Publications by Sylvain Bréchet

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Kinetic initial conditions for inflation

Sylvain Bréchet

We consider the classical evolution of the inflaton field and the Hubble parameter in homogeneous and isotropic single-field inflation models. Under an extremely broad assumption, we show that the Universe generically emerges from an initial singularity in ...

American Physical Society2014

Magnetoelectric Ponderomotive Force

Jean-Philippe Ansermet, Sylvain Bréchet, Alexandre Roulet

The dynamics of a system consisting of a matter continuum with a weak linear magnetoelectric coupling interacting with electromagnetic fields is examined on a local scale in a non-relativistic limit. A consistent expression for the internal energy of the s ...

World Scientific Publishing2013

Evidence for a Magnetic Seebeck Effect

Jean-Philippe Ansermet, Sylvain Bréchet, Francesco Antonio Vetrò, Elisa Papa

The irreversible thermodynamics of a continuous medium with magnetic dipoles predicts that a temperature gradient in the presence of magnetization waves induces a magnetic induction field, which is the magnetic analog of the Seebeck effect. This thermal gr ...

American Physical Society2013

Thermodynamics of continuous media with intrinsic rotation and magnetoelectric coupling

Jean-Philippe Ansermet, Sylvain Bréchet

The thermodynamics of an electrically charged, multicomponent continuous medium with intrinsic rotation is analysed in the presence of electromagnetic fields with a weak linear magnetoelectric coupling in the non-relativistic limit. Taking into account the ...

Springer Verlag2013

Thermodynamics of continuous media with electromagnetic fields

Jean-Philippe Ansermet, Sylvain Bréchet, François Reuse

The thermodynamics of an electrically charged, multicomponent continuous medium with electromagnetic fields is analysed in the non-relativistic limit. Applying locally the first and second law of thermodynamics and Maxwell’s equations for a linear theory o ...

Springer Verlag2012

Lagrange Equations Coupled to a Thermal Equation: Mechanics as Consequence of Thermodynamics

Sylvain Bréchet, Christian Gruber

Following the analytic approach to thermodynamics developed by Stuckelberg, we study the evolution equations of a closed thermodynamic system consisting of point particles in a fluid. We obtain a system of coupled differential equations describing the mech ...

MDPI AG2011

Heat-driven spin currents on large scales

Jean-Philippe Ansermet, Sylvain Bréchet

Using a three-current model (i.e. heat, spin-up and spin-down electrons) the thermodynamics of irreversible processes predicts that a temperature gradient gives rise to a spin current on large scales, in particular under the conditions used to measure the ...

Wiley-Blackwell2011

Cosmological Perturbation Theory

Sylvain Bréchet

Firstly, a dynamical analysis of adiabatic perturbations of a perfect fluid is performed to first-order about a general FLRW background using the 1 + 3 covariant and gauge-invariant formalism. The 1 + 3 covariant analog of the Mukhanov-Sasaki and Grishchuk ...

University of Cambridge2009

Sylvain Bréchet

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Kinetic initial conditions for inflation

Magnetoelectric Ponderomotive Force

Evidence for a Magnetic Seebeck Effect

Thermodynamics of continuous media with intrinsic rotation and magnetoelectric coupling

Thermodynamics of continuous media with electromagnetic fields

Et la lumière fut

Lagrange Equations Coupled to a Thermal Equation: Mechanics as Consequence of Thermodynamics

Heat-driven spin currents on large scales

Cosmological Perturbation Theory

Kinetic initial conditions for inflation

Magnetoelectric Ponderomotive Force

Thermodynamics of continuous media with intrinsic rotation and magnetoelectric coupling

Thermodynamics of continuous media with electromagnetic fields

Et la lumière fut

Lagrange Equations Coupled to a Thermal Equation: Mechanics as Consequence of Thermodynamics

Heat-driven spin currents on large scales

Cosmological Perturbation Theory

Evidence for a Magnetic Seebeck Effect