These results show that the smaller the state parameter of quintessence is, the harder it is for the plasma to thermalize. Its kinetic energy depends on the rate of oscillations in the field strength; its potential energy depends on the interaction of the field with matter. (1999) partly solves the cosmological constant problem. Each square carries a letter. The more kinetic energy, the more positive the pressure - which isn't so likely for a universe-long wavelength. Holographic Dark Energy models compared to Cosmological Constant models, imply a high degeneracy. Then, knowing the redshift, they can calculate how fast the supernovae are moving away from us. This page was last modified on 1 December 2015, at 06:35. Quintessence, some cosmologists say, is an exotic kind of energy field that pushes particles away from each other, overpowering gravity and the other fundamental forces. Most English definitions are provided by WordNet . [4] In these models, the quintessence field has a density which closely tracks (but is less than) the radiation density until matter-radiation equality, which triggers quintessence to start having characteristics similar to dark energy, eventually dominating the universe. Tips: browse the semantic fields (see From ideas to words) in two languages to learn more. There had to be periods when the force was negligible, otherwise stars and planets and chipmunks never would have formed. [2] In these models, the quintessence field has a density which closely tracks (but is less than) the radiation density until matter-radiation equality, which triggers quintessence to start having characteristics similar to dark energy, eventually dominating the universe. By contrast, a Cosmological Constant is static, with a fixed energy density and wq = −1. [2] It has been proposed by some physicists to be a fifth fundamental force. | Many models of quintessence have a tracker behavior, which according to Paul Steinhardt et al. Examples of quintessence in a Sentence "; "Cosmological Imprint of an Energy Component with General Equation-of-State", http://www.astronomytoday.com/cosmology/quintessence.html, "Holographic Dark Energy with Cosmological Constant", "Holographic thermalization and gravitational collapse in the spacetime dominated by quintessence dark energy", Quintessence: The Search for Missing Mass in the Universe, https://infogalactic.com/w/index.php?title=Quintessence_(physics)&oldid=26003, Articles needing expert attention from April 2009, Physics articles needing expert attention, Creative Commons Attribution-ShareAlike License, About Infogalactic: the planetary knowledge core.
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