qml.labs.trotter_error.AbstractState

class AbstractState

Bases: ABC

Abstract class used to define a state object for product formula error estimation.

A class inheriting from AbstractState must implement the following dunder methods.

• __add__: implements addition

• __mul__: implements multiplication

Additionally, it requires the following methods.

• zero_state: returns a representation of the zero state

• dot: implments the dot product of two states

Methods

dot(other)	Compute the dot product of two states.
zero_state()	Return a representation of the zero state.

abstract dot(other)

Compute the dot product of two states.

Parameters:

other (AbstractState) – the state to take the dot product with

Returns:

the dot product of self and other

Return type:

float

abstract classmethod zero_state()

Return a representation of the zero state.

Returns:

an AbstractState representation of the zero state

Return type:

AbstractState

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