The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations

Abstract

The Primordial Inflation Explorer (PIXIE) is an Explorer-class mission to measure the gravity-wave signature of primordial inflation through its distinctive imprint on the linear polarization of the cosmic microwave background. The instrument consists of a polarizing Michelson interferometer configured as a nulling polarimeter to measure the difference spectrum between orthogonal linear polarizations from two co-aligned beams. Either input can view the sky or a temperature-controlled absolute reference blackbody calibrator. PIXIE will map the absolute intensity and linear polarization (Stokes I, Q, and U parameters) over the full sky in 400 spectral channels spanning 2.5 decades in frequency from 30 GHz to 6 THz (1 cm to 50 um wavelength). Multi-moded optics provide background-limited sensitivity using only 4 detectors, while the highly symmetric design and multiple signal modulations provide robust rejection of potential systematic errors. The principal science goal is the detection and characterization of linear polarization from an inflationary epoch in the early universe, with tensor-to-scalar ratio r < 10^{-3} at 5 standard deviations. The rich PIXIE data set will also constrain physical processes ranging from Big Bang cosmology to the nature of the first stars to physical conditions within the interstellar medium of the Galaxy.

37 pages including 17 figures. Submitted to the Journal of Cosmology and Astroparticle Physics

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• Test of the Einstein equivalence principle with spectral distortions in the cosmic microwave background
• Angular correlations on causally-coherent inflationary horizons
• Supersymmetric Hybrid Inflation in Light of CMB Experiments and Swampland Conjectures
• Observing the Epoch of Reionization with the Cosmic Microwave Background
• Energy injection in pre-recombination era and EDGES detection
• Synthetic Gravitational Waves from a Rolling Axion Monodromy
• The Integration and Testing Program for the Simons Observatory Large Aperture Telescope Optics Tubes
• Cosmology with Recombination Spectrum
• Non-standard hierarchies of the runnings of the spectral index in inflation
• Updated Constraints on Large Field Hybrid Inflation
• The Polarization Signature of Local Bulk Flows
• Effects of observer peculiar motion on the isotropic background frequency spectrum: from monopole to higher multipoles
• Bandpass mismatch error for satellite CMB experiments II: Correcting for the spurious signal
• Probing the global 21-cm background by velocity-induced dipole and quadrupole anisotropies
• Spontaneous baryogenesis in spiral inflation
• Beware of the running $n_s$ when producing heavy primordial black holes
• Updated cosmological constraints on Macroscopic Dark Matter
• Hidden Photon and Axion Dark Matter from Symmetry Breaking
• Spectral Distortion Signatures of Step-like Inflationary Potential
• Primordial black holes save $R^2$ inflation
• Dark Matter, Neutrino mass, Cutoff for Cosmic-Ray Neutrino, and Higgs Boson Invisible Decay from a Neutrino Portal Interaction
• Inflationary field excursion in broad classes of scalar field models
• Cosmological consequences of statistical inhomogeneity
• Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation
• Smooth $\mu$-Hybrid and Non-Minimal Higgs Inflation in $SU(4{)}_C\times SU(2{)}_L\times SU(2{)}_R$ With Observable Gravitational Waves
• The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10-20 GHz sky spectra
• Cosmic microwave background polarization in Noncommutative space-time
• A Bayesian ILC method for CMB B-mode posterior estimation and reconstruction of primordial gravity wave signal
• CMB lensing forecasts for constraining the primordial perturbations: adding to the CMB temperature and polarization information
• Effects on the CMB from magnetic field dissipation before recombination
• Feasibility of Cosmic Microwave Background Observations using Radiometers based on Whispering Gallery Mode Resonators
• EDGES of the dark forest: A new absorption window into the composite dark matter and large scale structure
• On the Impact of Random Residual Calibration Error on the Gibbs ILC Estimates over Large Angular Scales
• An introduction to inflation after Planck: from theory to observations
• Anomalies of Cosmic Anisotropy from Holographic Universality of Great-Circle Variance
• E and B modes of the CMB y-type distortions: polarised kinetic Sunyaev-Zeldovich effect from the reionisation and post-reionisation eras
• Challenges and prospects for better measurements of the CMB intensity spectrum
• The Upper Bound on the Tensor-to-Scalar Ratio Consistent with Quantum Gravity
• ALP Dark Matter from Kinetic Fragmentation: Opening up the Parameter Window
• SPECTER: An Instrument Concept for CMB Spectral Distortion Measurements with Enhanced Sensitivity
• Constraining the halo-ISM connection through multi-transition carbon monoxide line-intensity mapping
• CMB spectroscopy at third-order in cosmological perturbations
• Mixed Inflaton and Spectator Field Models: CMB constraints and $\mu$ distortion
• Polarized Beam Patterns from a Multi-Moded Feed For Observations of the Cosmic Microwave Background
• The Forward Physics Facility at the High-Luminosity LHC
• The non-thermal secondary CMB anisotropies from a cosmic distribution of radio galaxy lobes
• Indirect detection of long-lived particles in a rich dark sector with a dark vector portal
• Extreme Digitisation For Ground-Based Cosmic Microwave Background Experiments
• Searches for stochastic gravitational-wave backgrounds
• Robust Likelihoods for Inflationary Gravitational Waves from Maps of Cosmic Microwave Background Polarization
• Fifty shades of grayness: parametrizations of spectral distortions and applications in cosmology
• Status of CMB observations in 2015
• Constraining self-interacting ultrahigh-energy muon neutrinos by cosmic microwave background spectral distortion
• Spectral distortions in the decaying QCD dark matter scenario
• Primordial magnetic non-Gaussianity with generic vacua and detection prospects in CMB spectral distortions
• Recent results and perspectives on cosmology and fundamental physics from microwave surveys
• Cosmological constraints on the decay of heavy relics into neutrinos
• Primordial gravitational waves: Model effects on time evolution and spectrum
• On the radiative and thermodynamic properties of the cosmic radiations using Cobe Firas instrumental data: Sunyaev-Zeldovich distortion effect
• Axion production and CMB spectral distortion in cosmological tangled magnetic field
• Cosmic microwave background spectral distortions from Rayleigh scattering at second order
• The Glow of Axion Quark Nugget Dark Matter: (IV) CMB Spectral and Anisotropy Signatures
• Systematic error cancellation for a four-port interferometric polarimeter
• Probing small-scale baryon and dark matter isocurvature perturbations with cosmic microwave background anisotropies