qsengine 1.1.1 is outRead the release notes

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Each one is MIT licensed, tested against an independent reference and documented with real output. qsengine is the first of them.

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qsengine docs · Quantum physics

Entanglement

Two qubits are entangled when their joint state cannot be split into a state for each one. Measuring one then tells you about the other.

A Hadamard on qubit 0 and a CNOT from 0 to 1 give (|00⟩ + |11⟩)/√2, a Bell state. In qsengine it is two lines.

Each qubit on its own looks like a fair coin. Only the pair is special, because the two results always agree.

Running it 1000 times gives 513 of 00 and 487 of 11, and never 01 or 10.

Stable · version 1.1.1

qsengine, a quantum circuit simulator for Python

A Rust core runs your circuits on every CPU core or any GPU, up to 30 qubits, with docs that start at bra-ket notation.

Up to 30 qubits · CPU and any GPU · Python 3.9+ · MIT licence

More on qsengine Get started with qsengine Documentation Source PyPI

PYbell.py1000 shots

import qsengine

qc = qsengine.QuantumCircuit(2)
qc.h(0)
qc.cx(0, 1)

print(qc.run(shots=1000, seed=1))
# {'00': 513, '11': 487}

print(qc.probabilities())
# 0.5 for 00, 0.5 for 11

print(qc)
# q0: ──H──●──
#          │
# q1: ─────X──

Only 00 and 11 come up: the qubits always agree.

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qscommons · Joining

What a new tool needs

It is released under the MIT licence and installs with one command.

Its results are tested against an independent reference, the way qsengine checks every gate against NumPy.

Its documentation prints real output, and changes in the same pull request as the code.

Quantum tools maintained in public

qsengine, a quantum circuit simulator for Python

How a quantum tool joins in 2 steps

Propose the quantum tool

Meet the 4 standards