Transition¶
- class mrsimulator.transition.Transition(*, name: str = None, description: str = None, label: str = None, property_units: Dict = {}, initial: List[float] = [], final: List[float] = [])¶
Bases:
Parseable
Base Transition class describes a spin transition between two energy states, where the energy states are described using the weakly coupled basis.
(77)¶\[|m_{i,0}, m_{i,1}, ... m_{i,N} \rangle \rightarrow |m_{f,0}, m_{f,1}, ... m_{f,N} \rangle\]- Parameters:
initial (list) – The initial Zeeman energy state represented as a list of quantum numbers \(m_{i,n}\).
final (list) – The final Zeeman energy state represented as a list of quantum numbers \(m_{f,n}\).
Example
>>> from mrsimulator.transition import Transition >>> t1 = Transition(initial = [0.5, 0.5], final = [0.5, -0.5]) >>> t1 |0.5, -0.5⟩⟨0.5, 0.5|
- property D¶
Return a list of Δm**2 values of the spin transition for each site in a weakly coupled basis.
Example
>>> t1.D array([0., 0.])
- property P¶
Return a list of Δm values of the spin transition for each site in a weakly coupled basis.
Example
>>> t1.P array([ 0., -1.])
- property delta_m¶
An alias for p
- json(exclude={}, units=True) dict ¶
Parse the class object to a JSON compliant python dictionary object.
- Parameters:
exclude – Set of keys that will be excluded from the result.
units – If true, the attribute value is a physical quantity expressed as a string with a number and a unit, else a float.
Returns: dict
- property p¶
Return the total Δm (m_final-m_initial) value of the spin transition.
Example
>>> t1.p -1.0
- classmethod parse_dict_with_units(json_dict: dict)¶
Parse the physical quantity from a dictionary representation of the class object, where the physical quantity is expressed as a string with a number and a unit.
- Parameters:
json_dict (dict) – A required python dict object.
- reduced_dict(exclude={}) dict ¶
Returns a reduced dictionary representation of the class object by removing all key-value pair corresponding to keys listed in the exclude argument, and keys with value as None.
- Parameters:
exclude – A list of keys to exclude from the dictionary.
Return: A dict.
- tolist() list ¶
Convert the transition to a list of quantum numbers where the first N quantum numbers corresponds to the initial energy state, while the last N corresponds to the final energy state, where N is the number of sites.
Example
>>> t1.tolist() [0.5, 0.5, 0.5, -0.5]