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PITT PACC Workshop: Non-Standard Cosmological Epochs and Expansion Histories

5–7 Sept 2024
US/Eastern timezone

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Contribution List

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  1. 1. Welcome
    Brian Thomas Batell
    05/09/2024, 09:00
  2. 30. Workshop overview
    Brooks Thomas
    05/09/2024, 09:10
  3. 2. Introductions
    05/09/2024, 09:30
  4. 3. Block I: Connection to Observation: Overview - Presentation
    Andrew Long (Rice University), Kuver Sinha (University of Oklahoma)
    05/09/2024, 11:00

    Co-Discussion Leaders: Andrew Long, Kuver Sinha

    This block is focused broadly on observational methods which can be used to probe the
    expansion history of the universe – potentially including probes which are potentially
    promising yet underappreciated – and how experimental efforts over the next decade or
    so are likely to improve our understanding of that expansion history on various...

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  5. 31. Block I: Connection to Observation: Overview - Discussion
    Andrew Long (Rice University), Kuver Sinha (University of Oklahoma)
    05/09/2024, 11:30

    Co-Discussion Leaders: Andrew Long, Kuver Sinha

    This block is focused broadly on observational methods which can be used to probe the
    expansion history of the universe – potentially including probes which are potentially
    promising yet underappreciated – and how experimental efforts over the next decade or
    so are likely to improve our understanding of that expansion history on various...

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  6. 6. Block II: Scalar Fields and Non-Standard Expansion Histories I (Top-Down Realizations and Implications for Structure Formation) - Presentation
    Rouzbeh Allahverdi (University of New Mexico), Dr Sten Delos (Max Planck Institute for Astrophysics)
    05/09/2024, 14:00

    Co-Discussion Leaders: Rouzbeh Allahverdi, Sten Delos

    This is the first of two blocks focused on modifications to the cosmological expansion history which can arise in the presence of additional scalar fields (other than epochs of early matter domination, which are not unique to scalars and thus will be covered in a different block). Such modifications include, for example, early dark...

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  7. 34. Block II: Scalar Fields and Non-Standard Expansion Histories I (Top-Down Realizations and Implications for Structure Formation) - Discussion
    Rouzbeh Allahverdi (University of New Mexico), Dr Sten Delos (Max Planck Institute for Astrophysics)
    05/09/2024, 14:30

    Co-Discussion Leaders: Rouzbeh Allahverdi, Sten Delos

    This is the first of two blocks focused on modifications to the cosmological expansion history which can arise in the presence of additional scalar fields (other than epochs of early matter domination, which are not unique to scalars and thus will be covered in a different block). Such modifications include, for example, early dark...

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  8. 4. Block III: Gravitational-Wave Signals in Modified Cosmologies - Presentation
    Prof. Kimberly Boddy (University of Texas at Austin), Lauren Pearce (Penn State University-New Kensington)
    05/09/2024, 16:00

    Co-Discussion Leaders: Kim Boddy, Lauren Pearce

    This block is focused on the gravitational-wave signatures that can arise in cosmological
    scenarios involving modified expansion histories and the manner in which these signals
    may be correlated with other observational signatures which might arise in such
    scenarios.

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  9. 33. Block III: Gravitational-Wave Signals in Modified Cosmologies - Discussion
    Prof. Kimberly Boddy (University of Texas at Austin), Lauren Pearce (Penn State University-New Kensington)
    05/09/2024, 16:30

    Co-Discussion Leaders: Kim Boddy, Lauren Pearce

    This block is focused on the gravitational-wave signatures that can arise in cosmological
    scenarios involving modified expansion histories and the manner in which these signals
    may be correlated with other observational signatures which might arise in such
    scenarios.

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  10. 5. Block IV: Early Matter-Dominated Eras - Presentation
    Adrienne Erickcek, Dr Jessie Shelton (University of Illinois, Urbana-Champaign)
    06/09/2024, 09:00

    Co-Discussion Leaders: Adrienne Erickcek, Jessie Shelton, Rouzbeh Allahverdi

    This block is focused on early matter-dominated eras (EMDEs) and their
    phenomenological/observational consequences, including implications for dark-matter
    production and for structure on small scales.

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  11. 32. Block IV: Early Matter-Dominated Eras - Discussion
    Adrienne Erickcek, Dr Jessie Shelton (University of Illinois, Urbana-Champaign)
    06/09/2024, 09:30

    Co-Discussion Leaders: Adrienne Erickcek, Jessie Shelton, Rouzbeh Allahverdi

    This block is focused on early matter-dominated eras (EMDEs) and their
    phenomenological/observational consequences, including implications for dark-matter
    production and for structure on small scales.

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  12. 7. Block V: Scalar Fields and Non-Standard Expansion Histories II (Specific Models) - Presentation
    Akshay Ghalsasi (University of Pittsburgh), Tristan Smith (Swarthmore College)
    06/09/2024, 11:00

    Co-Discussion Leaders: Akshay Ghalsasi, Tristan Smith

    This is the second of two blocks focused on modifications to the cosmological expansion history which can arise in the presence of additional scalar fields (other than epochs of early matter domination, which are not unique to scalars and thus will be covered in a different block). Such modifications include, for example, early dark...

