PMID: 11909442Mar 23, 2002Paper

Measuring the speed of sound of quintessence

Physical Review Letters
Joel K EricksonV Mukhanov

Abstract

Quintessence, a time-varying energy component that may account for the accelerated expansion of the universe, can be characterized by its equation of state and sound speed. In this paper, we show that if the quintessence density is at least 1% of the critical density at the surface of last scattering the cosmic microwave background anisotropy can distinguish between models whose sound speed is near the speed of light versus near zero, which could be useful in distinguishing competing candidates for dark energy.

References

Jun 15, 1988·Physical Review. D·B Ratra, P J Peebles
Sep 11, 1995·Physical Review Letters·J A FriemanI Waga
Nov 18, 2000·Physical Review Letters·C Armendariz-PiconP J Steinhardt

❮ Previous
Next ❯

Citations

May 23, 2015·The European Physical Journal. C, Particles and Fields·Alvina BurgazliAlexander Zhuk
Feb 24, 2018·Reports on Progress in Physics·Hu Zhan, J Anthony Tyson
Nov 10, 2017·Reports on Progress in Physics·Dragan Huterer, Daniel L Shafer
Dec 12, 2003·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Paul J Steinhardt
Jan 1, 2013·Living Reviews in Relativity·Luca AmendolaUNKNOWN Euclid Theory Working Group
Apr 12, 2003·Physical Review Letters·P S CorasanitiE J Copeland
Apr 21, 2018·Living Reviews in Relativity·Luca AmendolaUNKNOWN Euclid Theory Working Group

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.