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8 research outcomes, page 1 of 1
  • publication . Article . Preprint . 2014
    Open Access
    Authors:
    Wainwright, Carroll L.; Johnson, Matthew C.; Aguirre, Anthony; Peiris, Hiranya V.;
    Persistent Identifiers
    Publisher: IOP Publishing
    Project: EC | COSMICDAWN (306478)

    Observing the relics of collisions between bubble universes would provide direct evidence for the existence of an eternally inflating Multiverse; the non-observation of such events can also provide important constraints on inflationary physics. Realizing these prospects...

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  • publication . Article . Preprint . 2014
    Open Access English
    Authors:
    Stephen M. Feeney; Domenico Marinucci; Jason D. McEwen; Hiranya V. Peiris; Benjamin D. Wandelt; Valentina Cammarota;
    Persistent Identifiers
    Country: Italy
    Project: ANR | SUPER (ANR-11-IDEX-0004), EC | PASCAL (277742), EC | COSMICDAWN (306478)

    Sparse inpainting techniques are gaining in popularity as a tool for cosmological data analysis, in particular for handling data which present masked regions and missing observations. We investigate here the relationship between sparse inpainting techniques using the sp...

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  • publication . Article . Preprint . 2015
    Open Access English
    Authors:
    Bond, J. Richard; Mersini-Houghton, Laura; Braden, Jonathan;
    Project: NSERC , EC | COSMICDAWN (306478)

    We study collisions between pairs of bubbles nucleated in an ambient false vacuum. For the first time, we include the effects of small initial (quantum) fluctuations around the instanton profiles describing the most likely initial bubble profile. Past studies of this pr...

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  • publication . Preprint . Article . 2014
    Open Access English
    Authors:
    Wainwright, Carroll L.; Johnson, Matthew C.; Peiris, Hiranya V.; Aguirre, Anthony; Lehner, Luis; Liebling, Steven L.;
    Persistent Identifiers
    Country: Italy
    Project: NSF | Collaborative Research: L... (1308621), EC | COSMICDAWN (306478), NSERC , NSF | Collaborative Research: D... (0969827)

    The theory of eternal inflation in an inflaton potential with multiple vacua predicts that our universe is one of many bubble universes nucleating and growing inside an ever-expanding false vacuum. The collision of our bubble with another could provide an important obse...

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  • publication . Article . Preprint . 2018
    Open Access English
    Authors:
    Jonathan Braden; Matthew C. Johnson; Hiranya V. Peiris; Silke Weinfurtner;
    Persistent Identifiers
    Publisher: Springer Verlag
    Country: United Kingdom
    Project: NSF | Programs on Critical Prob... (1066293), EC | COSMICDAWN (306478)

    Analog condensed matter systems present an exciting opportunity to simulate early Universe models in table-top experiments. We consider a recent proposal for an analog condensed matter experiment to simulate the relativistic quantum decay of the false vacuum. In the pro...

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  • publication . Article . Preprint . 2016
    Open Access English
    Authors:
    Matthew C. Johnson; Carroll L. Wainwright; Anthony Aguirre; Hiranya V. Peiris;
    Persistent Identifiers
    Project: EC | COSMICDAWN (306478), NSF | Programs on Critical Prob... (1066293)

    This is the third paper in a series establishing a quantitative relation between inflationary scalar field potential landscapes and the relic perturbations left by the collision between bubbles produced during eternal inflation. We introduce a new method for computing c...

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  • publication . Preprint . Article . 2015
    Open Access English
    Authors:
    Braden, JonathanCITA, University of Toronto, 60 St. George Street, Toronto, ON, M5S 3H8, Canada; Bond, J. Richard(CITA, University of Toronto, 60 St. George Street, Toronto, ON, M5S 3H8, Canada); Mersini-Houghton, Laura(Department of Physics and Astronomy, University of North Carolina-Chapel Hill, 1 Phillips Hall, 120 E. Cameron Avenue, Chapel Hill, NC 27599-3255, U.S.A.);
    Country: Italy
    Project: NSERC , EC | COSMICDAWN (306478)

    We study collisions between nearly planar domain walls including the effects of small initial nonplanar fluctuations. These perturbations represent the small fluctuations that must exist in a quantum treatment of the problem. In a previous paper, we demonstrated that at...

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  • publication . Article . Preprint . 2019
    Open Access English
    Authors:
    Braden, Jonathan; Johnson, Matthew C.; Peiris, Hiranya V.; Pontzen, Andrew; Weinfurtner, Silke;
    Persistent Identifiers
    Publisher: APS
    Project: EC | COSMICDAWN (306478), UKRI | Black Hole Superradiance ... (EP/P00637X/1)

    We introduce a new picture of vacuum decay which, in contrast to existing semiclassical techniques, provides a real-time description and does not rely on classically-forbidden tunneling paths. Using lattice simulations, we observe vacuum decay via bubble formation by ge...

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8 research outcomes, page 1 of 1