359 citations · 1.3k across the 20 of their papers we have counts for
20 papers
Local non-Gaussianities from cross-correlations between the CMB and 21-cm
Giorgio Orlando, Thomas Flöss, P. Daniel Meerburg +1
The 21-cm brightness temperature fluctuation from the Dark Ages () will allow us to probe the inflationary epoch on very small scales ($>0.1 \, \mbox{Mpc}^{-1}$),…
CMB-S4: Forecasting Constraints on Through -distortion Anisotropy
David Zegeye, Federico Bianchini, J. Richard Bond +14
Diffusion damping of the cosmic microwave background (CMB) power spectrum results from imperfect photon-baryon coupling in the pre-recombination plasma. At redshift $5 \times 10^4…
The reconstructed CMB lensing bispectrum
Alba Kalaja, Giorgio Orlando, Aleksandr Bowkis +3
Weak gravitational lensing by the intervening large-scale structure (LSS) of the Universe is the leading non-linear effect on the anisotropies of the cosmic microwave background (C…
Probing parity-odd bispectra with anisotropies of GW modes
Giorgio Orlando
It is well known that non-trivial squeezed tensor bispectra can lead to anisotropies in the inflationary stochastic gravitational wave (GW) background, providing us with an alterna…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Snowmass 2021 CMB-S4 White Paper
Kevork Abazajian, Arwa Abdulghafour, Graeme E. Addison +353
This Snowmass 2021 White Paper describes the Cosmic Microwave Background Stage 4 project CMB-S4, which is designed to cross critical thresholds in our understanding of the origin a…
Snowmass2021 Cosmic Frontier: Cosmic Microwave Background Measurements White Paper
Clarence L. Chang, Kevin M. Huffenberger, Bradford A. Benson +128
This is a solicited whitepaper for the Snowmass 2021 community planning exercise. The paper focuses on measurements and science with the Cosmic Microwave Background (CMB). The CMB…
The Simons Observatory: Constraining inflationary gravitational waves with multi-tracer B-mode delensing
Toshiya Namikawa, Anton Baleato Lizancos, Naomi Robertson +32
We introduce and validate a delensing framework for the Simons Observatory (SO), which will be used to improve constraints on inflationary gravitational waves (IGWs) by reducing th…
Testing the Early Universe with Anisotropies of the Gravitational Wave Background
Ema Dimastrogiovanni, Matteo Fasiello, Ameek Malhotra +2
In this work we analyse in detail the possibility of using small and intermediate-scale gravitational wave anisotropies to constrain the inflationary particle content. First, we de…
Primordial tensor bispectra in -CMB cross-correlations
Giorgio Orlando, P. Daniel Meerburg, Subodh P. Patil
Cross-correlations between Cosmic Microwave Background (CMB) temperature and polarization anisotropies and -spectral distortions have been considered to measure (squeezed) primo…
Bounds on warm dark matter from Schwarzschild primordial black holes
Jérémy Auffinger, Isabella Masina, Giorgio Orlando
We consider light dark matter candidates originated from the evaporation of Schwarzschild primordial black holes, with masses in the range g. These candidates are be…
Measuring Parity Violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network
Giorgio Orlando, Mauro Pieroni, Angelo Ricciardone
Parity violation is a powerful observable to distinguish a cosmological background of Gravitational Waves (GWs) from an astrophysical one. Planar single GW interferometers, both on…
Tensor non-Gaussianity in chiral scalar-tensor theories of gravity
Nicola Bartolo, Luca Caloni, Giorgio Orlando +1
Violation of parity symmetry in the gravitational sector, which manifests into unequal left and right circular polarization states of primordial gravitational waves, represents a w…
CMB modes from photon-photon forward scattering revisited
Ahmad Hoseinpour, Moslem Zarei, Giorgio Orlando +2
Recent literature has shown that photon-photon forward scattering mediated by Euler-Heisenberg interactions may generate some amount of the circular polarization ( modes) in the…
Primordial Gravitational Waves from Galaxy Intrinsic Alignments
Matteo Biagetti, Giorgio Orlando
Galaxy shapes have been observed to align with external tidal fields generated by the large-scale structures of the Universe. While the main source for these tidal fields is provid…
CMB circular and B-mode polarization from new interactions
Nicola Bartolo, Ahmad Hoseinpour, Sabino Matarrese +2
Standard models describing the radiation transfer of the cosmic microwave background (CMB) through Compton scattering predict that cosmological scalar perturbations at linear order…
Measuring chiral gravitational waves in Chern-Simons gravity with CMB bispectra
Nicola Bartolo, Giorgio Orlando, Maresuke Shiraishi
Chern-Simons gravity coupled to the scalar sector through a generic coupling function can be tested at the very high energies of the inflationary period. In 1706.04627, we c…
Photon-graviton scattering: A new way to detect anisotropic gravitational waves?
Nicola Bartolo, Ahmad Hoseinpour, Giorgio Orlando +2
Gravitons are the quantum counterparts of gravitational waves in low-energy theories of gravity. Using Feynman rules one can compute scattering amplitudes describing the interactio…
Parity breaking signatures from a Chern-Simons coupling during inflation: the case of non-Gaussian gravitational waves
Nicola Bartolo, Giorgio Orlando
Considering high-energy modifications of Einstein gravity during inflation is an interesting issue. We can constrain the strength of the new gravitational terms through observation…