A bstract We study the dynamics of a first-order phase transition in strongly coupled gauge theory at non-zero temperature and chemical potential, computing nucleation rates wall speeds from first principles. The is four-dimensional superconformal SU( N ) × Klebanov-Witten theory, which low temperatures displays an instability to forming scalar condensates that higgses theory. computation made possible by utilizing gravity dual, type IIB string on asymptotically AdS 5 T 1 , spacetimes....

We use a top-down holographic model for strongly interacting quark matter to study the properties of neutron stars. When corresponding equation state (EOS) is matched with state-of-the-art results dense nuclear matter, we consistently observe first-order phase transition at densities between 2 and 7 times saturation density. Solving Tolman-Oppenheimer-Volkov equations resulting hybrid EOSs, find maximal stellar masses in excess two solar masses, albeit somewhat smaller than those obtained...

It has been conjectured that the speed of sound in holographic models with UV fixed points an upper bound set by value quantity conformal field theory. If true, this would stringent constraints for presence strongly coupled quark matter cores physical neutron stars, as existence two-solar-mass stars appears to demand a very stiff equation state. In article, we present family counterexamples conjecture, consisting theories at finite density. The consider include $\mathcal{N}=4$ super...

Ab initio methods using weakly interacting nucleons give a good description of condensed nuclear matter up to densities comparable the saturation density. At higher palpable strong interactions between overlapping become important; we propose that will continuously switch over follow holographic model in this region. In order implement this, construct hybrid equations state (EoSs) where various models are used for low density matter, and V-QCD is non-perturbative high as well quark matter....

In this review article, we describe the role of holography in deciphering physics dense QCD matter, relevant for description compact stars and their binary mergers. We strengths limitations holographic duality describing strongly interacting matter at large baryon density, walk reader through most important results derived using approach so far, highlight a number outstanding open problems field. Finally, discuss how foresee contributing to compact-star coming years.

The transport properties of dense QCD matter play a crucial role in the physics neutron stars and their mergers, but are notoriously difficult to study with traditional quantum field theory tools. Specializing case unpaired quark beta equilibrium, we approach problem through machinery holography, particular V-QCD D3-D7 models, derive results for electrical thermal conductivities shear bulk viscosities. In addition compare viscosity ratio speed sound find that it violates so-called Buchel...

A bstract We consider the holographic candidate for entanglement of purification E P , given by minimal cross sectional area an wedge W . The is generally very complicated quantity to obtain in field theories, thus establish conjectured relationship one needs test if and share common features. In this paper entangling regions we are slabs, concentric spheres, creases theories Minkowski space. latter two can be mapped defined on corresponding entangled caps orange slices, respectively. work...

The detection of gravitational waves from a neutron star merger has opened up the possibility detecting presence or creation deconfined quark matter using wave signal. To investigate this possibility, we construct family equations state at nonzero density and temperature by combining state-of-the-art nuclear with holographic for strongly interacting matter. emerging picture consistently points toward strong first order deconfinement transition, temperature-dependent critical latent heat that...

We study various entanglement measures in a one-parameter family of three-dimensional, strongly coupled Yang-Mills-Chern-Simons field theories by means their dual supergravity descriptions. A generic theory this possesses mass gap but does not have linear quark-antiquark potential. For the two limiting values parameter, flow either to fixed point or confining vacuum infrared. show that are unable discriminate from non-confining ones with gap. This lends support on idea phase transition...

Using a holographic derivation of quantum effective action for scalar operator at strong coupling, we compute quasiequilibrium parameters relevant the gravitational wave signal from first-order phase transition in simple dual model. We discuss how vary with number degrees freedom field theory. Our model can produce an observable LISA if critical temperature is around TeV, parameter region where theory has approximate conformal symmetry.

We discuss the computation of quantum effective action strongly interacting field theories using holographic duality, and its use to determine quasi-equilibrium parameters first order phase transitions relevant for gravitational wave production. A particularly simple model is introduced, containing only metric a free massive scalar field. Despite simplicity, contains rich diagram, including at non-zero temperature, due various multi-trace deformations. obtain leading terms in from...

A bstract According to common lore, Equations of State field theories with gravity duals tend be soft, speeds sound either below or around the conformal value $$ {\upupsilon}_s=1/\sqrt{3} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>υ</mml:mi> <mml:mi>s</mml:mi> </mml:msub> <mml:mo>=</mml:mo> <mml:mn>1</mml:mn> <mml:mo>/</mml:mo> <mml:msqrt> <mml:mn>3</mml:mn> </mml:msqrt> </mml:math> . This has important consequences in particular for physics compact stars,...

Motivated by the possible presence of deconfined quark matter in neutron stars and their mergers important role transport phenomena these systems, we perform first-ever systematic study different viscosities conductivities dense using gauge/gravity duality. Utilizing V-QCD model, arrive at results that are qualitative disagreement with predictions perturbation theory, which highlights differing properties system weak strong coupling calls for caution use perturbative neutron-star applications.

We investigate first order phase transitions in a holographic setting of five-dimensional Einstein gravity coupled to scalar field, constructing diagrams the dual field theory at finite temperature. scan over two-dimensional parameter space simple bottom-up model and map out important quantities for transition: region where take place; latent heat, transition strength $\alpha$, stiffness. find that $\alpha$ is generically range 0.1 0.3, strongly correlated with stiffness (the square sound...

We analyze families of hybrid equations state cold QCD matter, which combine input from gauge-gravity duality and various ab initio methods for nuclear matter at low density, predict that all neutron stars are fully hadronic without quark cores. focus on constraints recent measurements by the NICER telescope radius mass millisecond pulsar PSR $\mathrm{J}0740+6620$. These results found to be consistent with our approach: they set only mild favor most natural models relatively stiff density....

Modern hydrodynamic simulations of core-collapse supernovae and neutron-star mergers require knowledge not only the equilibrium properties strongly interacting matter, but also system's response to perturbations, encoded in various transport coefficients. Using perturbative holographic tools, we derive here an improved weak-coupling a new strong-coupling result for most important coefficient unpaired quark its bulk viscosity. These results are combined simple analytic pocket formula quantity...

At high enough charge density, the homogeneous state of D3-D7' model is unstable to fluctuations at nonzero momentum. We investigate end point this instability, finding a spatially modulated ground state, which and spin density wave. analyze phase structure as function chemical potential magnetic field find transition from be first order, with second-order critical zero field.

We use the holographic V-QCD models to analyse physics of dense QCD and neutron stars. Accommodating lattice results for thermodynamics enables us make generic predictions Equation State (EoS) quark matter phase in cold regime. demonstrate that resulting pressure matches well with a family neutron-star-matter EoSs interpolate between state-of-the-art theoretical low high density QCD. After implementing astrophysical constraints, i.e., largest known star mass recent LIGO/Virgo tidal...

A minimal requirement for any strongly coupled gauge field theory to have a classical dual bulk gravity description is that one should in principle be able recover the full geometry as encoded on asymptotics of spacetime. Even this cannot fulfilled with arbitrary precision simply due fact boundary data inherently noisy. We present statistical approach reconstruction from entanglement entropy measurements, which handles presence noise natural way. Our therefore opens up novel gateway holography.

We study gravitational wave memory effect in the FRW cosmological model with matter and constant. Since background is curved, radiation develops a tail part arriving after main signal that travels along past light cone of observer. First we discuss first order sourced by binary system, find only gives negligible memory, accord previous results. Then nonlinear coming from induced propagating over distances. In novel term missed studies effect. Furthermore, show has slowly accumulates passed...