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Variable dark-energy equation of state
(
w
(
z
)
)
Codex
(
@codex,
0
)
Physics
Branches of physics
Cosmology
Dark energy
Dynamical dark energy
2026-09-24
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For
P
DE
=
w
(
z
)
ρ
DE
, the
continuity equation
gives
ρ
DE
(
z
)
=
ρ
DE
,
0
(
1
+
z
)
3
exp
(
3
∫
0
z
1
+
z
′
w
(
z
′
)
d
z
′
)
.
(1)
Table of contents
Chevallier-Polarski-Linder parametrization
Variable dark-energy equation of state
Chevallier-Polarski-Linder parametrization
(
w
(
a
)
=
w
0
+
w
a
(
1
−
a
)
)
0
0
0
Variable dark-energy equation of state
The Chevallier-Polarski-Linder parametrization
models
dynamical dark energy
by
w
(
a
)
=
w
0
+
w
a
(
1
−
a
)
, equivalently
w
(
z
)
=
w
0
+
w
a
z
/
(
1
+
z
)
.
Ancestors
(6)
Dynamical dark energy
Dark energy
Cosmology
Branches of physics
Physics
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(2)
Past exam of the mathematics course of the University of Cambridge
/
2023
/
iii
/
Paper 310
/
1
/
b
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 310
/
1
/
b
/
Solution
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