# Qiskit IonQ Provider
<img src="https://ionq.com/images/ionq-logo-dark.png" alt="IonQ Logo" width="350px"/>
[](https://opensource.org/licenses/Apache-2.0)
**Qiskit** is an open-source SDK for working with quantum computers at the level of circuits, algorithms, and application modules.
This project contains a provider that allows access to **[IonQ]** ion trap quantum
systems.
The example python notebook (in `/example`) should help you understand basic usage.
## API Access
The IonQ Provider uses IonQ's REST API, and using the provider requires an API access token from IonQ. If you would like to use IonQ as a Qiskit provider, please visit <https://cloud.ionq.com/settings/keys> to generate an IonQ API key.
## Installation
You can install the provider using pip:
```bash
pip install qiskit-ionq
```
## Provider Setup
To instantiate the provider, make sure you have an access token then create a provider:
```python
from qiskit_ionq import IonQProvider
provider = IonQProvider("token")
```
### Credential Environment Variables
Alternatively, the IonQ Provider can discover your access token from environment variables:
```bash
export IONQ_API_TOKEN="token"
```
Then invoke instantiate the provider without any arguments:
```python
from qiskit_ionq import IonQProvider, ErrorMitigation
provider = IonQProvider()
```
Once the provider has been instantiated, it may be used to access supported backends:
```python
# Show all current supported backends:
print(provider.backends())
# Get IonQ's simulator backend:
simulator_backend = provider.get_backend("ionq_simulator")
```
### Submitting a Circuit
Once a backend has been specified, it may be used to submit circuits.
For example, running a Bell State:
```python
from qiskit import QuantumCircuit
# Create a basic Bell State circuit:
qc = QuantumCircuit(2, 2)
qc.h(0)
qc.cx(0, 1)
qc.measure([0, 1], [0, 1])
# Run the circuit on IonQ's platform with error mitigation:
job = simulator_backend.run(qc, error_mitigation=ErrorMitigation.DEBIASING)
# Print the results.
print(job.result().get_counts())
# Get results with a different aggregation method when debiasing
# is applied as an error mitigation strategy
print(job.result(sharpen=True).get_counts())
# The simulator specifically provides the the ideal probabilities and creates
# counts by sampling from these probabilities. The raw probabilities are also accessible:
print(job.result().get_probabilities())
```
### Basis gates and transpilation
The IonQ provider provides access to the full IonQ Cloud backend, which includes its own transpilation and compilation pipeline. As such, IonQ provider backends have a broad set of "basis gates" that they will accept — effectively anything the IonQ API will accept. The current supported gates can be found [on our docs site](https://docs.ionq.com/#tag/quantum_programs).
If you have circuits that you'd like to run on IonQ backends that use other gates than this (`u` or `iswap` for example), you will either need to manually rewrite the circuit to only use the above list, or use the Qiskit transpiler, per the example below. Please note that not all circuits can be automatically transpiled.
If you'd like lower-level access—the ability to program in native gates and skip our compilation/transpilation pipeline—please reach out to your IonQ contact for further information.
```python
from qiskit import QuantumCircuit, transpile
from math import pi
qc2 = QuantumCircuit(1, 1)
qc2.u(pi, pi/2, pi/4, 0)
qc2.measure(0,0)
transpiled_circuit = transpile(qc2, simulator_backend)
```
## Contributing
If you'd like to contribute to the IonQ Provider, please take a look at the [contribution guidelines](CONTRIBUTING.md). This project adheres the Qiskit Community code of conduct. By participating, you are agreeing to uphold this code.
If you have an enhancement request or bug report, we encourage you to open an issue in [this repo's issues tracker](https://github.com/qiskit-partners/qiskit-ionq/issues). If you have a support question or general discussion topic, we recommend instead asking on the [Qiskit community slack](https://qiskit.slack.com/) (you can join using [this link](https://ibm.co/joinqiskitslack)) or the [Quantum Computing StackExchange](https://quantumcomputing.stackexchange.com/questions/tagged/qiskit).
