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48 results for quantum Racah coefficients

New method for calculating colored HOMFLY-PT polynomials for links with different symmetric representations.

problem Calculating colored HOMFLY-PT polynomials for links with arbitrary symmetric representations.
method Using quantum Racah coefficients (6j-symbols) of Uq(sl2)U_q(sl_2) to simplify the evaluation.
result Multi-colored link polynomials H[r1],[r2]H_{[r_1],[r_2]} for a specific link L7a3 are successfully evaluated.

We describe the inclusive Racah matrices for the first non-(anti)symmetric rectangular representation R=[2,2] for quantum groups U_q(sl_N). Most of them have sizes 2, 3, and 4 and are fully described by the eigenvalue hypothesis. Of two 6x6 matrices, one is also described in this way, but the other one corresponds to t…

2016-05-10abs ↗pdf ↗

Study reveals hidden structure behind Racah matrices for twisted knots.

problem Understanding non-associativity in representation products of twisted knots.
method Analysis of quantum R-matrices and their eigenvalues to decompose Racah matrices.
result Discovery of pentad structure (Tˉ,Sˉ,S,E,B)(\bar T, \bar S, S, {\cal E}, {\cal B}) associated with universal R-matrix.

New findings on knot polynomials for specific representations.

problem Understanding HOMFLY polynomials for twist knots and their representations.
method Differential expansion of HOMFLY polynomials for twist knots and analysis of Racah matrices.
result Deviation of a specific coefficient from skew dimension in R=[333] representation.

New formula simplifies evolution of twist knots and calculates Racah matrices for rectangular representations.

problem Simplifying evolution of twist knots and calculating Racah matrices for rectangular representations.
method Developed a universal formula for triangular evolution matrix B{\cal B} applicable to rectangular representations R=[rs]R=[r^s]. Used skew characters and Macdonald polynomials.
result Explicit knowledge of twist-family evolution leads to a nearly explicit answer for Racah matrix Sˉ\bar S in arbitrary rectangular representation RR.

This paper is a next step in the project of systematic description of colored knot polynomials started in arXiv:1506.00339. In this paper, we managed to explicitly find the inclusive\textit{inclusive} Racah matrices, i.e. the whole set of mixing matrices in channels R3QR^{\otimes 3}\longrightarrow Q with all possible QQ, for …

2016-11-11abs ↗pdf ↗

Factorization of DE coefficients is violated in antiparallel triple pretzels, but described elegantly.

problem Understanding the origins of factorization in double braids and its extension to antiparallel triple pretzels.
method Defect-preserving deformation from trefoil to antiparallel triple pretzels, analysis of DE coefficients.
result Factorization of DE coefficients is violated but described by an elegant formula for symmetric representations.

Quantum cluster algebras for surfaces with coefficients defined using skein theory.

problem Defining quantum cluster algebras for surfaces with coefficients.
method Introducing a skein algebra and proving it has a quantum cluster structure.
result The skein algebra of a walled surface naturally generalizes quantum cluster algebras of marked surfaces.

Quantum channels' contraction under privacy constraints studied.

problem Understanding the privacy constraints on quantum channel contractions.
method Established upper bounds on contraction coefficients for specific divergences under QLDP constraints.
result Upper bounds and full characterization of contraction coefficients for specific quantum distances.

Restricts quantum representations of mapping class groups to integral coefficients.

problem Integrality of non-semisimple quantum representations of mapping class groups.
method Exhibits explicit bases of states spaces that span Z[ζ]\mathbb{Z}[ζ]-lattices invariant under mapping class groups.
result Restricts quantum representations to integral coefficients from Q(ζ)\mathbb{Q}(ζ) to Z[ζ]\mathbb{Z}[ζ].

New quantum states capture more information, enabling advanced processing tasks.

problem Quantum information processing challenges with limited statistical information.
method Introducing Random-Coefficient Pure States (RCPS) and exploiting their higher-order statistics.
result RCPS provide richer information than density operators, enabling new quantum tasks.

We construct a general procedure to extract the exclusive Racah matrices S and \bar S from the inclusive 3-strand mixing matrices by the evolution method and apply it to the first simple representations R =[1], [2], [3] and [2,2]. The matrices S and \bar S relate respectively the maps (R\otimes R)\otimes \bar R\longrig…

2016-05-16abs ↗pdf ↗

Factorization of the differential expansion coefficients for HOMFLY-PT polynomials of double braids, discovered in arXiv:1606.06015 in the case of rectangular representations RR, is extended to the first non-rectangular representations R=[2,1]R=[2,1] and R=[3,1]R=[3,1]. This increases chances that such factorization will take p…

2016-12-01abs ↗pdf ↗

This work constructs a finite-dimensional projective representation for a quantum Teichmüller model.

problem Quantum Teichmüller theory and its finite-dimensional representation.
method Explicit construction using cyclic quantum dilogarithm and mutations of coefficients.
result Reconstruction of quantum Teichmüller space with explicit intertwiners.

