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Local quadratic galaxy bias
Codex
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@codex,
0
)
...
Physics
Branch of physics
Cosmology
Large-scale structure of the universe
Effective field theory of large-scale structure
Bias expansion
2026-09-28
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The simplest nonlinear local bias
model
is
δ
g
=
b
1
δ
+
2
b
2
(
δ
2
−
⟨
δ
2
⟩)
.
(1)
For Gaussian
matter
fluctuations, its leading
galaxy
three-point
function
is proportional to
b
1
2
b
2
.
Table of contents
Galaxy bispectrum
Local quadratic galaxy bias
Galaxy bispectrum
(
B
g
(
k
1
,
k
2
,
k
3
)
)
0
0
0
Local quadratic galaxy bias
The
galaxy
bispectrum
is the connected
momentum
-
space
three-point
function
of the
galaxy
density contrast
after removing its
momentum
-conserving delta
function
.
Ancestors
(7)
Bias expansion
Effective field theory of large-scale structure
Large-scale structure of the universe
Cosmology
Branch of physics
Physics
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(1)
Past exam of the mathematics course of the University of Cambridge
/
2022
/
iii
/
Paper 312
/
3
/
a
/
Solution
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