Person
Mikhail Ivanov
This person is no longer with EPFL
Related publications (12)
Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies
Frédéric Courbin, Richard Irving Anderson, Julien Lesgourgues, Mikhail Ivanov, Fabio Finelli, Adriano Agnello, Jie Wang, Florian Niedermann, Emre Ozulker, Melissa Joseph, Suresh Kumar, Hsin-Yu Chen
The standard Lambda Cold Dark Matter (Lambda CDM) cosmological model provides a good description of a wide range of astrophysical and cosmological data. However, there are a few big open questions that make the standard model look like an approximation to ...
ELSEVIER2022Precision theoretical methods for large-scale structure of the Universe
We develop new analytic methods to accurately describe the formation of cosmic large-scale structure. These methods are based on the path integral formalism and allows one to efficiently address a number of long-standing problems in the field.
We describe ...
EPFL2019Constraining the photon coupling of ultra-light dark-matter axion-like particles by polarization variations of parsec-scale jets in active galaxies
Dark matter may consist of axion-like particles with ultra-low masses. Two-photon interactions of these particles affect the polarization of radiation propagating through the dark matter. Coherent oscillations of the Bose condensate of the particles induce ...
IOP PUBLISHING LTD2019Non-perturbative probability distribution function for cosmological counts in cells
Sergey Sibiryakov, Mikhail Ivanov
We present a non-perturbative calculation of the 1-point probability distribution function (PDF) for the spherically-averaged matter density field. The PDF is represented as a path integral and is evaluated using the saddle-point method. It factorizes into ...
IOP PUBLISHING LTD2019Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features
We extend the formalism of time-sliced perturbation theory (TSPT) for cosmological large-scale structure to include non-Gaussian initial conditions. We show that in such a case the TSPT interaction vertices acquire new contributions whose time-dependence f ...
IOP PUBLISHING LTD2019Time-sliced perturbation theory for large scale structure I: general formalism
Sergey Sibiryakov, Diego Blas Temino, Mikhail Ivanov
We present a new analytic approach to describe large scale structure formation in the mildly non-linear regime. The central object of the method is the time-dependent probability distribution function generating correlators of the cosmological observables ...
Iop Publishing Ltd2016Constraining the production of cosmic rays by pulsars
One of the possible sources of hadronic cosmic rays (CRs) are newborn pulsars. If this is indeed the case, they should feature diffusive gamma-ray halos produced by interactions of CRs with interstellar gas. In this paper we try to identify extended gamma- ...
Amer Physical Soc2016Time-sliced perturbation theory II: baryon acoustic oscillations and infrared resummation
Sergey Sibiryakov, Diego Blas Temino, Mikhail Ivanov
We use time-sliced perturbation theory (TSPT) to give an accurate description of the infrared non-linear effects affecting the baryonic acoustic oscillations (BAO) present in the distribution of matter at very large scales. In TSPT this can be done via a s ...
Iop Publishing Ltd2016Systematic treatment of non-linear effects in Baryon Acoustic Oscillations
In this contribution we will discuss the non-linear effects in the baryon acoustic oscillations and present a systematic and controllable way to account for them within time-sliced perturbation theory. ...
EDP Sciences2016On constraining the speed of gravitational waves following GW150914
Sergey Sibiryakov, Diego Blas Temino, Mikhail Ivanov
We point out that the observed time delay between the detection of the signal at the Hanford and Livingston LIGO sites from the gravitational wave event GW150914 places an upper bound on the speed of propagation of gravitational waves, c (gw) ae(2) 1.7 in ...
Springer Verlag2016