Dark Energy: a Brief Review

TL;DR

This paper provides a concise overview of dark energy, covering theoretical classifications and observational methods, including cosmic probes and constraints, to understand its nature and implications in cosmology.

Contribution

It offers a comprehensive summary of both theoretical frameworks and observational techniques related to dark energy, highlighting recent developments and research directions.

Findings

Classification of dark energy models into various theoretical types

Overview of observational probes and constraints used in dark energy research

Discussion of model-independent reconstruction methods

Abstract

The problem of dark energy is briefly reviewed in both theoretical and observational aspects. In the theoretical aspect, dark energy scenarios are classified into symmetry, anthropic principle, tuning mechanism, modified gravity, quantum cosmology, holographic principle, back-reaction and phenomenological types. In the observational aspect, we introduce cosmic probes, dark energy related projects, observational constraints on theoretical models and model independent reconstructions.