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Causal Thermodynamics in Relativity
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I review the causal relativistic thermodynamics developed by Israel and Stewart, and discuss some applications in cosmology and astrophysics. The lectures begin with an overview of relativistic fluid dynamics (in a covariant formalism) and equilibrium thermodynamics. Causal bulk viscosity in cosmology is considered in detail, including some new results.
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Cited by 11 Pith papers
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Eckart heat-flux applicability in $F(\Phi,X)R$ theories and the existence of temperature gradients
Eckart heat flux holds for all timelike scalar configurations in F(Φ,X)R + G theories if and only if F_X ≡ 0, reducing the theory to a Jordan-like subclass of Horndeski.
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Relativistic dissipative fluids in the trace-fixed particle frame: Hyperbolicity, causality, and stability
A first-order relativistic dissipative fluid theory in the trace-fixed particle frame is shown to be hyperbolic, causal, and stable for hard-sphere and hard-disk gases under an explicit inequality.
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Post-Inflationary Constraints on Nonminimally Coupled Quintessential Inflation
Gravitational-wave constraints on the reheating temperature rule out single-exponential nonminimally coupled quintessential inflation and require a double-exponential coupling that predicts thawing dark energy with w0...
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Constraints on the Phenomenology of Dissipative Cosmological Memory from BAO (BOSS + DESI 2024) and Pantheon+ Data
A three-parameter dissipative memory model is tested on BOSS, DESI 2024, and Pantheon+ data and found to be indistinguishable from Lambda CDM with epsilon below 0.05 at 95 percent CL for low redshifts.
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Towards a causal effective thermodynamics of scalar-tensor gravity
Extends scalar-tensor gravity thermodynamics to causal Israel-Stewart model via timelike heat flux ansatz, decoupling T and K while preserving GR equilibrium.
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Thermal channels of scalar and tensor waves in Jordan-frame scalar--tensor gravity
Scalar and tensor perturbations in Jordan-frame scalar-tensor gravity admit an exact linear-order Eckart effective-fluid description, with gravitational-wave damping governed by the scalar sector's transverse-traceles...
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New interpretation of the Minkowski limit of $R^2$ gravity
The Minkowski limit of pure R² gravity is reinterpreted as a thermal singularity via scalar-tensor to Eckart fluid analogy, showing infinite departure from GR rather than recovery.
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Traversable Wormhole De-singularization: Almost $\eta$-Ricci-Yamabe Solitons in Static Spherically Symmetric Imperfect Fluid Spacetimes
The paper argues that an almost η-Ricci-Yamabe soliton can turn a static black hole into a traversable wormhole, but the argument reduces to coordinate identities and an inconsistent horizon condition.
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Causality and thermodynamics in anisotropic fluids
A particle-frame extension of Eckart and Israel-Stewart thermodynamics to anisotropic fluids, with an explicit anisotropic entropy-production term.
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On the Field Theoretical Description of an Alternative Model to Generalized Chaplygin Gas and its Thermodynamic Behaviour
The authors reconstruct quintessence, k-essence, and DBI scalar-field potentials for the sinc dark-energy fluid, but their thermodynamic phase transition is built from arbitrary constants and the model is disfavored b...
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Cosmological scenario based on the particle creation and holographic equipartition
A cosmological scenario with particle creation maintaining holographic equipartition yields exponential, radiation, power-law, and de Sitter scale factors, but leaves transition mechanisms and parameter constraints un...
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