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Hiding canonicalisation in tensor computer algebra (2022)
Preprint / Working Paper
Price, D., Peeters, K., & Zamaklar, M. (2022). Hiding canonicalisation in tensor computer algebra

Simplification of expressions in computer algebra systems often involves a step known as "canonicalisation", which reduces equivalent expressions to the same form. However, such forms may not be natural from the perspective of a pen-and-paper computa... Read More about Hiding canonicalisation in tensor computer algebra.

Holographic meson decays via worldsheet instantons (2018)
Journal Article
Peeters, K., Matuszewski, M., & Zamaklar, M. (2018). Holographic meson decays via worldsheet instantons. Journal of High Energy Physics, 2018(6), Article 83. https://doi.org/10.1007/jhep06%282018%29083

We study meson decays using instanton methods in two string models. The first model is the old string model in flat space which combines strings and massive particles and the second is the holographic, Sakai-Sugimoto model. Using the old string model... Read More about Holographic meson decays via worldsheet instantons.

Phases of kinky holographic nuclear matter (2016)
Journal Article
Elliot-Ripley, M., Sutcliffe, P., & Zamaklar, M. (2016). Phases of kinky holographic nuclear matter. Journal of High Energy Physics, 2016(10), Article 088. https://doi.org/10.1007/jhep10%282016%29088

Holographic QCD at finite baryon number density and zero temperature is studied within the five-dimensional Sakai-Sugimoto model. We introduce a new approximation that models a smeared crystal of solitonic baryons by assuming spatial homogeneity to o... Read More about Phases of kinky holographic nuclear matter.

Signals of a new phase in N=2 gauge theory with a magnetic field on the three-sphere (2014)
Journal Article
Suphakorn, C., Peeters, K., Vanichchapongjaroen, P., & Zamaklar, M. (2014). Signals of a new phase in N=2 gauge theory with a magnetic field on the three-sphere. Journal of High Energy Physics, 2014(9), Article 58. https://doi.org/10.1007/jhep09%282014%29058

We study the effect of a magnetic field on N = 2 super-Yang-Mills on S 3 at strong coupling using the gauge/gravity correspondence. As in previous work that dealt with the theory in infinite volume, we find that increasing the magnetic field pushes t... Read More about Signals of a new phase in N=2 gauge theory with a magnetic field on the three-sphere.

A chiral magnetic spiral in the holographic Sakai-Sugimoto model (2012)
Journal Article
Ballon Bayona, A., Peeters, K., & Zamaklar, M. (2012). A chiral magnetic spiral in the holographic Sakai-Sugimoto model. Journal of High Energy Physics, 2012(11), Article 164. https://doi.org/10.1007/jhep11%282012%29164

We investigate the effect of a magnetic field on the vacuum of low-temperature QCD at large-N c in the presence of a chiral chemical potential, using the holographic SakaiSugimoto model. Above some critical chemical potential we find an instability,... Read More about A chiral magnetic spiral in the holographic Sakai-Sugimoto model.

A Non-homogeneous ground state of the low-temperature Sakai-Sugimoto model (2011)
Journal Article
Ballon Bayona, C., Peeters, K., & Zamaklar, M. (2011). A Non-homogeneous ground state of the low-temperature Sakai-Sugimoto model. Journal of High Energy Physics, 2011(6), Article 92. https://doi.org/10.1007/jhep06%282011%29092

We study the instability of the low-temperature QCD vacuum at large-N c due to an axial chemical potential, using the holographic Sakai-Sugimoto model. We explicitly construct the ground state of the theory, which corresponds to a translationally non... Read More about A Non-homogeneous ground state of the low-temperature Sakai-Sugimoto model.

Finite-size effects for jet quenching (2010)
Journal Article
Chunlen, S., Peeters, K., & Zamaklar, M. (online). Finite-size effects for jet quenching. Journal of High Energy Physics,

We study corrections to the drag force exerted on a quark moving through a quark-gluon plasma of finite extent, using holographic methods. Interestingly we find that the leading correction is negative, i.e. it reduces the magnitude of the drag force... Read More about Finite-size effects for jet quenching.

Exploring colourful holographic superconductors (2009)
Journal Article
Peeters, K., Powell, J., & Zamaklar, M. (2009). Exploring colourful holographic superconductors. Journal of High Energy Physics, 2009(09), Article 101. https://doi.org/10.1088/1126-6708/2009/09/101

We explore a class of holographic superconductors built using non-abelian condensates on probe branes in conformal and non-conformal backgrounds. These are shown to exhibit behaviour of the specific heat which resembles that of heavy fermion compound... Read More about Exploring colourful holographic superconductors.

