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 curvature and gravity

Chernicoff, Mariano; Giribet, Gastón; Grandi, Nicolás; Lavia, Edmundo F.; Oliva, Julio

doi:10.1103/physrevd.98.104023

Cited by 15 publications

(12 citation statements)

References 81 publications

(78 reference statements)

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“…In the context of a top-down anisotropic deformation of a strongly coupled N = 4 Super-Yang-Mills (SYM) plasma driven by a nontrivial profile for a bulk axion field [128,129], the corresponding anisotropic drag forces [130][131][132], Langevin diffusion coefficients [133][134][135], and shear viscosities [136], have been already computed but a detailed holographic study of anisotropic momentum transport driven by an external magnetic field has not yet been done.…”

Section: Shear Viscosity 49mentioning

confidence: 99%

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Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields

et al. 2016

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We present a holographic perspective on momentum transport in strongly coupled, anisotropic non-Abelian plasmas in the presence of strong magnetic fields. We compute the anisotropic heavy quark drag forces and Langevin diffusion coefficients and also the anisotropic shear viscosities for two different holographic models, namely, a top-down deformation of strongly coupled N = 4Super-Yang-Mills (SYM) theory triggered by an external Abelian magnetic field, and a bottomup Einstein-Maxwell-dilaton (EMD) model which is able to provide a quantitative description of lattice QCD thermodynamics with (2 + 1)-flavors at both zero and nonzero magnetic fields. We find that, in general, energy loss and momentum diffusion through strongly coupled anisotropic plasmas are enhanced by a magnetic field being larger in transverse directions than in the direction parallel to the magnetic field. Moreover, the anisotropic shear viscosity coefficient is smaller in the direction of the magnetic field than in the plane perpendicular to the field, which indicates that strongly coupled anisotropic plasmas become closer to the perfect fluid limit along the magnetic field. We also present, in the context of the EMD model, holographic predictions for the entropy density and the crossover critical temperature in a wider region of the (T, B) phase diagram thathas not yet been covered by lattice simulations. Our results for the transport coefficients in the phenomenologically realistic magnetic EMD model could be readily used as inputs in numerical codes for magnetohydrodynamics.

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Section: Shear Viscosity 49mentioning

confidence: 99%

“…In anisotropic environments, the approach used to obtain the drag forces was discussed in Refs. [130][131][132], while the Langevin coefficients were studied in Refs. [133][134][135].…”

Section: Appendix A: Revision Of Heavy Quark Momentum Transportmentioning

confidence: 99%

Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields

et al. 2016

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“…Subsequently, this idea has been generalized to various cases, such as chemical potential [18][19][20], finite coupling [21], non-commutativity plasma [22] and AdS/QCD models [23][24][25]. Other studies in this direction can be found in [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Drag force on heavy quarks from holographic QCD *

2019

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We study the drag force of a relativistic heavy quark using a holographic QCD model with conformal invariance broken by a background dilaton. We analyze the effects of chemical potential and confining scale on this quantity, respectively. It is shown that the drag force in this model is larger than that of N = 4 supersymmetric Yang-Mills (SYM) plasma. In particular, the inclusion of the chemical potential and confining scale both enhance the drag force, in agreement with earlier findings. Also, we discuss how chemical potential and confining scale influence the diffusion coefficient.

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“…For this quantity in some AdS/QCD models, see [23][24][25]. Other important results can be found, for example, in [26][27][28][29][30][31][32][33]. Now we would like to give such analysis under the influence of a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Drag force in strongly coupled ${ \mathcal N }=4$ supersymmetric Yang–Mills plasma in a magnetic field

Zhang¹,

Ma²,

Hou³

2018

J. Phys. G: Nucl. Part. Phys.

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Applying AdS/CFT correspondence, we study the effect of a constant magnetic field B on the drag force associated with a heavy quark moving through a strongly-coupled N = 4 supersymmetric Yang-Mills (SYM) plasma. The quark is considered moving transverse and parallel to B, respectively. It is shown that for transverse case, the drag force is linearly dependent on B in all regions. While for parallel case, the drag force increases monotonously with increasing B and also reveals a linear behavior in the regions of strong B. In addition, we find that B has important effect for transverse case than parallel. PACS numbers: 12.38.Mh, 11.25.Tq, 11.15.Tk √ λB 6π v. However, the metric therein is valid only near the horizon, so the discussions are restricted to the infrared (IR) regime. In this paper, we would like to extend it to the case of all regimes by considering a general magnetic field. Specially, we want to know how an arbitrary magnetic field affects the drag force.The paper is organized as follows. In the next section, we briefly review the asymptotic AdS 5 holographic Einstein-Maxwell model and introduce the background metric in the presence of a magnetic field. In section 3, we show numerical procedure and some numerical solutions. In section 4, we investigate the drag force for the quark moving transverse and parallel to the magnetic field, in turn. The last part is devoted to conclusion and discussion.

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Q curvature and gravity

Cited by 15 publications

References 81 publications

Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields

Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields

Drag force on heavy quarks from holographic QCD *

Drag force in strongly coupled ${ \mathcal N }=4$ supersymmetric Yang–Mills plasma in a magnetic field

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