Articles by Julien Grain

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Julien Grain

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In-in formalism for the entropy of quantum fields in curved spacetimes

28 August 2024 by Thomas Colas and others

High Energy Physics, Cosmology and Nongalactic Astrophysics

Hamiltonian formalism for cosmological perturbations: fixing the gauge

29 September 2023 by Danilo Artigas and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Quantum recoherence in the early universe

29 June 2023 by Thomas Colas and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Benchmarking the cosmological master equations

2 December 2022 by Thomas Colas and others

High Energy Physics, Cosmology and Nongalactic Astrophysics

Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey

20 November 2022 by Litebird Collaboration and others

Instrumentation and Methods for Astrophysics, Cosmology and Nongalactic Astrophysics

Hamiltonian formalism for cosmological perturbations: the separate-universe approach

25 January 2022 by Danilo Artigas and others

Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology

Four-mode squeezed states: two-field quantum systems and the symplectic group \mathrm{Sp}(4,\mathbb{R})

3 January 2022 by Thomas Colas and others

Quantum Physics, Cosmology and Nongalactic Astrophysics

BISOU: a balloon project to measure the CMB spectral distortions

30 October 2021 by Bruno Maffei and others

Instrumentation and Methods for Astrophysics, Cosmology and Nongalactic Astrophysics

Unavoidable shear from quantum fluctuations in contracting cosmologies

23 March 2021 by Julien Grain and Vincent Vennin

Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology

Overview of the Medium and High Frequency Telescopes of the LiteBIRD satellite mission

1 February 2021 by Laurent Montier and others

Instrumentation and Methods for Astrophysics, Cosmology and Nongalactic Astrophysics

LiteBIRD: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization

29 January 2021 by Masasi Hazumi and others at

Japan Aerospace Exploration Agency

Instrumentation and Methods for Astrophysics, Cosmology and Nongalactic Astrophysics

Concept Design of Low Frequency Telescope for CMB B-mode Polarization satellite LiteBIRD

16 January 2021 by Yutaro Sekimoto and others at

Japan Aerospace Exploration Agency

Instrumentation and Methods for Astrophysics, Cosmology and Nongalactic Astrophysics

Canonical transformations and squeezing formalism in cosmology

30 December 2020 by Julien Grain and Vincent Vennin

Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology

Updated design of the CMB polarization experiment satellite LiteBIRD

6 January 2020 by Hideo Sugai and others

Instrumentation and Methods for Astrophysics

Fast and easy super-sample covariance of large scale structure observables

14 February 2019 by Fabien Lacasa and Julien Grain

Cosmology and Nongalactic Astrophysics

Secondary CMB anisotropies from magnetized halos --I: Power spectra of the Faraday rotation angle and conversion rate

22 October 2018 by Nadège Lemarchand and others

Cosmology and Nongalactic Astrophysics

The LiteBIRD Satellite Mission - Sub-Kelvin Instrument

24 January 2018 by Atsuyuki Suzuki and others

Instrumentation and Methods for Astrophysics, Astrophysics of Galaxies

A first step towards the inflationary trans-planckian problem treatment in Loop Quantum Cosmology

8 January 2018 by Killian Martineau and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Stochastic inflation in phase space: Is slow roll a stochastic attractor?

23 May 2017 by Julien Grain and Vincent Vennin

General Relativity and Quantum Cosmology, High Energy Physics

A new look at scalar perturbations in loop quantum cosmology: (un)deformed algebra approach using self dual variables

24 October 2016 by Jibril Ben Achour and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Cosmology without time: What to do with a possible signature change from quantum gravitational origin?

26 July 2016 by Aurélien Barrau and Julien Grain

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

The perturbed universe in the deformed algebra approach of Loop Quantum Cosmology

10 June 2016 by Julien Grain

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Detecting the tensor-to-scalar ratio with the pure pseudospectrum reconstruction of B-mode

11 November 2015 by Anthony Ferté and others

Cosmology and Nongalactic Astrophysics

Observational Exclusion of a Consistent Quantum Cosmology Scenario

31 October 2015 by Boris Bolliet and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Loop quantum gravity and observations

28 October 2015 by Aurelian Barrau and Julien Grain

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Comparison of primordial tensor power spectra from the deformed algebra and dressed metric approaches in loop quantum cosmology

7 October 2015 by B. Bolliet and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Primordial scalar power spectrum from the Euclidean Big Bounce

7 October 2015 by Susanne Schander and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

Anomaly-free cosmological perturbations in effective canonical quantum gravity

26 May 2015 by Aurelien Barrau and others

General Relativity and Quantum Cosmology, Cosmology and Nongalactic Astrophysics

The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

22 July 2014 by Kevin Macdermid and others

Instrumentation and Methods for Astrophysics

Loop Quantum Cosmology with Complex Ashtekar Variables

14 July 2014 by Jibril Ben Achour and others

General Relativity and Quantum Cosmology, High Energy Physics

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High Energy Physics Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology astro-ph Instrumentation and Methods for Astrophysics Quantum Physics Astrophysics of Galaxies History and Philosophy of Physics High Energy Astrophysical Phenomena