Browsing Theoretical Physics by Issue Date
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New Modular Hopf Algebras related to rational $k$ $\widehat {sl(2)}$
(1993)We show that the Hopf link invariants for an appropriate set of finite dimensional representations of $ U_q SL(2)$ are identical, up to overall normalisation, to the modular S matrix of Kac and Wakimoto for rational $k$ ... 
Hidden classical symmetry in quantum spaces at roots of unity : From qsphere to fuzzy sphere
(2000)We study relations between different kinds of noncommutative spheres which have appeared in the context of ADS/CFT correspondences recently, emphasizing the connections between spaces that have manifest quantum group ... 
Stringy Spacetime Uncertainty as an Alternative to Inflation
(2001)In this paper we point out that the spacetime uncertainty relation proposed for string theory has strong cosmological implications that can solve the flatness problem and the horizon problem without the need of inflation. ... 
Finite N effects on the collapse of fuzzy spheres
(20060523) 
Quantum MHV diagrams
(World Scientific, 200609)Over the past two years, the use of onshell techniques has deepened our understanding of the Smatrix of gauge theories and led to the calculation of many new scattering amplitudes. In these notes we review a particular ... 
From Matrix Models and quantum fields to Hurwitz space and the absolute Galois group
(2010)We show that correlators of the hermitian oneMatrix model with a general potential can be mapped to the counting of certain triples of permutations and hence to counting of holomorphic maps from worldsheet to sphere ... 
A surprise in the amplitude/Wilson loop duality
(20100429)One of the many remarkable features of MHV scattering amplitudes is their conjectured equality to lightlike polygon Wilson loops, which apparently holds at all orders in perturbation theory as well as nonperturbatively. ... 
Analytic twoloop form factors in N=4 SYM
(201205) 
Multiple membranes in Mtheory
(20130116)We review developments in the theory of multiple, parallel membranes in Mtheory. After discussing the inherent difficulties with constructing a maximally supersymmetric lagrangian with the appropriate field content and ... 
Deconstructing (2,0) proposals
(20130712)We examine the relationships between three proposals for the sixdimensional (2,0) theory: the discrete lightcone quantization (DLCQ) of Aharony et al. [Adv. Theor. Math. Phys. 1, 148 (1998); Adv. Theor. Math. Phys. 2, ... 
Charge transport by holographic Fermi surfaces
(American Physical Society, 201308)We compute the contribution to the conductivity from holographic Fermi surfaces obtained from probe fermions in an AdS charged black hole. This requires calculating a certain part of the oneloop correction to a vector ... 
Microscopic unitary description of tidal excitations in highenergy stringbrane collisions
(20131114)The eikonal operator was originally introduced to describe the effect of tidal excitations on highergenus elastic string amplitudes at high energy. In this paper we provide a precise interpretation for this operator ... 
Constraints on chiral operators in N=2 SCFTs
(Springer Verlag, 2014)Abstract: We study certain higherspin chiral operators in (formula presented)(formula presented) superconformal field theories (SCFTs). In Lagrangian theories, or in theories related to Lagrangian theories by generalized ... 
Counting Tensor Model Observables and Branched Covers of the 2Sphere
(2014)Lattice gauge theories of permutation groups with a simple topological action (henceforth permutationTFTs) have recently found several applications in the combinatorics of quantum field theories (QFTs). They have been ... 
Constraints on chiral operators in N=2 SCFTs
(2014)© 2014, The Author(s).Abstract: We study certain higherspin chiral operators in (formula presented)(formula presented) superconformal field theories (SCFTs). In Lagrangian theories, or in theories related to Lagrangian ... 
ABJM amplitudes and the positive orthogonal Grassmannian
(Springer, 20140225)A remarkable connection between perturbative scattering amplitudes of four dimensional planar SYM, and the stratification of the positive Grassmannian, was revealed in the seminal work of ArkaniHamed et al. Similar extension ... 
VisibleRange Sensitization of Er(3+)Based Infrared Emission from Perfluorinated 2Acylphenoxide Complexes.
(201404)Five new fully fluorinated acylphenoxide ligands, which are aromatic analogues of βdiketonates, provide visible photosensitization of the Er(3+4)I13/2 → (4)I15/2 emission at ∼1540 nm (of interest for telecommunications) ...