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Ambitwistor strings at null infinity and (subleading) soft limits (2015)
Journal Article
Geyer, Y., Lipstein, A. E., & Mason, L. (2015). Ambitwistor strings at null infinity and (subleading) soft limits. Classical and Quantum Gravity, 32(5), Article 055003. https://doi.org/10.1088/0264-9381/32/5/055003

The relationship between BMS symmetries at null infinity and Weinberg's soft theorems for gravitons and photons together with their subleading extensions are developed using ambitwistor string theory. Ambitwistor space is the phase space of complex n... Read More about Ambitwistor strings at null infinity and (subleading) soft limits.

Tρσ(G) theories and their Hilbert series (2015)
Journal Article
Cremonesi, S., Hanany, A., Mekareeya, N., & Zaffaroni, A. (2015). Tρσ(G) theories and their Hilbert series. Journal of High Energy Physics, 2015(01), Article 150. https://doi.org/10.1007/jhep01%282015%29150

We give an explicit formula for the Higgs and Coulomb branch Hilbert series for the class of 3d N=4N=4 superconformal gauge theories Tρσ(G) corresponding to a set of D3 branes ending on NS5 and D5-branes, with or without O3 planes. Here G is a classi... Read More about Tρσ(G) theories and their Hilbert series.

Aloof baby Skyrmions (2015)
Journal Article
Salmi, P., & Sutcliffe, P. (2015). Aloof baby Skyrmions. Journal of Physics A: Mathematical and Theoretical, 48(3), Article 035401. https://doi.org/10.1088/1751-8113/48/3/035401

We show that a suitable choice for the potential term in the two-dimensional baby Skyrme model yields solitons that have a short-range repulsion and a long-range attraction. The solitons are therefore aloof, in the sense that static multi-soliton bou... Read More about Aloof baby Skyrmions.

BPS Skyrmions as neutron stars (2015)
Journal Article
Adam, C., Naya, C., Sanchez-Guillen, J., Vazquez, R., & Wereszczynski, A. (2015). BPS Skyrmions as neutron stars. Physics Letters B, 742, 136-142. https://doi.org/10.1016/j.physletb.2015.01.027

The BPS Skyrme model has been demonstrated already to provide a physically intriguing and quantitatively reliable description of nuclear matter. Indeed, the model has both the symmetries and the energy–momentum tensor of a perfect fluid, and thus rep... Read More about BPS Skyrmions as neutron stars.

Delta-function interactions for the bosonic and spinning strings and the generation of Abelian gauge theory (2015)
Journal Article
Edwards, J., & Mansfield, P. (2015). Delta-function interactions for the bosonic and spinning strings and the generation of Abelian gauge theory. Journal of High Energy Physics, 2015(1), Article 127. https://doi.org/10.1007/jhep01%282015%29127

We construct contact interactions for bosonic and spinning strings. In the tensionless limit of the spinning string this reproduces the super-Wilson loop that couples spinor matter to Abelian gauge theory. Adding boundary terms that quantise the moti... Read More about Delta-function interactions for the bosonic and spinning strings and the generation of Abelian gauge theory.

Ramification estimate for Fontaine-Laffaille Galois modules (2015)
Journal Article
Abrashkin, V. (2015). Ramification estimate for Fontaine-Laffaille Galois modules. Journal of Algebra, 427, 319-328. https://doi.org/10.1016/j.jalgebra.2014.11.029

Suppose K is unramified over Qp and View the MathML source. Let H be a torsion ΓK-equivariant subquotient of crystalline Qp[ΓK]-module with HT weights from [0,p−2]. We give a new proof of Fontaine's conjecture about the triviality of action of some r... Read More about Ramification estimate for Fontaine-Laffaille Galois modules.

