# Eternal inflation, bubble collisions, and the disintegration of the persistence of memory

@article{Freivogel2009EternalIB, title={Eternal inflation, bubble collisions, and the disintegration of the persistence of memory}, author={Ben Freivogel and Matthew Kleban and Alberto Nicolis and Kris Sigurdson}, journal={Journal of Cosmology and Astroparticle Physics}, year={2009}, volume={2009}, pages={036-036} }

We compute the probability distribution for bubble collisions in an inflating false vacuum which decays by bubble nucleation. Our analysis generalizes previous work of Guth, Garriga, and Vilenkin to the case of general cosmological evolution inside the bubble, and takes into account the dynamics of the domain walls that form between the colliding bubbles. We find that incorporating these effects changes the results dramatically: the total expected number of bubble collisions in the past…

## 49 Citations

### Analyzing cosmic bubble collisions

- Physics
- 2012

We develop a set of controlled, analytic approximations to study the effects of bubble collisions on cosmology. We expand the initial perturbation to the inflaton field caused by the collision in a…

### Analyzing Cosmic Bubble Collisions

- Physics
- 2012

We develop a set of controlled, analytic approximations to study the effects of bubble collisions on cosmology. We expand the initial perturbation to the inflaton field caused by the collision in a…

### Watching worlds collide: effects on the CMB from cosmological bubble collisions

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- 2008

We extend our previous work on the cosmology of Coleman-de Luccia bubble collisions. Within a set of approximations we calculate the effects on the cosmic microwave background (CMB) as seen from…

### Observable effects of anisotropic bubble nucleation

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- 2010

Our universe may have formed via bubble nucleation in an eternally-inflating background. Furthermore, the background may have a compact dimension — the modulus of which tunnels out of a metastable…

### Bubble collisions and measures of the multiverse

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- 2012

To compute the spectrum of bubble collisions seen by an observer in an eternally-inflating multiverse, one must choose a measure over the diverging spacetime volume, including choosing an ``initial''…

### Simulating the universe(s) III: observables for the full bubble collision spacetime

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- 2015

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…

### Simulating the universe(s): from cosmic bubble collisions to cosmological observables with numerical relativity

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- 2014

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.…

### Bubble, Bubble, Flow and Hubble: Large Scale Galaxy Flow from Cosmological Bubble Collisions

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- 2009

We study large scale structure in the cosmology of Coleman-de Luccia bubble collisions. Within a set of controlled approximations we calculate the effects on galaxy motion seen from inside a bubble…

### Odds of observing the multiverse

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- 2010

Eternal ination predicts our observable universe lies within a bubble (or pocket universe) embedded in a volume of inating space. The interior of the bubble undergoes ination and standard cosmology,…

### Testing eternal inflation with the kinetic Sunyaev Zel'dovich effect

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- 2015

Perhaps the most controversial idea in modern cosmology is that our observable universe is contained within one bubble among many, all inhabiting the eternally inflating multiverse. One of the few…

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