Imprints of microcausality violation on the cosmic microwave background

TL;DR

This paper investigates how violations of microcausality, modeled through a modified Heisenberg algebra, could influence the temperature anisotropies observed in the cosmic microwave background, offering potential observational signatures.

Contribution

It introduces a modified Heisenberg algebra to study microcausality violation effects on inflaton fluctuations and their impact on CMB anisotropies.

Findings

Microcausality violation can alter the temperature anisotropy spectrum.

Modified commutators lead to observable imprints in the CMB.

Theoretical predictions suggest potential signatures for future observations.

Abstract

We consider a modification of the Heisenberg algebra with the non-vanishing commutator of scalar field operators. We then identify the scalar field with the second quantized inflaton fluctuation and calculate effects of microcausality violation on the temperature anisotropy of cosmic microwave background radiation.