Infinite Chiral Symmetry in Four Dimensions (2015)
Journal Article
Beem, C., Lemos, M., Liendo, P., Peelaers, W., Rastelli, L., & van Rees, B. C. (2015). Infinite Chiral Symmetry in Four Dimensions. Communications in Mathematical Physics, 336(3), 1359-1433. https://doi.org/10.1007/s00220-014-2272-x

We describe a new correspondence between four-dimensional conformal field theories with extended supersymmetry and two-dimensional chiral algebras. The meromorphic correlators of the chiral algebra compute correlators in a protected sector of the fou... Read More about Infinite Chiral Symmetry in Four Dimensions.

General relativisitic, nonstrandard model for the dark sector of the Universe (2015)
Journal Article
Stichel, P., & Zakrzewski, W. (2015). General relativisitic, nonstrandard model for the dark sector of the Universe. The European Physical Journal C, 75(1), Article 9. https://doi.org/10.1140/epjc/s10052-014-3218-3

We present a general relativistic version of the self-gravitating fluid model for the dark sector of the Universe (darkon fluid) introduced in Stichel and Zakrzewski (Phys Rev D 80:083513, 2009) and extended and reviewed in Stichel and Zakrzewski (En... Read More about General relativisitic, nonstrandard model for the dark sector of the Universe.

Mostow's lattices and cone metrics on the sphere (2015)
Journal Article
Boadi, R. K., & Parker, J. R. (2015). Mostow's lattices and cone metrics on the sphere. Advances in Geometry, 15(1), 27-53. https://doi.org/10.1515/advgeom-2014-0022

In his seminal paper of 1980, Mostow constructed a family of lattices in PU(2, 1), the holomorphic isometry group of complex hyperbolic 2-space. In this paper, we use a description of these lattices given by Thurston in terms of cone metrics on the s... Read More about Mostow's lattices and cone metrics on the sphere.

Local integrands for the five-point amplitude in planar N=4 SYM up to five loops (2015)
Journal Article
Ambrosio, R. G., Eden, B., Goddard, T., Heslop, P., & Taylor, C. (2015). Local integrands for the five-point amplitude in planar N=4 SYM up to five loops. Journal of High Energy Physics, 2015(1), Article 116. https://doi.org/10.1007/jhep01%282015%29116

Integrands for colour ordered scattering amplitudes in planar N=4 SYM are dual to those of correlation functions of the energy-momentum multiplet of the theory. The construction can relate amplitudes with different numbers of legs. By graph theory me... Read More about Local integrands for the five-point amplitude in planar N=4 SYM up to five loops.

Quantum critical transport and the hall angle in holographic models (2015)
Journal Article
Blake, M., & Donos, A. (2015). Quantum critical transport and the hall angle in holographic models. Physical Review Letters, 114(2), Article 021601. https://doi.org/10.1103/physrevlett.114.021601

We study the Hall conductivity in holographic models where translational invariance is broken by a lattice. We show that generic holographic theories will display a different temperature dependence in the Hall angle as to the dc conductivity. Our res... Read More about Quantum critical transport and the hall angle in holographic models.

The thermoelectric properties of inhomogeneous holographic lattices (2015)
Journal Article
Donos, A., & Gauntlett, J. (2015). The thermoelectric properties of inhomogeneous holographic lattices. Journal of High Energy Physics, 2015(1), https://doi.org/10.1007/jhep01%282015%29035

We consider inhomogeneous, periodic, holographic lattices of D = 4 Einstein-Maxwell theory. We show that the DC thermoelectric conductivity matrix can be expressed analytically in terms of the horizon data of the corresponding black hole solution. We... Read More about The thermoelectric properties of inhomogeneous holographic lattices.

Spectral Analysis of One-Dimensional High-Contrast Elliptic Problems with Periodic Coefficients (2015)
Journal Article
Cherednichenko, K., Cooper, S., & Guenneau, S. (2015). Spectral Analysis of One-Dimensional High-Contrast Elliptic Problems with Periodic Coefficients. Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 13(1), 72-98. https://doi.org/10.1137/130947106

We study the behavior of the spectrum of a family of one-dimensional operators with periodic high-contrast coefficients as the period goes to zero, which may represent, e.g., the elastic or electromagnetic response of a two-component composite medium... Read More about Spectral Analysis of One-Dimensional High-Contrast Elliptic Problems with Periodic Coefficients.