Temperature versus acceleration: The Unruh effect for holographic models (2009)
Journal Article
Paredes, A., Peeters, K., & Zamaklar, M. (2009). Temperature versus acceleration: The Unruh effect for holographic models. Journal of High Energy Physics, 2009(04), Article 015. https://doi.org/10.1088/1126-6708/2009/04/015

We analyse the effect of velocity and acceleration on the temperature felt by particles and strings in backgrounds relevant in holographic models. First, we compare accelerated strings and strings at finite temperature. We find that for fixed Unruh t... Read More about Temperature versus acceleration: The Unruh effect for holographic models.

Mesons versus quasi-normal modes: Undercooling and overheating (2008)
Journal Article
Paredes, A., Peeters, K., & Zamaklar, M. (2008). Mesons versus quasi-normal modes: Undercooling and overheating. Journal of High Energy Physics, 2008(05), Article 027. https://doi.org/10.1088/1126-6708/2008/05/027

In holographic models of gauge theories with matter, there generically exists a first order phase transition in which mesons dissociate. We perform a careful analysis of the meson and quasi-particle spectra in the overheated resp. undercooled regimes... Read More about Mesons versus quasi-normal modes: Undercooling and overheating.

The String/gauge theory correspondence in QCD (2007)
Journal Article
Peeters, K., & Zamaklar, M. (2007). The String/gauge theory correspondence in QCD. European Physical Journal - Special Topics, 152(1), 113-138. https://doi.org/10.1140/epjst/e2007-00379-0

Ideas about a duality between gauge fields and strings have been around for many decades. During the last ten years, these ideas have taken a much more concrete mathematical form. String descriptions of the strongly coupled dynamics of semi-realistic... Read More about The String/gauge theory correspondence in QCD.

The Zamolodchikov-Faddeev algebra for AdS(5) x S**5 superstring (2007)
Journal Article
Arutyunov, G., Frolov, S., & Zamaklar, M. (2007). The Zamolodchikov-Faddeev algebra for AdS(5) x S**5 superstring. Journal of High Energy Physics, 2007(04), https://doi.org/10.1088/1126-6708/2007/04/002

We discuss the Zamolodchikov-Faddeev algebra for the superstring sigma-model on AdS(5) x S-5. We find the canonical su(2 vertical bar 2)(2) invariant S-matrix satisfying the standard Yang-Baxter and crossing symmetry equations. Its near-plane-wave ex... Read More about The Zamolodchikov-Faddeev algebra for AdS(5) x S**5 superstring.

The Off-shell Symmetry Algebra of the Light-cone AdS(5) x S**5 Superstring. (2007)
Journal Article
Arutyunov, G., Frolov, S., Plefka, J., & Zamaklar, M. (2007). The Off-shell Symmetry Algebra of the Light-cone AdS(5) x S**5 Superstring. Journal of Physics A: Mathematical and Theoretical, 40(13), https://doi.org/10.1088/1751-8113/40/13/018

We analyse the psu(2, 2|4) supersymmetry algebra of a superstring propagating in the AdS5 × S5 background in the uniform light-cone gauge. We consider the off-shell theory by relaxing the level-matching condition and take the limit of infinite light-... Read More about The Off-shell Symmetry Algebra of the Light-cone AdS(5) x S**5 Superstring..

Holographic melting and related properties of mesons in a quark-gluon plasma (2006)
Journal Article
Peeters, K., Zamaklar, M., & Sonnenschein, J. (2006). Holographic melting and related properties of mesons in a quark-gluon plasma. Physical Review D, Particles and fields, 74(10), https://doi.org/10.1103/physrevd.74.106008

We analyze mesons at finite temperature in a chiral, confining string dual. The temperature dependence of low-spin as well as high-spin meson masses is shown to exhibit a pattern familiar from the lattice. Furthermore, we find the dissociation temper... Read More about Holographic melting and related properties of mesons in a quark-gluon plasma.

The AdS(5) x S**5 superstring in light-cone gauge and its Bethe equations (2006)
Journal Article
Frolov, S., Plefka, J., & Zamaklar, M. (2006). The AdS(5) x S**5 superstring in light-cone gauge and its Bethe equations. Journal of Physics A: Mathematical and General, 39(41), 13037-13082. https://doi.org/10.1088/0305-4470/39/41/s15

We use the uniform light-cone gauge to derive an exact gauge-fixed Lagrangian and light-cone Hamiltonian for the Green–Schwarz superstring in AdS5 × S5. We then quantize the theory perturbatively in the near plane wave limit, and compute the leading... Read More about The AdS(5) x S**5 superstring in light-cone gauge and its Bethe equations.

Splitting strings and chains (2005)
Journal Article
Peeters, K., Plefka, J., & Zamaklar, M. (2005). Splitting strings and chains. Fortschritte der Physik, 53, 640-646