## Running Tests
This package uses the [pytest](https://docs.pytest.org/en/stable/) test runner, and other packages
for mocking interfactions, reporting coverage, etc.
These can be installed with `pip install -r requirements-test.txt`.
To use pytest directly, just run:
```bash
pytest [pytest-args]
```
Alternatively, you may use the setuptools integration by running tests through `setup.py`, e.g.:
```bash
python setup.py test --addopts="[pytest-args]"
```
### Fixtures
Global pytest fixtures for the test suite can be found in the top-level [test/conftest.py](./test/conftest.py) file.
## SSL certificate issues
If you receive the error `SSLError(SSLCertVerificationError)` or otherwise are unable to connect succesfully, there are a few possible resolutions:
1. Try accessing <https://api.ionq.co/v0.3/health> in your browser; if this does not load, you need to contact an IT administrator about allowing IonQ API access.
2. `pip install pip_system_certs` instructs python to use the same certificate roots of trust as your local browser - install this if the first step succeeded but qiskit-ionq continues to have issues.
3. You can debug further by running `res = requests.get('https://api.ionq.co/v0.3/health', timeout=30)` and inspecting `res`, you should receive a 200 response with the content `{"status": "pass"}`. If you see a corporate or ISP login page, you will need to contact a local IT administrator to debug further.
## Documentation
To build the API reference and quickstart docs, run:
```bash
pip install -r requirements-docs.txt
make html
open build/html/index.html
```
## License
[Apache License 2.0].
The IonQ logo and Q mark are copyright IonQ, Inc. All rights reserved.
[ionq]: https://www.ionq.com/
[apache license 2.0]: https://github.com/qiskit-partners/qiskit-ionq/blob/master/LICENSE.txt
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"description": "# Qiskit IonQ Provider\n\n<img src=\"https://ionq.com/images/ionq-logo-dark.png\" alt=\"IonQ Logo\" width=\"350px\"/>\n\n[](https://opensource.org/licenses/Apache-2.0)\n\n**Qiskit** is an open-source SDK for working with quantum computers at the level of circuits, algorithms, and application modules.\n\nThis project contains a provider that allows access to **[IonQ]** ion trap quantum\nsystems.\n\nThe example python notebook (in `/example`) should help you understand basic usage.\n\n## API Access\n\nThe IonQ Provider uses IonQ's REST API, and using the provider requires an API access token from IonQ. If you would like to use IonQ as a Qiskit provider, please visit <https://cloud.ionq.com/settings/keys> to generate an IonQ API key.\n\n## Installation\n\nYou can install the provider using pip:\n\n```bash\npip install qiskit-ionq\n```\n\n## Provider Setup\n\nTo instantiate the provider, make sure you have an access token then create a provider:\n\n```python\nfrom qiskit_ionq import IonQProvider\n\nprovider = IonQProvider(\"token\")\n```\n\n### Credential Environment Variables\n\nAlternatively, the IonQ Provider can discover your access token from environment variables:\n\n```bash\nexport IONQ_API_TOKEN=\"token\"\n```\n\nThen invoke instantiate the provider without any arguments:\n\n```python\nfrom qiskit_ionq import IonQProvider, ErrorMitigation\n\nprovider = IonQProvider()\n```\n\nOnce the provider has been instantiated, it may be used to access supported backends:\n\n```python\n# Show all current supported backends:\nprint(provider.backends())\n\n# Get IonQ's simulator backend:\nsimulator_backend = provider.get_backend(\"ionq_simulator\")\n```\n\n### Submitting a Circuit\n\nOnce a backend has been specified, it may be used to submit circuits.\nFor example, running a Bell State:\n\n```python\nfrom qiskit import QuantumCircuit\n\n# Create a basic Bell State circuit:\nqc = QuantumCircuit(2, 2)\nqc.h(0)\nqc.cx(0, 1)\nqc.measure([0, 1], [0, 1])\n\n# Run the circuit on IonQ's platform with error mitigation:\njob = simulator_backend.run(qc, error_mitigation=ErrorMitigation.DEBIASING)\n\n# Print the results.