New probes of initial state of quantum fluctuations during inflation

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Ganc, PRD 84, 063514 (2011); Ganc & Komatsu (2012) CMB Bispectrum • The expected contribution to fNL as measured by the CMB bispectrum is typically fNL≈8(ε/0.01). • A lot bigger than (5/12)(1–nS), and could be detectable with Planck. • Note that this does not mean a violation of the singlefield consistency condition, which is valid in the exact squeezed limit, k3->0. • We have an enhanced bispectrum in the squeezed configuration where k3/k1 is small but finite. 50
Brightness, W/m 2 /sr/Hz 3m 4K Black-body 2.725K Black-body 2K Black-body Rocket (COBRA) Satellite (COBE/FIRAS) CN Rotational Transition Ground-based Balloon-borne Satellite (COBE/DMR) 30cm Using the distortion of the thermal spectrum of CMB, we can reach k3/k1 as small as 10 –8 ! (Pajer & Zaldarriaga 2012) Wavelength (plot from Samtleben et al. 2007) 3mm 0.3mm 51
Page 1 and 2: New Probes of Initial State of Quan
Page 3 and 4: (Temperature Fluctuation) 2 Does th
Page 5 and 6: Falsifying “inflation” • We s
Page 7 and 8: An Easy One: Adiabaticity • Singl
Page 9 and 10: Single-field inflation looks good (
Page 11 and 12: MOST IMPORTANT, for falsifying sing
Page 13 and 14: Action • Einstein’s gravity + a
Page 15 and 16: Initial Vacuum State ζ • Bunch-D
Page 17 and 18: Taking the squeezed limit Maldacena
Page 19 and 20: Maldacena (2003); Seery & Lidsey (2
Page 21 and 22: Maldacena (2003); Seery & Lidsey (2
Page 23 and 24: Limits on fNL • fNL = 32 ± 21 (6
Page 25 and 26: ζkL rescales coordinates • The l
Page 27 and 28: ζkL rescales coordinates • Q. Ho
Page 29 and 30: This is great, but... • The proof
Page 31 and 32: (3) S S ζL Ganc & Komatsu, JCAP, 1
Page 33 and 34: Result • Although this expression
Page 35 and 36: Starobinsky’s Potential • This
Page 37 and 38: Initial Vacuum State? • What we l
Page 39 and 40: Matter Power Spectrum • With larg
Page 41 and 42: Back to in-in • The Bunch-Davies
Page 43 and 44: ζ How about the consistency relati
Page 45 and 46: Power Spectrum of Galaxies • Gala
Page 47 and 48: Galaxy clustering modified by the s
Page 49: Δbgalaxy(k)/bgalaxy ~k -2 Local (f
Page 53 and 54: Chemical potential from energy inje
Page 55 and 56: Chemical potential from energy inje
Page 57 and 58: How much energy? • Only 1/3 of th
Page 59 and 60: μ-distortion modified by the squee
Page 61 and 62: More exact treatment • Going to h
Page 63 and 64: μ-T cross-correlation Local-form R
Page 65 and 66: Signal-to-noise But, a modified ini
Page 67: New probes of initial state of quan

New probes of initial state of quantum fluctuations during inflation

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