We investigate if the hemispherical asymmetry in the CMB is produced from “ asymmetric ” excited initial condition .
We show that in the limit where the deviations from the Bunch-Davies vacuum is large and the scale of new physics is maximally separated from the inflationary Hubble parameter , the primordial power spectrum is modulated only by position dependent dipole and quadrupole terms .
Requiring the dipole contribution in the power spectrum to account for the observed power asymmetry , A = 0.07 \pm 0.022 , we show that the amount of quadrupole terms is roughly equal to A ^ { 2 } .
The mean local bispectrum , which gets enhanced for the excited initial state , is within the 1 \sigma bound of Planck 2015 results for a large field model , f _ { NL } \simeq 4.17 , but is reachable by future CMB experiments .
The amplitude of the local non-gaussianity modulates around this mean value , depending on the angle that the correlated patches on the 2d CMB surface make with the preferred direction .
The amount of variation minimizes for the configuration in which the short and long wavelengths modes are around the preferred pole and | \vec { k } _ { 3 } | \approx| \vec { k } _ { l \approx 10 } | \ll| \vec { k } _ { 1 } | \approx| \vec { k } _ { 2 } % | \approx| \vec { k } _ { l \approx 2500 } | with f _ { NL } ^ { min } \approx 3.64 .
The maximum occurs when these modes are at the antipode of the preferred pole , f _ { NL } ^ { max } \approx 4.81 .
The difference of non-gaussianity between these two configurations is as large as \simeq 1.17 which can be used to distinguish this scenario from other scenarios that try to explain the observed hemispherical asymmetry .