\nprint(job.result().get_counts())\n\n# Get results with a different aggregation method when debiasing\n# is applied as an error mitigation strategy\nprint(job.result(sharpen=True).get_counts())\n\n# The simulator specifically provides the the ideal probabilities and creates\n# counts by sampling from these probabilities. The raw probabilities are also accessible:\nprint(job.result().get_probabilities())\n```\n\n### Basis gates and transpilation\n\nThe IonQ provider provides access to the full IonQ Cloud backend, which includes its own transpilation and compilation pipeline. As such, IonQ provider backends have a broad set of \"basis gates\" that they will accept \u2014\u00a0effectively anything the IonQ API will accept. The current supported gates can be found [on our docs site](https://docs.ionq.com/#tag/quantum_programs).\n\nIf you have circuits that you'd like to run on IonQ backends that use other gates than this (`u` or `iswap` for example), you will either need to manually rewrite the circuit to only use the above list, or use the Qiskit transpiler, per the example below. Please note that not all circuits can be automatically transpiled.\n\nIf you'd like lower-level access\u2014the ability to program in native gates and skip our compilation/transpilation pipeline\u2014please reach out to your IonQ contact for further information.\n\n```python\nfrom qiskit import QuantumCircuit, transpile\nfrom math import pi\n\nqc2 = QuantumCircuit(1, 1)\nqc2.u(pi, pi/2, pi/4, 0)\nqc2.measure(0,0)\ntranspiled_circuit = transpile(qc2, simulator_backend)\n```\n\n## Contributing\n\nIf you'd like to contribute to the IonQ Provider, please take a look at the [contribution guidelines](CONTRIBUTING.md). This project adheres the Qiskit Community code of conduct. By participating, you are agreeing to uphold this code.\n\nIf you have an enhancement request or bug report, we encourage you to open an issue in [this repo's issues tracker](https://github.com/qiskit-partners/qiskit-ionq/issues). If you have a support question or general discussion topic, we recommend instead asking on the [Qiskit community slack](https://qiskit.slack.com/) (you can join using [this link](https://ibm.co/joinqiskitslack)) or the [Quantum Computing StackExchange](https://quantumcomputing.stackexchange.com/questions/tagged/qiskit).\n\n## Running Tests\n\nThis package uses the [pytest](https://docs.pytest.org/en/stable/) test runner, and other packages\nfor mocking interfactions, reporting coverage, etc.\nThese can be installed with `pip install -r requirements-test.txt`.\n\nTo use pytest directly, just run:\n\n```bash\npytest [pytest-args]\n```\n\nAlternatively, you may use the setuptools integration by running tests through `setup.py`, e.g.:\n\n```bash\npython setup.py test --addopts=\"[pytest-args]\"\n```\n\n### Fixtures\n\nGlobal pytest fixtures for the test suite can be found in the top-level [test/conftest.py](./test/conftest.py) file.\n\n## SSL certificate issues\n\nIf you receive the error `SSLError(SSLCertVerificationError)` or otherwise are unable to connect succesfully, there are a few possible resolutions:\n\n1. Try accessing <https://api.ionq.co/v0.3/health> in your browser; if this does not load, you need to contact an IT administrator about allowing IonQ API access.\n2. `pip install pip_system_certs` instructs python to use the same certificate roots of trust as your local browser - install this if the first step succeeded but qiskit-ionq continues to have issues.\n3. You can debug further by running `res = requests.get('https://api.ionq.co/v0.3/health', timeout=30)` and inspecting `res`, you should receive a 200 response with the content `{\"status\": \"pass\"}`. If you see a corporate or ISP login page, you will need to contact a local IT administrator to debug further.\n\n## Documentation\n\nTo build the API reference and quickstart docs, run:\n\n```bash\npip install -r requirements-docs.txt\nmake html\nopen build/html/index.html\n```\n\n## License\n\n[Apache License 2.0].\n\nThe IonQ logo and Q mark are copyright IonQ, Inc. All rights reserved.\n\n[ionq]: https://www.ionq.com/\n[apache license 2.0]: https://github.com/qiskit-partners/qiskit-ionq/blob/master/LICENSE.txt\n",
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