Bayesian history matching of complex infectious disease models using emulation: A tutorial and a case study on HIV in Uganda (2015)
Journal Article
Andrianakis, I., Vernon, I., McCreesh, N., McKinley, T., Oakley, J., Nsubuga, R., …White, R. (2015). Bayesian history matching of complex infectious disease models using emulation: A tutorial and a case study on HIV in Uganda. PLoS Computational Biology, 11(1), Article e1003968. https://doi.org/10.1371/journal.pcbi.1003968

Advances in scientific computing have allowed the development of complex models that are being routinely applied to problems in disease epidemiology, public health and decision making. The utility of these models depends in part on how well they can... Read More about Bayesian history matching of complex infectious disease models using emulation: A tutorial and a case study on HIV in Uganda.

Truncated conformal space approach in d dimensions: A cheap alternative to lattice field theory? (2015)
Journal Article
Hogevorst, M., Rychkov, S., & van Rees, B. (2015). Truncated conformal space approach in d dimensions: A cheap alternative to lattice field theory?. Physical Review D, 91(2), Article 025005. https://doi.org/10.1103/physrevd.91.025005

We show how to perform accurate, nonperturbative and controlled calculations in quantum field theory in d dimensions. We use the truncated conformal space approach, a Hamiltonian method which exploits the conformal structure of the UV fixed point. Th... Read More about Truncated conformal space approach in d dimensions: A cheap alternative to lattice field theory?.

A Bayesian mixed shrinkage prior procedure for spatial–stochastic basis selection and evaluation of gPC expansions: Applications to elliptic SPDEs (2015)
Journal Article
Karagiannis, G., Konomi, B., & Lin, G. (2015). A Bayesian mixed shrinkage prior procedure for spatial–stochastic basis selection and evaluation of gPC expansions: Applications to elliptic SPDEs. Journal of Computational Physics, 284, 528-546. https://doi.org/10.1016/j.jcp.2014.12.034

We propose a new fully Bayesian method to efficiently obtain the spectral representation of a spatial random field, which can conduct spatial–stochastic basis selection and evaluation of generalized Polynomial Chaos (gPC) expansions when the number o... Read More about A Bayesian mixed shrinkage prior procedure for spatial–stochastic basis selection and evaluation of gPC expansions: Applications to elliptic SPDEs.

Quantitative spectral gap for thin groups of hyperbolic isometries (2015)
Journal Article
Magee, M. (2015). Quantitative spectral gap for thin groups of hyperbolic isometries. Journal of the European Mathematical Society, 17(1), 151-187. https://doi.org/10.4171/jems/500

Let ΛΛ be a subgroup of an arithmetic lattice in SO(n+1,1)SO(n+1,1). The quotient Hn+1/ΛHn+1/Λ has a natural family of congruence covers corresponding to ideals in a ring of integers. We establish a super-strong approximation result for Zariski-dense... Read More about Quantitative spectral gap for thin groups of hyperbolic isometries.

Twist spinning of knots and metabolizers of Blanchfield pairings (2015)
Journal Article
Friedl, S., & Orson, P. (2015). Twist spinning of knots and metabolizers of Blanchfield pairings. Annales de la Faculté des sciences de Toulouse (En ligne), 24(5), 1203-1218. https://doi.org/10.5802/afst.1481

In a classic paper Zeeman introduced the $k$-twist spin of a knot $K$ and showed that the exterior of a twist spin fibers over $S^1$. In particular this result shows that the knot $K\#-K$ is doubly slice. In this paper we give a quick proof of Zeeman... Read More about Twist spinning of knots and metabolizers of Blanchfield pairings.