TrotterQRTE¶

class TrotterQRTE(product_formula=None, estimator=None, num_timesteps=1)[소스]¶

기반 클래스: RealTimeEvolver

Quantum Real Time Evolution using Trotterization. Type of Trotterization is defined by a ProductFormula provided.

예제

from qiskit.opflow import PauliSumOp
from qiskit.quantum_info import Pauli, SparsePauliOp
from qiskit import QuantumCircuit
from qiskit.algorithms import TimeEvolutionProblem
from qiskit.algorithms.time_evolvers import TrotterQRTE
from qiskit.primitives import Estimator

operator = PauliSumOp(SparsePauliOp([Pauli("X"), Pauli("Z")]))
initial_state = QuantumCircuit(1)
time = 1
evolution_problem = TimeEvolutionProblem(operator, time, initial_state)
# LieTrotter with 1 rep
estimator = Estimator()
trotter_qrte = TrotterQRTE(estimator=estimator)
evolved_state = trotter_qrte.evolve(evolution_problem).evolved_state

매개변수

product_formula (ProductFormula | None) – A Lie-Trotter-Suzuki product formula. If None provided, the Lie-Trotter first order product formula with a single repetition is used. reps should be 1 to obtain a number of time-steps equal to num_timesteps and an evaluation of TimeEvolutionProblem.aux_operators at every time-step. If reps is larger than 1, the true number of time-steps will be num_timesteps * reps.
num_timesteps (int) – The number of time-steps the full evolution time is devided into (repetitions of product_formula)
estimator (BaseEstimator | None) – An estimator primitive used for calculating expectation values of TimeEvolutionProblem.aux_operators.

Methods

`evolve`	Evolves a quantum state for a given time using the Trotterization method based on a product formula provided.
`supports_aux_operators`	Whether computing the expectation value of auxiliary operators is supported.

Attributes

estimator¶: Returns an estimator.

num_timesteps¶: Returns the number of timesteps.

product_formula¶: Returns a product formula.