BaseEstimator

class BaseEstimator(circuits, observables, parameters=None)

Bases: abc.ABC

Estimator base class.

Base class for Estimator that estimates expectation values of quantum circuits and observables.

Creating an instance of an Estimator, or using one in a with context opens a session that holds resources until the instance is close() ed or the context is exited.

Parameters

• circuits – quantum circuits that represent quantum states
• observables – observables
• parameters – parameters of quantum circuits, specifying the order in which values
• be bound. (will) – Defaults to [circ.parameters for circ in circuits] The indexing is such that parameters[i, j] is the j-th formal parameter of circuits[i].

Raises

QiskitError – for mismatch of circuits and parameters list.

Methods

close

Attributes

circuits

observables

parameters