Qiskit provider for accessing the quantum devices and simulators at IBMQ
Qiskit IBM Quantum Provider
Qiskit is an open-source SDK for working with quantum computers at the level of circuits, algorithms, and application modules.
This module contains a provider that allows accessing the IBM Quantum systems and simulators.
We encourage installing Qiskit via the PIP tool (a python package manager), which installs all Qiskit elements and components, including this one.
pip install qiskit
PIP will handle all dependencies automatically for us and you will always install the latest (and well-tested) version.
To install from source, follow the instructions in the contribution guidelines.
Setting up the IBM Quantum Provider
Once the package is installed, you can access the provider from Qiskit.
Note: Since November 2019 (and with version
qiskit-ibmq-providerpackage / version
qiskitpackage) legacy Quantum Experience or QConsole (v1) accounts are no longer supported. If you are still using a v1 account, please follow the steps described in update instructions to update your account.
Configure your IBM Quantum Experience credentials
Create an IBM Quantum Experience account or log in to your existing account by visiting the IBM Quantum Experience login page.
Copy (and/or optionally regenerate) your API token from your IBM Quantum Experience account page.
Take your token from step 2, here called
MY_API_TOKEN, and run:
from qiskit import IBMQ IBMQ.save_account('MY_API_TOKEN')
The command above stores your credentials locally in a configuration file called
qiskitrc. By default, this file is located in
$HOMEis your home directory. If you are still using
Qconfig.py, please delete that file and run the command above.
Accessing your IBM Quantum Experience backends
IBMQ.save_account(), your credentials will be stored on disk.
Once they are stored, at any point in the future you can load and use them
in your program simply via:
from qiskit import IBMQ provider = IBMQ.load_account() backend = provider.get_backend('ibmq_qasm_simulator')
Alternatively, if you do not want to save your credentials to disk and only intend to use them during the current session, you can use:
from qiskit import IBMQ provider = IBMQ.enable_account('MY_API_TOKEN') backend = provider.get_backend('ibmq_qasm_simulator')
By default, all IBM Quantum Experience accounts have access to the same, open project
main). For convenience, the
IBMQ.enable_account() methods will return a provider
for that project. If you have access to other projects, you can use:
provider_2 = IBMQ.get_provider(hub='MY_HUB', group='MY_GROUP', project='MY_PROJECT')
Updating to the new IBM Quantum Experience
Since November 2019 (and with version
0.4 of this
package), the IBM Quantum Provider only supports the new IBM Quantum Experience, dropping
support for the legacy Quantum Experience and Qconsole accounts. The new IBM Quantum
Experience is also referred as
v2, whereas the legacy one and Qconsole as
This section includes instructions for updating your accounts and programs. Please note that:
- the IBM Quantum Experience
v1credentials and the programs written for pre-0.3 versions will still be working during the
0.3.xseries. From 0.4 onwards, only
v2credentials are supported, and it is recommended to upgrade in order to take advantage of the new features.
- updating your credentials to the IBM Quantum Experience
v2implies that you will need to update your programs. The sections below contain instructions on how to perform the transition.
Updating your IBM Quantum Experience credentials
If you have credentials for the legacy Quantum Experience or Qconsole stored in
disk, you can make use of
IBMQ.update_account() helper. This helper will read
your current credentials stored in disk and attempt to convert them:
from qiskit import IBMQ IBMQ.update_account()
Found 2 credentials. The credentials stored will be replaced with a single entry with token "MYTOKEN" and the new IBM Quantum Experience v2 URL (https://auth.quantum-computing.ibm.com/api). In order to access the provider, please use the new "IBMQ.get_provider()" methods: provider0 = IBMQ.load_account() provider1 = IBMQ.get_provider(hub='A', group='B', project='C') Note you need to update your programs in order to retrieve backends from a specific provider directly: backends = provider0.backends() backend = provider0.get_backend('ibmq_qasm_simulator') Update the credentials? [y/N]
Upon confirmation, your credentials will be overwritten with a valid IBM Quantum
Experience v2 set of credentials. For more complex cases, consider deleting your
previous credentials via
IBMQ.delete_accounts() and follow the instructions
in the IBM Quantum Experience account page.
Updating your programs
The new IBM Quantum Experience support also introduces a more structured approach for accessing backends. Previously, access to all backends was centralized through:
0.3 onwards, the preferred way to access the backends is via a
Provider for one of your projects instead of via the global
directly, allowing for more granular control over
the project you are using:
my_provider = IBMQ.get_provider() my_provider.backends() my_provider.get_backend('ibmq_qasm_simulator')
In a similar spirit, you can check the providers that you have access to via:
In addition, since the new IBM Quantum Experience provides only one set of
credentials, the account management methods in IBMQ are now in singular form.
For example, you should use
IBMQ.load_account() instead of
IBMQAccountError exception is raised if you
attempt to use the legacy methods with an IBM Quantum Experience v2 account.
The following tables contains a quick reference for the differences between the two versions. Please refer to the documentation of each method for more in depth details:
|<0.3 / v1 credentials||>=0.3 and v2 credentials|
|<0.3 / v1 credentials||>=0.3 and v2 credentials|
If you'd like to contribute to IBM Quantum Provider, please take a look at our contribution guidelines. This project adheres to Qiskit's code of conduct. By participating, you are expect to uphold to this code.
We use GitHub issues for tracking requests and bugs. Please use our slack
for discussion and simple questions. To join our Slack community use the
invite link at Qiskit.org. For questions that are more suited for a forum we
Qiskit tag in Stack Exchange.
Now you're set up and ready to check out some of the other examples from our Qiskit Tutorial repository.
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