Published October 2011 | Version v1
Journal article Metadata-only

Restrictions on Purely Kinetic K-Essence

Creators

  • 1. College of Physical Science and Technology, Hebei University, Baoding 071002 (China)

Description

We restrict purely kinetic k-essence. Assuming that the equation of state is a power law of the kinetic energy, i.e. w = w0Xα, we find that α must be positive to obtain accelerated phases, constrained from the conditions for stability and causality. In this case the k-essence behaves like a phantom. We also study the evolutions of the equation of state and the speed of sound with numerical simulations. (geophysics, astronomy, and astrophysics)

Availability note (English)

Available from http://dx.doi.org/10.1088/0256-307X/28/10/109502

Additional details

Identifiers

DOI
10.1088/0256-307X/28/10/109502;

Publishing Information

Journal Title
Chinese Physics Letters
Journal Volume
28
Journal Issue
10
Journal Page Range
[3 p.]
ISSN
0256-307X
CODEN
CPLEEU

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
45004412
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ASTRONOMY; ASTROPHYSICS; CAUSALITY; COMPUTERIZED SIMULATION; EQUATIONS OF STATE; KINETIC ENERGY; PHANTOMS; SOUND WAVES; STABILITY; VELOCITY
Descriptors DEC
ENERGY; EQUATIONS; MOCKUP; PHYSICS; SIMULATION; STRUCTURAL MODELS