Hydrodynamic modes in a magnetized chiral plasma with vorticity

Rybalka, D. O.; Gorbar, É. V.; Shovkovy, Igor

doi:10.1103/physrevd.99.016017

Cited by 25 publications

(28 citation statements)

References 99 publications

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“…This type of collision integral was recently used in Refs. [60][61][62]. The above collision integral has to be taken with care as it assumes that impurity scattering relaxes both regular and axial charge densities [63].…”

Section: Collisions With Single Effective Relaxation Timementioning

confidence: 99%

Magnetotransport in multi-Weyl semimetals: a kinetic theory approach

Dantas

Peña-Benítez

Roy

et al. 2018

J. High Energ. Phys.

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We study the longitudinal magnetotransport in three-dimensional multi-Weyl semimetals, constituted by a pair of (anti)-monopole of arbitrary integer charge (n), with n = 1, 2 and 3 in a crystalline environment. For any n > 1, even though the distribution of the underlying Berry curvature is anisotropic, the corresponding intrinsic component of the longitudinal magnetoconductivity (LMC), bearing the signature of the chiral anomaly, is insensitive to the direction of the external magnetic field (B) and increases as B 2 , at least when it is sufficiently weak (the semi-classical regime). In addition, the LMC scales as n 3 with the monopole charge. We demonstrate these outcomes for two distinct scenarios, namely when inter-particle collisions in the Weyl medium are effectively described by (a) a single and (b) two (corresponding to inter-and intra-valley) scattering times. While in the former situation the contribution to LMC from chiral anomaly is inseparable from the non-anomalous ones, these two contributions are characterized by different time scales in the later construction. Specifically for sufficiently large inter-valley scattering time the LMC is dominated by the anomalous contribution, arising from the chiral anomaly. The predicted scaling of LMC and the signature of chiral anomaly can be observed in recently proposed candidate materials, accommodating multi-Weyl semimetals in various solid state compounds.

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Section: Collisions With Single Effective Relaxation Timementioning

confidence: 99%

Magnetotransport in multi-Weyl semimetals: a kinetic theory approach

Dantas

Peña-Benítez

Roy

et al. 2018

J. High Energ. Phys.

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“…In contrast to the original predictions, however, recently we found that the CMW should be a diffusive mode in the weakly coupled plasma in the long-wavelength limit [30]. The novel aspect of our analysis was the rigorous treatment of dynamical electromagnetism in chiral plasmas.…”

Section: Introductionmentioning

confidence: 75%

“…In order to give a self-contained presentation, let us start by briefly reviewing the key details of the CMW dynamics for a chiral plasma obtained in Ref. [30]. Since the local vorticity plays no vital role in the propagation of the CMW, we will consider only the case of a non-rotating plasma.…”

Section: Hydrodynamic Analysis Of Collective Modesmentioning

confidence: 99%

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The overdamped chiral magnetic wave

Shovkovy¹,

Rybalka²,

Gorbar³

2019

Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)

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About eight years ago it was predicted theoretically that a charged chiral plasma could support the propagation of the so-called chiral magnetic waves, which are driven by the anomalous chiral magnetic and chiral separation effects. This prompted intensive experimental efforts in search of signatures of such waves in relativistic heavy-ion collisions. In fact, several experiments have already reported a tentative detection of the predicted signal, albeit with a significant background contribution. Here, we critically reanalyze the theoretical foundations for the existence of the chiral magnetic waves. We find that the commonly used background-field approximation is not sufficient for treating the waves in hot chiral plasmas in the long-wavelength limit. Indeed, the back-reaction from dynamically induced electromagnetic fields turns the chiral magnetic wave into a diffusive mode. While the situation is slightly better in the strongly-coupled near-critical regime of quark-gluon plasma created in heavy-ion collisions, the chiral magnetic wave is still strongly overdamped due to the effects of electrical conductivity and charge diffusion. XIII Quark Confinement and the Hadron

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“…See[54] for a related work 13. For a general system with U (1) triangle anomalies some expressions have been found for these coefficients in[20].…”

mentioning

confidence: 99%

Quantum chaos, pole-skipping and hydrodynamics in a holographic system with chiral anomaly

Abbasi

Tabatabaei

2020

J. High Energ. Phys.

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It is well-known that chiral anomaly can be macroscopically detected through energy and charge transport, due to chiral magnetic effect. On the other hand, the chaotic modes in a many body system are only associated with energy conservation. So, this suggests that, perhaps, one can detect the microscopic anomalies through the quantum chaos in such systems. To holographically investigate this idea, we consider a magnetized brane in AdS space time with a Chern-Simons coupling in the bulk. By studying the shock wave geometry in this background, we first compute the corresponding butterfly velocities, in the presence of an external magnetic field B, in µ T and B T 2 limit. We find that the butterfly propagation in the direction of B has not the same velocity as the one of opposite direction; the difference is turned out to be as ∆v B = (log(4) − 1)∆v sound with ∆v sound being the difference between velocity of the two sound modes propagating in the system. Such special form of splitting confirms the idea that chiral anomaly can be macroscopically manifested via quantum chaos. We then show that the pole-skipping points of energy density Green's function in the boundary theory coincide precisely with the chaos points. This might be regarded as hydrodynamic origin of quantum chaos in an anomalous system. In addition, by studying the near horizon dynamics of a scalar field on the above background, we find the spectrum of pole-skipping points associated with the two-point function of dual boundary operator. We show that the sum of wavenumbers corresponding to the pole-skipping points at a specific Matsubara frequency follows from a closed formula. Interestingly, we find that the same information about splitting of butterfly velocities is encoded in the pole-skipping points with the lowest Matsubara frequency, independent of scaling dimension of dual boundary operator. * abbasi@lzu.edu.cn † smjty25@gmail.com 4 See also [36] for the first study of pole-skipping at finite coupling. 5 Let us denote that by using symmetries, we only work with a subset of δg µν 's. 6 v is the time coordinate in the Eddington-Finkelstein coordinates.

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Hydrodynamic modes in a magnetized chiral plasma with vorticity

Cited by 25 publications

References 99 publications

Magnetotransport in multi-Weyl semimetals: a kinetic theory approach

Magnetotransport in multi-Weyl semimetals: a kinetic theory approach

The overdamped chiral magnetic wave

Quantum chaos, pole-skipping and hydrodynamics in a holographic system with chiral anomaly

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