The superposition principle is the cornerstone of quantum mechanics, leading to a variety of
genuinely quantum effects. Whether the principle applies also to macroscopic systems or …

We consider two interacting systems when one is treated classically while the other system
remains quantum. Consistent dynamics of this coupling has been shown to exist, and …

Spectral features in the CMB energy spectrum contain a wealth of information about the
physical processes in the early Universe, z≲ 2× 106. The CMB spectral distortions are …

Abstract PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to
ESA in May 2013 as a large-class mission for investigating within the framework of the ESA …

We investigate the quantumness of primordial cosmological fluctuations and its detectability.
The quantum discord of inflationary perturbations is calculated for an arbitrary splitting of the …

According to cosmological inflation, the inhomogeneities in our Universe are of quantum-
mechanical origin. This scenario is phenomenologically very appealing as it solves the …

Departures of the cosmic microwave background (CMB) frequency spectrum from a
blackbody–commonly referred to as spectral distortions–encode information about the …

A bstract Consistent coupling of quantum and classical degrees of freedom exists so long as
there is both diffusion of the classical degrees of freedom and decoherence of the quantum …

Deviations of the cosmic microwave background (CMB) frequency spectrum from a pure
blackbody tell an exciting story about the thermal history of our Universe. In this paper, we …

The dam** of primordial perturbations at small scales gives rise to distortions of the
cosmic microwave background (CMB). Here, the dependence of the distortion on the …