantization
We propose a method of quantization of certain Lie bialgebra structures on
the polynomial Lie algebras related to quasi-trigonometric solutions of the
classical Yang-Baxter equation. The method is based on so-called affinization
of certain seaweed algebras and their quantum analogues.Comment: 9 pages, LaTe
Q-power function over Q-commuting variables and deformed XXX, XXZ chains
We find certain functional identities for the Gauss q-power function of a sum
of q-commuting variables. Then we use these identities to obtain two-parameter
twists of the quantum affine algebra U_q (\hat{sl}_2) and of the Yangian
Y(sl_2). We determine the corresponding deformed trigonometric and rational
quantum R-matrices, which then are used in the computation of deformed XXX and
XXZ Hamiltonians.Comment: LaTeX, 12 page
Compatible Poisson-Lie structures on the loop group of
We define a 1-parameter family of -matrices on the loop algebra of
, defining compatible Poisson structures on the associated loop group,
which degenerate into the rational and trigonometric structures, and study the
Manin triples associated to them.Comment: 5 pages, amstex, no figure
On Some Lie Bialgebra Structures on Polynomial Algebras and their Quantization
We study classical twists of Lie bialgebra structures on the polynomial
current algebra , where is a simple complex
finite-dimensional Lie algebra. We focus on the structures induced by the
so-called quasi-trigonometric solutions of the classical Yang-Baxter equation.
It turns out that quasi-trigonometric -matrices fall into classes labelled
by the vertices of the extended Dynkin diagram of . We give
complete classification of quasi-trigonometric -matrices belonging to
multiplicity free simple roots (which have coefficient 1 in the decomposition
of the maximal root). We quantize solutions corresponding to the first root of
.Comment: 41 pages, LATE
Twists in U(sl(3)) and their quantizations
The solution of the Drinfeld equation corresponding to the full set of
different carrier subalgebras in sl(3) are explicitly constructed. The obtained
Hopf structures are studied. It is demonstrated that the presented twist
deformations can be considered as limits of the corresponding quantum analogues
(q-twists) defined for the q-quantized algebras.Comment: 31 pages, Latex 2e, to be published in Journ. Phys. A: Math. Ge
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