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ift
NIFTy
Commits
d89d9c5d
Commit
d89d9c5d
authored
Jan 28, 2019
by
Philipp Frank
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docstrings lightcone
parent
1a9b8429
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32 additions
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5 deletions
+32
-5
nifty5/library/dynamic_operator.py
nifty5/library/dynamic_operator.py
+1
-1
nifty5/library/light_cone_operator.py
nifty5/library/light_cone_operator.py
+31
-4
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nifty5/library/dynamic_operator.py
View file @
d89d9c5d
...
...
@@ -217,7 +217,7 @@ def dynamic_lightcone_operator(*,
quant
,
causal
=
True
,
minimum_phase
=
False
):
'''Extends the functionality of :func
tion:
dynamic_operator to a Green's
'''Extends the functionality of :func
:`
dynamic_operator
`
to a Green's
function which is constrained to be within a light cone.
The resulting Green's function is constrained to be within a light cone.
...
...
nifty5/library/light_cone_operator.py
View file @
d89d9c5d
...
...
@@ -96,12 +96,39 @@ def _cone_arrays(c, domain, sigx, want_gradient):
class
LightConeOperator
(
Operator
):
'''
FIXME
'''Constructs a Light cone from a set of lightspeed parameters.
The resulting cone is defined as follows
.. math::
\\
exp
\\
left(-
\\
frac{1}{2}
\\
Re
\\
left(
\\
Delta
\\
right)^2
\\
right)
with
.. math::
\\
Delta =
\\
sqrt{-
\\
left(t^2 -
\\
frac{x^
\\
dagger C^{-1} x}
{
\\
sigma_x^2}
\\
right)}
where t and x are the coordinates of the target space. Note that axis zero
of the space is interpreted as the time axis. C denotes the input
paramters of the operator and parametrizes the shape of the cone.
sigx is the width of the asymptotic Gaussian in x necessary for
discretization.
Parameters
----------
domain : Domain, tuple of Domain or DomainTuple
The domain of the input parameters of the light cone, the values of the
lightspeed tensor.
target : Domain, tuple of Domain or DomainTuple
Output space on which the lightcone should be defined. The zeroth axis
of this space is interpreted as the time axis.
sigx : float
Width of the Gaussian for the discretized representation of the cone.
'''
def
__init__
(
self
,
domain
,
target
,
sigx
):
self
.
_domain
=
domain
self
.
_target
=
target
self
.
_domain
=
DomainTuple
.
make
(
domain
)
self
.
_target
=
DomainTuple
.
make
(
target
)
self
.
_sigx
=
sigx
def
apply
(
self
,
x
):
...
...
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