---
id: amazon-braket-default-simulator
version: "1.40.0"
license: Apache License 2.0
license_treatment: permissive
maintenance: active
---

# amazon-braket-default-simulator — An open source quantum program simulator to be run locally with the Amazon Braket SDK

License: permissive · Maintenance: active · Downloads: 160.3K/mo

## What it is and what it does

Amazon Braket Default Simulator is a local quantum circuit simulator that integrates with the Amazon Braket SDK. It implements two simulation backends—StateVectorSimulator and DensityMatrixSimulator—that you can use to test and debug quantum circuits before submitting them to the Amazon Braket cloud service. The simulator accepts quantum circuits defined using the Braket SDK and returns measurement results, allowing rapid iteration on quantum algorithm development without incurring cloud execution costs.

The package depends on numerical libraries (numba, numpy, scipy, sympy) and opt_einsum for efficient tensor operations. It is actively maintained, supports current Python versions (3.11, 3.12, 3.13), and carries no known security vulnerabilities. Installation is straightforward via pip, though you must have the Amazon Braket SDK installed separately to use it.

Use it for:

- Test quantum circuits locally before submitting expensive cloud jobs to Amazon Braket.
- Debug quantum algorithms by inspecting measurement outcomes and state evolution.
- Prototype and validate quantum programs in development environments without cloud dependencies.
- Compare simulation results between state-vector and density-matrix backends for algorithm validation.
- Integrate quantum simulation into CI/CD pipelines for automated quantum software testing.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides a local quantum circuit simulator for testing quantum programs before submitting them to Amazon Braket, supporting state-vector and density-matrix simulation backends.

Yes, if you are developing quantum programs with Amazon Braket. The simulator is actively maintained, has no known vulnerabilities, and provides essential local testing before cloud submission. Install it alongside the Amazon Braket SDK as part of your quantum development workflow. Not relevant for non-Braket quantum work.

## Install

pip install amazon-braket-default-simulator
uv add amazon-braket-default-simulator
poetry add amazon-braket-default-simulator

## Installing amazon-braket-default-simulator

Before you install: Low friction installation with a pure-Python wheel. Actively maintained as of 2026-08-14 with no known vulnerabilities. Requires 8 runtime dependencies including numba, numpy, scipy, and sympy for numerical computation.

License in practice: Licensed under Apache License 2.0 (permissive), allowing free use, modification, and distribution with minimal restrictions—suitable for both open-source and commercial projects.

Quickstart:

pip install amazon-braket-default-simulator

from braket.circuits import Circuit
from braket.devices import LocalSimulator

device = LocalSimulator()
bell = Circuit().h(0).cnot(0, 1)
print(device.run(bell, shots=100).result().measurement_counts)

Requires Amazon Braket SDK to be installed separately; requires Python >= 3.11.

Verify before relying:

- Performance characteristics and simulation limits (maximum qubit count, circuit depth) not specified in fact sheet.
- Whether StateVectorSimulator and DensityMatrixSimulator have different accuracy or speed tradeoffs.

## Package facts

- License: Apache License 2.0 (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 160.3K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

quantum circuit simulator local, amazon braket simulator, quantum program testing, state vector simulator, density matrix simulator, quantum circuit emulation, braket local simulator, quantum-computing, simulation, aws-braket

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