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Einstein Telescope (ET) is conceived to be a third generation gravitational-wave observatory. Its amplitude sensitivity would be a factor ten better than advanced LIGO and Virgo and it could also extend the low-frequency sensitivity down to…

Proposed space-based gravitational-wave (GW) detectors such as DECIGO and BBO will detect ~10^6 neutron-star (NS) binaries and determine the luminosity distances to the binaries with high precision. Combining the luminosity distances with…

Cosmology and Nongalactic Astrophysics · Physics 2012-02-27 Atsushi Nishizawa , Kent Yagi , Atsushi Taruya , Takahiro Tanaka

We reanalyze the detection possibilities for gravitational waves arising from cosmological first order phase transitions. We discuss the stochastic gravitational wave background corresponding to the three expected scenarios of phase…

Instrumentation and Methods for Astrophysics · Physics 2018-11-30 Margot Fitz Axen , Sharan Banagiri , Andrew Matas , Chiara Caprini , Vuk Mandic

The theory of general relativity (GR) predicts the existence of gravitational waves (GWs) with two tensor modes, while alternative theories propose up to six polarization modes. In this study, we investigate constraints on GW polarization…

General Relativity and Quantum Cosmology · Physics 2024-10-28 Jie Wu , Jin Li

In General Relativity, there are only two polarizations for gravitational waves. However, up to six polarizations are possible in a generic metric theory of gravity. Therefore, measuring the polarization content of gravitational waves…

General Relativity and Quantum Cosmology · Physics 2024-04-12 Jierui Hu , Dicong Liang , Lijing Shao

It is currently unknown how matter behaves at the extreme densities found within the cores of neutron stars. Measurements of the neutron star equation of state probe nuclear physics that is otherwise inaccessible in a laboratory setting.…

High Energy Astrophysical Phenomena · Physics 2026-03-03 Kris Walker , Rory Smith , Eric Thrane , Daniel J. Reardon

The Einstein Telescope is a conceived third generation gravitational-wave detector that is envisioned to be an order of magnitude more sensitive than advanced LIGO, Virgo and Kagra, which would be able to detect gravitational-wave signals…

General Relativity and Quantum Cosmology · Physics 2016-01-20 Duncan Meacher , Kipp Cannon , Chad Hanna , Tania Regimbau , B. S. Sathyaprakash

The past four years have seen a scientific revolution through the birth of a new field: gravitational-wave astronomy. The first detection of gravitational waves---recognised by the 2017 Nobel Prize in Physics---provided unprecedented tests…

Space-based gravitational wave (GW) detectors will open the millihertz band to survey ultra-compact binaries (UCBs). \textit{Verification binaries} (VBs) is a key to verifying the performance of space-based GW detectors because its…

General Relativity and Quantum Cosmology · Physics 2026-03-03 Zi-Heng Yu , Sen Yang , Liangliang Ren , Shun-Jia Huang

Planning for the development of a 3rd generation global gravitational-wave detector array is a multifaceted and complex effort that will necessarily need a high level of community input. Interfacing to extant and new stakeholders in the…

We investigate the prospects for detecting a parity-violating gravitational-wave background (GWB) with third-generation ground-based detector networks. We focus on a network consisting of one Einstein Telescope (ET) and two Cosmic Explorer…

General Relativity and Quantum Cosmology · Physics 2026-02-26 Hannah Duval , Charles Badger , Mairi Sakellariadou

Our knowledge and understanding of the Universe is mainly based on observations of the electromagnetic radiation in a wide range of wavelengths. Only during the past two decades, new kinds of detectors have been developed, exploiting other…

High Energy Astrophysical Phenomena · Physics 2019-06-11 Maurizio Spurio

Standard siren cosmology of gravitational wave (GW) merger events relies on the identification of host galaxies and their redshifts. But this can be highly challenging due to numerous candidates of galaxies in the GW localization area. We…

Cosmology and Nongalactic Astrophysics · Physics 2020-07-15 Hai Yu , Pengjie Zhang , Fa-Yin Wang

An interstellar communication network benefits from relay nodes placed in the gravitational lenses of stars. The signal gains are of order $10^{9}$ with optimal alignment, allowing for GBits connections at kW power levels with meter-sized…

Instrumentation and Methods for Astrophysics · Physics 2021-04-21 Michael Hippke

Space-based gravitational-wave (GW) detectors, including LISA, Taiji and TianQin, are able to detect mHz GW signals produced by mergers of supermassive black hole binaries, which opens a new window for GW astronomy. In this article, we…

General Relativity and Quantum Cosmology · Physics 2021-04-05 Qian Hu , Mingzheng Li , Rui Niu , Wen Zhao

An observation of gravitational waves is a trigger of the multi-messenger search of an astronomical event. A combination of the data from two or three gravitational wave telescopes indicates the location of a source and low-latency data…

General Relativity and Quantum Cosmology · Physics 2022-06-08 Seiya Sasaoka , Hirotaka Takahashi , Yilun Hou , Kentaro Somiya

Third generation gravitational wave (GW) detectors are expected to detect millions of binary black hole (BBH) mergers during their operation period. A small fraction of them ($\sim 1\%$) will be strongly lensed by intervening galaxies and…

Cosmology and Nongalactic Astrophysics · Physics 2023-08-17 Souvik Jana , Shasvath J. Kapadia , Tejaswi Venumadhav , Parameswaran Ajith

Einstein's General Theory of Relativity predicts that accelerating mass distributions produce gravitational radiation, analogous to electromagnetic radiation from accelerating charges. These gravitational waves have not been directly…

Quantum Physics · Physics 2024-11-13 Roman Schnabel , Nergis Mavalvala , David E. McClelland , Ping Koy Lam

In the third-generation (3G) gravitational-wave (GW) detector era, GW multi-messenger observations for binary neutron star merger events can exert great impacts on exploring the cosmic expansion history. Extending the previous work, we…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-09 Tao Han , Jing-Fei Zhang , Xin Zhang

The Einstein Telescope is a proposed third generation gravitational wave detector that will operate in the region of 1 Hz to a few kHz. As well as the inspiral of compact binaries composed of neutron stars or black holes, the lower…

General Relativity and Quantum Cosmology · Physics 2011-01-28 Leone Bosi , Edward K. Porter