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    spring workshop on gravity and cosmology

    16–17 May 2019
    University of Warsaw
    Europe/Zurich timezone

    Session

    Inflation and PBH (III)

    17 May 2019, 09:00
    2.46 (faculty of physics)

    2.46

    faculty of physics

    university of warsaw

    Conveners

    Inflation and PBH (III)

    • Krzysztof Turzynski (University of Warsaw)

    Presentation materials

    There are no materials yet.

    1. 12. Numerical simulation of Primordial Black Holes
      Albert Escrivà
      17/05/2019, 09:00

      In this talk I will present a fast and new procedure to calculate the averaged mass excess threshold δc of primordial black holes from a given cosmological perturbation profile using pseudo-spectral methods, numerically solving the Misner-Sharp equations. I apply the method in the cosmological context to put constraints on the inflationary power spectrum.

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    2. 10. Primordial Black Holes abundance
      Cristiano Germani
      17/05/2019, 09:30

      In this talk I will discuss how to calculate the abundance of primordial black holes given an inflationary power spectrum

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    3. 13. Failure of the stochastic approach to inflation beyond slow-roll
      Diego Cruces (ICC. UB)
      17/05/2019, 10:45

      After giving a pedagogical review I will clarify that the stochastic approach to inflation is generically reliable only at zeroth order in the (geometrical) slow-roll parameter ϵ_1 if and only if ϵ2_2≪6/ϵ_1, with the notable exception of slow-roll. This is due to the failure of the stochastic ΔN formalism in its standard formulation. However, by keeping the formalism in its regime of validity,...

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    4. 8. Inflationary correlators from the stochastic spectral expansion
      Mr Tommi Markkanen
      17/05/2019, 11:15

      Continuing on the topic of the stochastic formalism, in this talk I will present the lesser known stochastic spectral expansion and show how it can be used to calculate correlation functions generated during inflation. I also discuss the shortcomings of some of the commonly used approximations and present the full stochastic calculation for the isocurvature spectrum of a decoupled spectator,...

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    5. 14. free discussion
      17/05/2019, 12:00
    6. 15. Properties of the primordial power spectrum for PBH production
      Ioannis Dalianis ( NTU Athens)
      17/05/2019, 14:00

      I will discuss the properties of the primordial power spectrum so that PBHs are produced in accordance with the constraints coming from the CMB and BBN observables. I will mainly focus on the large wavenumbers of the power spectrum where, if there is a peak, PBH with sub-solar masses are generated. Then I will describe the scenario that the dark matter in the universe is comprised either of...

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    7. 16. Oscillations that mimick weak lensing
      Guillem Domenech (uni. heidelberg)
      17/05/2019, 15:15

      The latest Planck’s analysis of the power spectrum finds 10% more lensing smoothing than predicted by LCDM at 2 sigma. If it is not a statistical fluke, it could indicate new physics that mimick the smoothing effect of lensing. What could that be and how was generated? First, I will show you that oscillations in the primordial power spectrum with the same frequency as the acoustic peaks but...

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    8. 17. free discussion
      17/05/2019, 16:00
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