Position Space CMB Anomalies from Multi-Stream Inflation
arXiv:1304.0599 · doi:10.1088/1475-7516/2013/10/006
Abstract
Temporary domain walls are produced during the bifurcation era of multi-stream inflation. The observational effects from such a domain wall to spectator field perturbations are calculated, and we expect the inflationary perturbations share similarities with the case of spectator field. A domain wall induces a preferred direction in the sky, affecting the angular distribution of perturbations. A correlated suppression of multipoles together with an alignment of multipole moments on the preferred direction are generated. Other observational aspects of multi-stream inflation, including hemispherical asymmetry and cold spot are also briefly reviewed.
11 pages, 9 figures. v2: JCAP version
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