121 citations · 735 across the 39 of their papers we have counts for
11 papers · 1 filter
Global entanglement and quantum phase transitions in the transverse XY Heisenberg chain
Roya Radgohar, Afshin Montakhab
We provide a study of various quantum phase transitions occurring in the XY Heisenberg chain in a transverse magnetic field using the Meyer-Wallach (MW) measure of (global) entangl…
A molecular dynamics approach to dissipative relativistic hydrodynamics: propagation of fluctuations
Leila Shahsavar, Malihe Ghodrat, Afshin Montakhab
Relativistic generalization of hydrodynamic theory has attracted much attention from a theoretical point of view. However, it has many important practical applications in high ener…
Entropy as an adiabatic invariant
Afshin Montakhab, Arash Tavassoli
This short article was submitted to Nature Physics as a Correspondence. The intention was to provide a brief albeit significant criticism of the work of J. Dunkel and S. Hilbert, \…
Microcanonical entropy: consistency and adiabatic invariance
Arash Tavassoli, Afshin Montakhab
Attempts to establish microcanonical entropy as an adiabatic invariant date back to works of Gibbs and Hertz. More recently, a consistency relation based on adiabatic invariance ha…
Structural versus dynamical origins of mean-field behavior in a self-organized critical model of neuronal avalanches
S. Amin Moosavi, Afshin Montakhab
Critical dynamics of cortical neurons have been intensively studied over the past decade. Neuronal avalanches provide the main experimental as well as theoretical tools to consider…
Thermodynamics of a morphological transition in a relativistic gas
Afshin Montakhab, Leila Shahsavar, Malihe Ghodrat
Recently, a morphological transition in the velocity distribution of a relativistic gas has been pointed out which shows hallmarks of a critical phenomenon. Here, we provide a gene…
Mean-field behavior as a result of noisy local dynamics in self-organized criticality: Neuroscience implications
S. Amin Moosavi, Afshin Montakhab
Motivated by recent experiments in neuroscience which indicate that neuronal avalanches exhibit scale invariant behavior similar to self-organized critical systems, we study the ro…
Heat transport and diffusion in a canonical model of a relativistic gas
Malihe Ghodrat, Afshin Montakhab
Relativistic transport phenomena are important from both theoretical and practical point of view. Accordingly, hydrodynamics of relativistic gas has been extensively studied theore…
Time parameterization and stationary distributions in a relativistic gas
Malihe Ghodrat, Afshin Montakhab
In this paper we consider the effect of different time parameterizations on the stationary velocity distribution function for a relativistic gas. We clarify the distinction between…
Statistical thermodynamics of a two dimensional relativistic gas
Afshin Montakhab, Malihe Ghodrat, Mahmood Barati
In this article we study a fully relativistic model of a two dimensional hard-disk gas. This model avoids the general problems associated with relativistic particle collisions and…
Fine Structure of Avalanches in the Abelian Sandpile Model
Amir Abdolvand, Afshin Montakhab
We study the two-dimensional Abelian Sandpile Model on a square lattice of linear size L. We introduce the notion of avalanche's fine structure and compare the behavior of avalanch…