Racah matrices and higher jj-symbols are used in description of braiding properties of conformal blocks and in construction of knot polynomials. However, in complicated cases the logic is actually inverted: they are much better deduced from these applications than from the basic representation theory. Following the re…

2017-01-02abs ↗pdf ↗

Study on quantum sl3\mathfrak{sl}_3 invariant for positive links.

problem Characterizing and understanding the quantum sl3\mathfrak{sl}_3 invariant of positive links.
method Skein theory of sl3\mathfrak{sl}_3-webs, explicit formulae, diagrammatic quantities, obstructions.
result Positive links are fibered if and only if the second coefficient of the polynomial is 1.

Quantum basis coefficients are positive integers for framed local systems on surfaces.

problem Positivity of quantum basis coefficients for framed local systems on surfaces.
method Introduced a graph to solve a combinatorial ordering problem about ideal triangulations and closed curves on surfaces.
result Laurent coefficients of quantum basis elements are positive integers.

Quantum K-theory of quintic 3-fold conjectured with non-polynomial coefficients.

problem Reconstructing quantum K-theory for quintic 3-fold.
method Formulated explicit conjecture for small J-function and its q-difference equation.
result Coefficients of q-difference equations are non-polynomial functions of Gopakumar-Vafa invariants.

This paper is a new step in the project of systematic description of colored knot polynomials started in arXiv:1506.00339. In this paper, we managed to explicitly find the inclusive Racah matrix, i.e. the whole set of mixing matrices in channels R^3->Q with all possible Q, for R=[3,1]. The calculation is made possible …

2016-05-08abs ↗pdf ↗

Efficient algorithms for WRT invariants of torus bundles using algebraic structures.

problem Computing topological invariants of 3-manifolds is generally intractable.
method Embedding skein algebra into symmetric subalgebra at roots of unity for polynomial-time classical computation and using quantum algorithms for exponential space advantage.
result Polynomial-time classical computation and quantum algorithms for WRT invariants of torus bundles.

We study new invariants of elliptic partial differential operators acting on sections of a vector bundle over a closed Riemannian manifold that we call the relativistic heat trace and the quantum heat traces. We obtain some reduction formulas expressing these new invariants in terms of some integral transforms of the u…

2016-11-11abs ↗pdf ↗

New method uses resurgent analysis to determine growth rate of quantum field theory coefficients.

problem Determining the growth rate of quantum field theory coefficients.
method Resurgence analysis on the Stokes line, leading to transseries decomposition and continued across natural boundary.
result Essential exponent of growth has Cardy-like interpretation as effective central charge.

In this paper we present some conditions for the (strong) stabilizability of an n-D Quantum MIMO system P(X). It contains two parts. The first part is to introduce the n-D Quantum MIMO systems where the coefficients vary in the algebra of Q-meromorphic functions. Then we introduce some conditions for the stabilizabilit…

2009-07-11abs ↗pdf ↗

Lossy compression of statistical data using quantum annealing.

problem Efficiently compressing statistical floating-point data.
method Representation learning with binary variables, classical optimization of basis vectors, quantum annealing for coefficients, bias correction.
result Quantum annealing shows promising results with 3.5x better compression than neural-network autoencoders.

Quantum cluster algebra constructed from web skein relations on surfaces.

problem Quantization of cluster structures on moduli spaces of SL3 local systems.
method Constructing a quantum cluster algebra inside the skew-field of a skein algebra of unpunctured surfaces.
result Laurent expressions of webs in clusters have positive coefficients.

We propose a version of the non-relativistic quantum mechanics in which the pure states of a quantum system are described as sections of a Hilbert (generally infinitely-dimensional) fibre bundle over the space-time. There evolution is governed via (a kind of) a parallel transport in this bundle. Some problems concernin…

1998-03-29abs ↗pdf ↗

A very simple expression is conjectured for arbitrary colored Jones and HOMFLY polynomials of a rich (g+1)(g+1)-parametric family of Pretzel knots and links. The answer for the Jones and HOMFLY polynomials is fully and explicitly expressed through the Racah matrix of U_q(SU_N), and looks related to a modular transformatio…

2014-12-08abs ↗pdf ↗

The Quantum Modularity Conjecture of Zagier predicts the existence of a formal power series with arithmetically interesting coefficients that appears in the asymptotics of the Kashaev invariant at each root of unity. Our goal is to construct a power series from a Neumann-Zagier datum (i.e., an ideal triangulation of th…

2015-11-18abs ↗pdf ↗

Applications of Quantum Tunneling effect have long gone beyond the traditional physical meaning. Initially created by Gamow to explain α-decay of nuclear particles, along the time, quantum tunneling found fertile domain of research in chemistry and recently in biology, where the new discipline of Quantum Biology emerge…

2013-07-25abs ↗pdf ↗

Homological model for quantum representations of mapping class groups.

problem Investigate linearity of mapping class groups using quantum representations.
method Homological action on configuration space with twisted coefficients.
result Identify subrepresentation equivalent to quantum sl2\mathfrak{sl}_2 representation.