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  13. 35. Block V: Scalar Fields and Non-Standard Expansion Histories I (Specific Models) - Discussion
    Akshay Ghalsasi (University of Pittsburgh), Tristan Smith (Swarthmore College)
    06/09/2024, 11:30

    Co-Discussion Leaders: Akshay Ghalsasi, Tristan Smith

    This is the second of two blocks focused on modifications to the cosmological expansion history which can arise in the presence of additional scalar fields (other than epochs of early matter domination, which are not unique to scalars and thus will be covered in a different block). Such modifications include, for example, early dark...

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  14. 8. Block VI: Connections to Fundamental Theory - Presentation
    Prof. Gary Shiu (University of Wisconsin-Madison), Halverson Jim
    06/09/2024, 14:00

    Co-Discussion Leaders: Jim Halverson, Gary Shiu

    This block is focused on the connections between non-standard expansion histories and
    fundamental theory. To what extent do different top-down scenarios for physics beyond
    the Standard Model, including string theory, predict departures from the standard
    cosmology? Conversely, were we to obtain observational evidence that indeed...

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  15. 36. Block VI: Connections to Fundamental Theory - Discussion
    Prof. Gary Shiu (University of Wisconsin-Madison), Halverson Jim
    06/09/2024, 14:30

    Co-Discussion Leaders: Jim Halverson, Gary Shiu

    This block is focused on the connections between non-standard expansion histories and
    fundamental theory. To what extent do different top-down scenarios for physics beyond
    the Standard Model, including string theory, predict departures from the standard
    cosmology? Conversely, were we to obtain observational evidence that indeed...

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  16. 9. Block VII: How Inflation Ends: Non-Standard Possibilities - Presentation
    Mustafa Amin, Tom Giblin (Kenyon College)
    06/09/2024, 16:00

    Co-Discussion Leaders: Mustafa Amin, Tom Giblin

    This block is focused on the manner in which inflation ends and on the modifications to
    the subsequent cosmological timeline that can take place in particular kinds of
    inflationary scenarios. This includes scenarios in which reheating takes place at late
    times/low temperatures, and also scenarios in which states/structures produced at...

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  17. 37. Block VII: How Inflation Ends: Non-Standard Possibilities - Discussion
    Mustafa Amin, Tom Giblin (Kenyon College)
    06/09/2024, 16:30

    Co-Discussion Leaders: Mustafa Amin, Tom Giblin

    This block is focused on the manner in which inflation ends and on the modifications to
    the subsequent cosmological timeline that can take place in particular kinds of
    inflationary scenarios. This includes scenarios in which reheating takes place at late
    times/low temperatures, and also scenarios in which states/structures produced at...

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  18. 10. Block VIII: Cosmological Stasis - Presentation
    Fei Huang (ITP CAS and UC Irvine)
    07/09/2024, 09:00

    Co-Discussion Leaders: Fei Huang

    This block is focused on cosmological stasis, its realizations within the context of
    particular scenarios beyond the Standard Model, and its potential observational
    consequences.

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  19. 38. Block VIII: Cosmological Stasis - Discussion
    Fei Huang (ITP CAS and UC Irvine)
    07/09/2024, 09:30

    Co-Discussion Leaders: Fei Huang

    This block is focused on cosmological stasis, its realizations within the context of
    particular scenarios beyond the Standard Model, and its potential observational
    consequences.

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  20. 11. Block IX: Primordial-Black-Hole Domination - Presentation
    Barmak Shams Es Haghi (University of Texas at Austin)
    07/09/2024, 11:00

    Co-Discussion Leaders: Barmak Shams Es Haghi

    This block is focused on epochs of primordial-black-hole (PBH) domination and their
    potential consequences – including, for example, possible implications for dark-matter
    physics, gravitational-wave physics, and the generation of the baryon asymmetry of the
    universe. An early matter-dominated eras (EMDEs) can of course arise within...

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  21. 39. Block IX: Primordial-Black-Hole Domination - Discussion
    Barmak Shams Es Haghi (University of Texas at Austin)
    07/09/2024, 11:30

    Co-Discussion Leaders: Barmak Shams Es Haghi

    This block is focused on epochs of primordial-black-hole (PBH) domination and their
    potential consequences – including, for example, possible implications for dark-matter
    physics, gravitational-wave physics, and the generation of the baryon asymmetry of the
    universe. An early matter-dominated eras (EMDEs) can of course arise within...

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  22. 28. Block I: Connection to Observation: Overview
  23. 29. Block III: Early Matter-Dominated Eras
  24. 14. Block IX: Primordial-Black-Hole Domination

    Barmak Shams & Es Haghi.

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  25. 12. Block VII: How Inflation Ends: Non-Standard Possibilities

    Mustafa Amin & Tom Giblin.

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  26. 13. Block VIII: Cosmological Stasis

    Fei Huang.

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  27. 21. Discussion
  28. 23. Discussion
  29. 24. Discussion
  30. 25. Discussion
  31. 22. Discussions
  32. 27. Introductions
  33. 15. Talk
  34. 17. Talk
  35. 18. Talk
  36. 26. Talk
  37. 19. Workshop Banquet
  38. 20. Workshop Opening