189 citations · 457 across the 23 of their papers we have counts for
23 papers
Near-Light-Cone Nonhydrodynamic Structure from Boosted Hydrodynamics
Navid Abbasi, Jewel Kumar Ghosh, Dirk H. Rischke
Hydrodynamics provides a universal description of many-body systems at long wavelengths. Its long-lived collective excitations, known as hydrodynamic modes, admit long-wavelength e…
Cumulant dynamics in finite-memory diffusion
Navid Abbasi, Xin An, Shanjin Wu
Fluctuations of conserved charges are among the main proposed signatures of the quantum chromodynamics (QCD) critical point, but their interpretation requires a dynamical descripti…
Comparison between Causal and Acausal Diffusion: a Schwinger-Keldysh Effective Field Theory Perspective
Navid Abbasi, Matthias Kaminski, Dirk H. Rischke
In Fick's time-honored theory of diffusion, the system responds instantaneously to external perturbations, resulting in acausal behavior. Maxwell-Cattaneo theory addresses this iss…
Three-point functions from a Schwinger-Keldysh effective action, resummed in derivatives
Navid Abbasi, Dirk H. Rischke
The search for the conjectured QCD critical point in heavy-ion collisions requires to account for far-from equilibrium effects as well as fluctuations, and in particular non-Gaussi…
Pole-skipping as order parameter to probe a quantum critical point
Navid Abbasi, Karl Landsteiner
The holographic system described by Einstein-Maxwell-Chern-Simons dynamics in the bulk of AdS exhibits a chiral magnetic effect and a quantum critical point. Through numerical calc…
Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
Agnieszka Sorensen, Kshitij Agarwal, Kyle W. Brown +133
The nuclear equation of state (EOS) is at the center of numerous theoretical and experimental efforts in nuclear physics. With advances in microscopic theories for nuclear interact…
On the correlation functions in stable first-order relativistic hydrodynamics
Navid Abbasi, Ali Davody, Sara Tahery
First-order relativistic conformal hydrodynamics in a general (hydrodynamic) frame is characterized by a shear viscosity coefficient and two UV-regulator parameters. Within a certa…
Theory of non-linear diffusion with a physical gapped mode
Navid Abbasi, Matthias Kaminski, Omid Tavakol
In a system with one conserved charge the charge diffusion is modified by non-linear self-interactions within an effective field theory (EFT) of diffusive fluctuations. We include…
Characteristic momentum of Hydro+ and a bound on the speed of sound near the QCD critical point
Navid Abbasi, Matthias Kaminski
Near the critical point in the QCD phase diagram, hydrodynamics breaks down at a momentum where the frequency of the fastest hydrodynamic mode becomes comparable with the decay rat…
Long-time tails in the SYK chain from the effective field theory with a large number of derivatives
Navid Abbasi
We study the nonlinear energy diffusion through the SYK chain in the framework of Schwinger-Keldysh effective field theory. We analytically construct the interacting effective Lagr…
Constraints on quasinormal modes and bounds for critical points from pole-skipping
Navid Abbasi, Matthias Kaminski
We consider a holographic thermal state and perturb it by a scalar operator whose associated real-time Green's function has only gapped poles. These gapped poles correspond to the…
Complexified quasinormal modes and the pole-skipping in a holographic system at finite chemical potential
Navid Abbasi, Sara Tahery
We develop a method to study coupled dynamics of gauge-invariant variables, constructed out of metric and gauge field fluctuations on the background of a AdS Reissner-Nordström…
Quantum chaos, pole-skipping and hydrodynamics in a holographic system with chiral anomaly
Navid Abbasi, Javad Tabatabaei
It is well-known that chiral anomaly can be macroscopically detected through the energy and charge transport, due to the chiral magnetic effect. On the other hand, in a holographic…
Magneto-transport in an anomalous fluid with weakly broken symmetries, in weak and strong regime
Navid Abbasi, Armin Ghazi, Farid Taghinavaz +1
We consider a general system with weakly broken time and translation symmetries. We assume the system also possesses a symmetry which is not only weakly broken, but is anoma…
Magneto-Transport in a Chiral Fluid from Kinetic Theory
Navid Abbasi, Farid Taghinavaz, Omid Tavakol
We argue that in order to study the magneto-transport in a relativistic Weyl fluid, it is needed to take into account the associated quantum corrections, namely the side-jump effec…
Hydrodynamic Excitations from Chiral Kinetic Theory and the Hydrodynamic Frames
Navid Abbasi, Kiarash Naderi, Farid Taghinavaz
In the framework of chiral kinetic theory (CKT), we consider a system of right- and left-handed Weyl fermions out of thermal equilibrium in a homogeneous weak magnetic field. We sh…
Standardized Cumulants of Flow Harmonic Fluctuations
Navid Abbasi, Davood Allahbakhshi, Ali Davody +1
The distribution of flow harmonics in heavy ion experiment can be characterized by standardized cumulants. We first model the ellipticity and power parameters of the elliptic-power…
Collective Excitations in Hot QCD Plasma
Navid Abbasi, Davood Allahbakhshi, Ali Davody +1
We study the long wavelength excitations in rotating QCD fluid in presence of an external magnetic field at finite vector and axial charge densities. We consider the fluctuations o…
Hydrodynamic Waves in an Anomalous Charged Fluid
Navid Abbasi, Ali Davody, Kasra Hejazi +1
We study the collective excitations in a relativistic fluid with an anomalous current. In dimensions at zero chemical potential, in addition to ordinary sound modes we…
Dissipative Charged Fluid in a Magnetic Field
Navid Abbasi, Ali Davody
We study the collective excitations in a dissipative charged fluid at zero chemical potential when an external magnetic field is present. While in the absence of magnetic field, fo…
Monte Carlo Computation of Spectral Density Function in Real-Time Scalar Field Theory
Navid Abbasi, Ali Davody
Non-perturbative study of "real-time" field theories is difficult due to the sign problem. We use Bold Schwinger-Dyson (SD) equations to study the real-time theory in b…
The Energy Loss of a Heavy Quark Moving Through a General Fluid Dynamical Flow
Navid Abbasi, Ali Davody
We determine the most general form of the covariant drag force exerted on a quark moving through a fluid dynamical flow. Up to first order in derivative expansion, our general form…
The Energy Loss of a Heavy Quark Moving in a Viscous Fluid
Navid Abbasi, Ali Davody
To study the rate of energy and momentum loss of a heavy quark in QGP, specifically in the hydrodynamic regime, we use fluid/gravity duality and construct a perturbative procedure…