Holographic approach to quark–gluon plasma in heavy ion collisions

Aref’eva, I. Ya.

doi:10.3367/ufne.0184.201406a.0569

Cited by 80 publications

(25 citation statements)

References 275 publications

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“…Over the past two decades, interest has arisen in the theory of radiation in space-time dimensions other than four. This was due to the emergence of theories with large extra dimensions [1], the development of a holographic approach to the description of quark-gluon plasma [2,3], the beginning of gravitational-wave astronomy and other reasons. The case of three-dimensional space-time became relevant in connection with the development of field-theoretical models in condensed matter physics, such as quantum Hall effect, high-temperature superconductivity, and graphene.…”

Section: Introductionmentioning

confidence: 99%

“…Motivation for studying radiation in various dimensions comes also from holography, namely, the holographic modeling of quark-gluon plasma [2]. From the gravity side it involves consideration of gravitational radiation in collisions of ultrarelativistic particles or approximating them shock gravitational waves on the background of anti-de Sitter [3].…”

Section: Introductionmentioning

confidence: 99%

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Synchrotron radiation in odd dimensions

Gal'Tsov

Khlopunov

2020

Phys. Rev. D

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In odd space-time dimensions, the retarded solution of the massless wave equation has support not only on the light cone, but also inside it. At the same time, a free massless field should propagate at the speed of light. The apparent contradiction of these two features is resolved by the fact that the emitted part of the field in the wave zone depends on the history of motion up to the retarded moment of proper time. It is shown that in the case of circular motion with ultrarelativistic velocity, the main contribution to the radiation amplitude is made by a small interval of proper time preceding the retarded time, and thus the tail term is effectively localized. We obtain a tentative formula for scalar synchrotron radiation in D dimensions: P = g 2 (ω 0 γ 2 / √ 3) D−2 , which is explicitly verified in D = 3, 4, 5.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synchrotron radiation in odd dimensions

Gal'Tsov

Khlopunov

2020

Phys. Rev. D

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“…The QGP goes through several stages of evolution. It is believed that the QGP is created after a very short time after the collision τ therm ≈ few 0.1 fm/c and the holographic approach, in particular, is aimed to describe this and a short nearest period of evolution [2,3]. There are indications that in this time the QGP is anisotropic.…”

Section: Introductionmentioning

confidence: 99%

Analytic black branes in Lifshitz-like backgrounds and thermalization

Aref’eva

Golubtsova

Gourgoulhon

2016

J. High Energ. Phys.

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Using black brane solutions in 5d Lifshitz-like backgrounds with arbitrary dynamical exponent ν, we construct the Vaidya geometry, asymptoting to the Lifshitz-like spacetime, which represents a thin shell infalling at the speed of light. We apply the new Lifshitz-Vaidya background to study the thermalization process of the quark-gluon plasma via the thin shell approach previously successfully used in several backgrounds. We find that the thermalization depends on the chosen direction because of the spatial anisotropy. The plasma thermalizes thus faster in the transversal direction than in the longitudinal one. To probe the system described by the Lifshitz-like backgrounds, we also calculate the holographic entanglement entropy for the subsystems delineated along both transversal and longitudinal directions. We show that the entropy has some universality in the behavior for both subsystems. At the same time, we find that certain characteristics strongly depend on the critical exponent ν.

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“…Real-time formalism of quantum field theory at finite temperature is more suitable to study the quark gluon plasma [7].…”

Section: Introductionmentioning

confidence: 99%