In Qiskit 1.2, Sampler and Estimator objects are getting phased out. When trying to replace them with the newest StatevectorSampler and StatevectorEstimator, StatevectorSampler cause no issues but the transition to StatevectorEstimator is not seamless.

I’m working through a Qiskit tutorial on Grover search. Unfortunately it was published in 2023 and the tutorial’s version of Qiskit (earlier than v1.00) is now out of date. I tried to rewrite the code in section “More Than One Marked Element” using Qiskit v1.0.2 with some success:

Closed 4 days ago.

In Qiskit, there are several methods to execute a quantum circuit and get measurement results in a local environment, including simulators (such as AerSimulator, QasmSimulator, Statevector, and fake series), samplers, and estimators.

I’m new to quantum computing and am currently working on building a quantum multiplication calculator. I’ve installed all the necessary packages, but I’m still encountering an ImportError. Here are the details:

The layout_method=”trivial” which is one of the parameter for the pass manager is always providing a errored result even on statevector simulator.

IBMNotAuthorizedError: ‘401 Client Error: Unauthorized for url: https://auth.quantum-computing.ibm.com/api/users/loginWithToken. Login failed., Error code: 3446.’

I followed the https://qiskit-community.github.io/qiskit-finance/tutorials/01_portfolio_optimization.html to solve the portfolio optimization problem with Qiskit Finance. However I can’t figure out, how to specify the real quantum backend from the IBM Quantum Platform. I tried to specify the backend like this but it doesn’t work. Anyone an idea?

Design a quantum circuit with 4 input bits ????0,????1,????2,????3 such that it “marks” the amplitudes corresponding to the states ||????0????1????2????3⟩∈{||0011⟩,||1100⟩,||0101⟩}

Given this code: