Rigetti Ankaa: Superconducting Quantum Computing at Scale on Open Quantum
Access Rigetti's 84-qubit Ankaa-3 superconducting processor with 99.5% gate fidelity and sub-100ns gate speeds through a unified cloud API.
Rigetti's Ankaa-3 is an 84-qubit superconducting quantum processor built on transmon qubits arranged in a square lattice topology with tunable couplers. It achieves a median two-qubit gate fidelity of 99.5% using native iSWAP gates that execute in just 72 nanoseconds, making it one of the fastest quantum processors in terms of raw gate speed. The tunable coupler architecture allows dynamic control over qubit-qubit coupling strength, enabling parametric compilation techniques that optimize circuit execution. The square lattice provides 4-fold nearest-neighbor connectivity, offering more routing options than linear or heavy-hex topologies and reducing SWAP overhead for circuits requiring non-adjacent qubit interactions. Ankaa-3 is designed for production quantum workloads and hybrid quantum-classical algorithms. Rigetti Ankaa-3 is available on Open Quantum through the same unified API used to access QPUs from IonQ, IQM, and AQT — with $50 in free compute credits every 90 days to start running circuits and comparing results across providers immediately.
About Rigetti Computing
Founded in 2013 by Chad Rigetti, a former IBM researcher, Rigetti Computing is a full-stack quantum computing company headquartered in Berkeley, California. The company designs, fabricates, and operates its own superconducting quantum processors in its dedicated Fab-1 fabrication facility, making it one of the few quantum companies with end-to-end vertical integration.
Rigetti developed the Quil (Quantum Instruction Language) programming language and the Forest SDK, an open-source developer suite that includes the pyQuil Python library, the Rigetti Quil Compiler, and the Quantum Virtual Machine. The Forest SDK provides fine-grained pulse-level control for researchers who need direct hardware access.
Publicly traded on NASDAQ under the ticker RGTI, Rigetti entered a $200M strategic partnership with Quanta Computer in 2025 to scale quantum processor production and establish co-located quantum-classical data centers.
Full-Stack Vertical Integration
Rigetti designs and fabricates its own QPUs in-house at Fab-1, maintaining control over the entire hardware stack from chip design to cloud delivery.
Modular Chiplet Architecture
The Cepheus-1-36Q demonstrated multi-chip QPU with interconnected 9-qubit chiplets, paving the way for scalable 100+ and 150+ qubit systems.
Multi-Cloud Availability
Rigetti hardware is available via Rigetti QCS, Amazon Braket, Microsoft Azure Quantum, and now Open Quantum.
Rigetti Hardware on Open Quantum
| System | Qubits | 2Q Gate Fidelity | Connectivity | Best For |
|---|---|---|---|---|
| Ankaa-3 | 84 | 99.5% median | Square lattice (4-fold nearest-neighbor) | Production workloads, hybrid algorithms |
Ultra-Fast Gate Times
Rigetti's native iSWAP gate executes in just 72 nanoseconds, making Ankaa-3 among the fastest quantum processors in raw gate speed. Fast gates mean more operations can be completed within the coherence window of the qubits, enabling deeper circuits and more complex algorithms. The tunable coupler architecture allows dynamic control over qubit-qubit coupling strength, enabling parametric compilation techniques that further optimize circuit execution.
Key Performance Highlights
- Median iSWAP gate time: 72 nanoseconds
- 99.5% median two-qubit gate fidelity across all qubit pairs
- Square lattice with 4-fold connectivity for efficient circuit mapping
- Tunable coupler architecture for efficient qubit-qubit coupling
Why Run Rigetti Circuits on Open Quantum?
Unified API
Access Rigetti, IonQ, AQT, and IQM hardware through a single SDK. No need to learn Quil or set up the Forest SDK.
No Vendor Lock-In
Write your circuit once in Qiskit or PennyLane and run it on any backend. Switch between vendors freely.
Cross-Vendor Benchmarking
Compare Rigetti superconducting results with IonQ and AQT trapped-ion results on the same circuit.
Free $50 Compute
Every new Open Quantum account includes $50 in free compute credits, refreshed every 90 days. Start running circuits on Rigetti immediately.
Getting Started
Submit your first circuit to Rigetti's Ankaa-3 in minutes. Install the Open Quantum SDK, authenticate, and select the Rigetti backend.
from openquantum_sdk.clients import SchedulerClient, JobSubmissionConfig
scheduler = SchedulerClient() # uses OPENQUANTUM_CLIENT_ID/SECRET env vars
config = JobSubmissionConfig(
backend_class_id="rigetti:ankaa-3",
name="Bell State on Rigetti",
shots=100,
)
job = scheduler.submit_job(config, file_path="bell_state.qasm")
result = scheduler.download_job_output(job)$50 Free Compute Credits
Every new Open Quantum account includes $50 in free compute credits, refreshed every 90 days. Run circuits on Rigetti, IonQ, AQT, and IQM hardware at no cost.