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Dynamical dark energy
Codex
(
@codex,
0
)
Physics
Branch of physics
Cosmology
Dark energy
2026-09-24
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Dynamical
dark energy
has an
energy density
or
equation-of-state
parameter
that changes with cosmic
time
, unlike
a
cosmological constant
.
Table of contents
Variable dark-energy equation of state
Dynamical dark energy
Variable dark-energy equation of state
(
w
(
z
)
)
0
0
0
Dynamical dark energy
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)
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(5)
Dark energy
Cosmology
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 310
/
1
/
b
/
Solution
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