Selected Honorable Mention EssaysNo Access

Measuring the effects of loop quantum cosmology in the CMB data

Spyros Basilakos

Academy of Athens, Research Center for Astronomy and Applied Mathematics, Soranou Efesiou 4, Athens 11527, Greece

E-mail Address: svasil@academyofathens.gr

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Vahid Kamali

Department of Physics, Bu-Ali Sina University, Hamedan 65178, 016016, Iran

School of Physics, Institute for Research in Fundamental Sciences (IPM), 19538-33511, Tehran, Iran

E-mail Address: vkamali@basu.ac.ir

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, and

Ahmad Mehrabi

Department of Physics, Bu-Ali Sina University, Hamedan 65178, 016016, Iran

E-mail Address: Mehrabi@basu.ac.ir

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https://doi.org/10.1142/S0218271817430234Cited by:4 (Source: Crossref)

Abstract

In this paper we investigate the observational signatures of Loop Quantum Cosmology (LQC) in the CMB data. First, we concentrate on the dynamics of LQC and we provide the basic cosmological functions. We then obtain the power spectrum of scalar and tensor perturbations in order to study the performance of LQC against the latest CMB data. We find that LQC provides a robust prediction for the main slow-roll parameters, like the scalar spectral index and the tensor-to-scalar fluctuation ratio, which are in excellent agreement within $1 σ$ $1 σ$ with the values recently measured by the Planck collaboration. This result indicates that LQC can be seen as an alternative scenario with respect to that of standard inflation.

This essay received an Honorable Mention in the 2017 Essay Competition of the Gravity Research Foundation.

Keywords:

PACS: 98.80.Cq

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