Holographic quarkyonic matter

Kovensky, Nicolas; Schmitt, Andreas

doi:10.1007/jhep09(2020)112

Cited by 52 publications

(61 citation statements)

References 72 publications

(166 reference statements)

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“…In recent years, the gauge-gravity duality [2][3][4] has been increasingly applied to dense matter as well, providing a rigorous strong-coupling approach, albeit in theories that differ more or less from Quantum Chromodynamics (QCD), the relevant underlying theory. These studies either focus on a holographic version of quark matter, to be combined with a field-theoretical description of nuclear matter if applied to compact stars [5][6][7][8], or they employ isospin-symmetric nuclear matter for simplicity [9][10][11][12][13][14][15]. In this paper we develop a more realistic approach by including an isospin asymmetry into the holographic description of dense baryonic matter.…”

Section: Motivationmentioning

confidence: 99%

Isospin asymmetry in holographic baryonic matter

Kovensky

Schmitt

2021

SciPost Phys.

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We study baryonic matter with isospin asymmetry, including fully dynamically its interplay with pion condensation. To this end, we employ the holographic Witten-Sakai-Sugimoto model and the so-called homogeneous ansatz for the gauge fields in the bulk to describe baryonic matter. Within the confined geometry and restricting ourselves to the chiral limit, we map out the phase structure in the presence of baryon and isospin chemical potentials, showing that for sufficiently large chemical potentials condensed pions and isospin-asymmetric baryonic matter coexist. We also present first results of the same approach in the deconfined geometry and demonstrate that this case, albeit technically more involved, is better suited for comparisons with and predictions for real-world QCD. Our study lays the ground for future improved holographic studies aiming towards a realistic description of charge neutral, beta-equilibrated matter in compact stars, and also for more refined comparisons with lattice studies at nonzero isospin chemical potential.

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Section: Motivationmentioning

confidence: 99%

Isospin asymmetry in holographic baryonic matter

Kovensky

Schmitt

2021

SciPost Phys.

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“…Although there have been other models of quarkyonic matter which have been successful in describing several neutron star properties [29,30], the model of [1] is one of the few available dynamical models of quarkyonic matter. For other examples of dynamical model for quarkyonic matter, see [31,32]. More specifically, the shell width of quarkyonic matter and its variation arise dynamically in the model of [1].…”

Section: Discussionmentioning

confidence: 99%

Finite-temperature quarkyonic matter with an excluded volume model

Sen

Warrington

2021

Nuclear Physics A

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Inspired by the excluded volume model for isospin symmetric quarkyonic matter [1], we construct an 'excluded volume' model for a charge neutral quarkyonic phase whose hadronic sector contains only neutrons. We refer to this model as quarkyonic neutron matter. We compute the equation of state for this model and solve the Tolman-Oppenhermer-Volkoff equations to obtain mass and radius relations relevant for neutron stars. The most straightforward extension of the model for symmetric quarkyonic matter [1] to quarkyonic neutron matter does not satisfy the mass radius constraints from neutron star measurements. However, we show that by incorporating appropriate nuclear interactions in the excluded volume model one can produce mass-radius relations that lie within the constraints obtained from gravitational waves of binary neutron star mergers and maximum mass measurements of neutron stars.

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“…AdS/CFT, or holography, is a framework that has become increasingly popular to understand complicated phenomena involving strongly coupled degrees of freedom in large-N gauge theories [1]. Its application to systems with a finite charge density range from neutron stars [2][3][4][5][6][7][8][9][10][11][12][13] to quantum Hall systems [14][15][16][17][18][19][20][21][22][23][24], superfluids and superconductors [25][26][27][28][29][30][31][32], strange metals [33][34][35][36][37][38][39][40][41], and more general quantum critical systems [42][43][44][45][46][47]. Many of these setups exhibit a rich phenomenology that resembles that of real-world (finite-N...…”

Section: Jhep05(2021)149mentioning

confidence: 99%

Quantum information probes of charge fractionalization in large-N gauge theories

DiNunno

Jokela

Pedraza

et al. 2021

J. High Energ. Phys.

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We study in detail various information theoretic quantities with the intent of distinguishing between different charged sectors in fractionalized states of large-N gauge theories. For concreteness, we focus on a simple holographic (2 + 1)-dimensional strongly coupled electron fluid whose charged states organize themselves into fractionalized and coherent patterns at sufficiently low temperatures. However, we expect that our results are quite generic and applicable to a wide range of systems, including non-holographic. The probes we consider include the entanglement entropy, mutual information, entanglement of purification and the butterfly velocity. The latter turns out to be particularly useful, given the universal connection between momentum and charge diffusion in the vicinity of a black hole horizon. The RT surfaces used to compute the above quantities, though, are largely insensitive to the electric flux in the bulk. To address this deficiency, we propose a generalized entanglement functional that is motivated through the Iyer-Wald formalism, applied to a gravity theory coupled to a U(1) gauge field. We argue that this functional gives rise to a coarse grained measure of entanglement in the boundary theory which is obtained by tracing over (part) of the fractionalized and cohesive charge degrees of freedom. Based on the above, we construct a candidate for an entropic c-function that accounts for the existence of bulk charges. We explore some of its general properties and their significance, and discuss how it can be used to efficiently account for charged degrees of freedom across different energy scales.

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Holographic quarkyonic matter

Cited by 52 publications

References 72 publications

Isospin asymmetry in holographic baryonic matter

Isospin asymmetry in holographic baryonic matter

Finite-temperature quarkyonic matter with an excluded volume model

Quantum information probes of charge fractionalization in large-N gauge theories

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