TransitionPathway

class mrsimulator.transition.TransitionPathway(pathway: list = [], weight=1 + 0j)

Bases: TransitionList

Base TransitionPathway class is a list of connected Transitions.

Example

>>> from mrsimulator.transition import TransitionPathway, Transition
>>> t1 = Transition(initial = [0.5, 0.5], final = [0.5, -0.5])
>>> t2 = Transition(initial=[0.5, 0.5], final=[-0.5, 0.5])
>>> path = TransitionPathway([t1, t2])
>>> path
|0.5, -0.5⟩⟨0.5, 0.5| ⟶ |-0.5, 0.5⟩⟨0.5, 0.5|, weight=(1+0j)

append(item)

Append a list item

clear() → None -- remove all items from S

count(value) → integer -- return number of occurrences of value

extend(values)

S.extend(iterable) – extend sequence by appending elements from the iterable

filter(P=None, PP=None, D=None)

Filter a list of transitions to satisfy the filtering criterion.

Parameters:

• P (list) – A list of N (m_final - m_initial) values, where N is the total number of sites within the spin system.

• D (list) – A list of N (m_final^2 - m_initial^2) values, where N is the total number of sites within the spin system.

index(value[, start[, stop]]) → integer -- return first index of value.

Raises ValueError if the value is not present.

Supporting start and stop arguments is optional, but recommended.

insert(index, item)

Insert a list item

json(**kwargs) → dict

Parse the class object to a JSON compliant Python dictionary object.

Example

>>> pprint(path.json())
{'pathway': [{'final': [0.5, -0.5], 'initial': [0.5, 0.5]},
             {'final': [-0.5, 0.5], 'initial': [0.5, 0.5]}],
 'weight': (1+0j)}

pop([index]) → item -- remove and return item at index (default last).

Raise IndexError if list is empty or index is out of range.

remove(value)

S.remove(value) – remove first occurrence of value. Raise ValueError if the value is not present.

reverse()

S.reverse() – reverse IN PLACE

tolist()

Expand TransitionPathway to a Python list.

Example

>>> path.tolist()
[0.5, 0.5, 0.5, -0.5, 0.5, 0.5, -0.5, 0.5]

SymmetryPathway

class mrsimulator.transition.SymmetryPathway(*, channels: list = [], ch1: list = None, ch2: list = None, ch3: list = None)

Bases: BaseModel

Base SymmetryPathway class.

channels

The list of channels

Type:

list

ch1

The symmetry pathway for the channel at index 0.

Type:

list

ch2

The symmetry pathway for the channel at index 1.

Type:

list

ch3

The symmetry pathway for the channel at index 2.

Type:

list

total

The total symmetry pathway.