Is the Lopsided Universe an Open Universe?

An Open Universe From Inflation

We present a natural scenario for obtaining an open universe (Ω0 < 1) through inflation. In this scenario, there are two epochs of inflationary expansion—an epoch of ‘old inflation,’ during which the inflaton field is stuck in a false vacuum, followed by an epoch of ‘new inflation,’ during which the inflaton field slowly rolls toward its true minimum. During the first epoch, inflation solves th...

Gott-Kaiser-Stebbins (GKS) effect in an accelerated expanding universe

Wewanttofindthecosmologicalconstantinfluenceoncosmicmicrowavebackground(CMB)temperatureduetomovinglinearcosmicstrings.Usingthespace-timemetricofalinearcosmicstringinanacceleratedexpandinguniverse,theGott-Kaiser Stebbins(GKS)effect,asanimportantmechanisminproducingtemperaturediscontinuityinthe(CMB),isconsidered;then,itsmodificationduetotheeffectofthecosmologicalconstantiscalculated.Theresultshowsthat...

Fractal Cosmology in an Open Universe

– The clustering of galaxies is well characterized by fractal properties, with the presence of an eventual cross-over to homogeneity still a matter of considerable debate. In this letter we discuss the cosmological implications of a fractal distribution of matter, with a possible cross-over to homogeneity at an undetermined scale Rhomo. Contrary to what is generally assumed, we show that, even ...

An Open Universe from Valley Bounce

It appears difficult to construct a simple model for an open universe based on the one bubble inflationary scenario. The reason is that one needs a large mass to avoid the tunneling via the Hawking Moss solution and a small mass for successful slowrolling. However, Rubakov and Sibiryakov suggest that the Hawking Moss solution is not a solution for the false vacuum decay process because it does ...

Matter-microwave correlations in an open universe.