Gravitational waves: Classification, Methods of detection, Sensitivities, and Sources

TL;DR

This paper provides a comprehensive overview of gravitational waves, including their classification, detection methods, sensitivities, and sources, highlighting imminent direct detections and future sensitivity improvements across all frequency bands.

Contribution

It offers a complete classification of gravitational waves and summarizes current detection techniques, sensitivities, and sources, emphasizing the near-term prospects for direct detection.

Findings

Real-time detections possible above 300 pHz

Detection via GW imprints or indirectly below 300 pHz

Significant sensitivity improvements expected in the next century

Abstract

After giving a brief introduction and presenting a complete classification of gravitational waves (GWs) according to their frequencies, we review and summarize the detection methods, the sensitivities, and the sources. We notice that real-time detections are possible above 300 pHz. Below 300 pHz, the detections are possible on GW imprints or indirectly. We are on the verge of detection. The progress in this field will be promising and thriving. We will see improvement of a few orders to several orders of magnitude in the GW detection sensitivities over all frequency bands in the next hundred years.