Quantum4J brings quantum programming to Java with a full Quantum Software Engineering stack — circuits, simulators, compiler passes, QASM support, and enterprise-grade extensibility.

A micro-optimized, high-performance NISQ Statevector Quantum Simulator using JAX XLA Kernel Fusion.

Schrödinger-like simulator of quantum computers

QAE (Quantum Amplitude Estimation, BHMT kanonski Brassard-Høyer-Mosca-Tapp). Grover. QFT. QPE. Statevector.

GPU-accelerated quantum circuit simulator with REST API. "Local", zero cloud-vendor lock-in.

Quantum Perceptron/KWS. Standardni Grover. Oracle. Egzaktni Statevector.

QSAN - Quantum Self-Attention Network (SWAP-test). Amplitude encoding. Egzaktni Statevector.

Statevector. Born verovatnoće. Entropija.

Statevector QC Simulator built in Rust

Grover/Amplitude Amplification. Kanonski Grover. Egzaktni Statevector.

QAM — Quantum Associative Memory (Ventura-Martinez). Amplitude amplification. Egzaktan Statevector.

Quantum Reservoir Computing (QRC). Hamiltonijan. PauliEvolutionGate. Statevector. Kanonski Trotter-Suzuki.

Quantum Autoregressive Language Model (QARLM — Quantum Autoregressive LM). Autoregresivno generisanje. Egzaktni Statevector. Amplitude encoding. Uslovni decoder PQC. Autoregressive inference.

Quantum Multi-Head Transformer (Multi-Head QSAN + kvantni FFN). SWAP test. Egzaktni Statevector. Kvantni FFN.

Parametrizovano kvantno kolo sa deterministički preuzetim parametrima. Egzaktan Statevector. PQC.

QLEMU is a virtual representation of quantum computers, providing a basic software implementation of qubits, quantum gates, and logic for testing qantum algorithms.

ZZFeatureMap (encoder) + RealAmplitudes (ansatz). Egzaktni simulator (Statevector). Deterministička grid-optimizacija hiperparametara.

Neutral cross-backend benchmarking for quantum circuit simulators. Found a silent Rz convention bug that breaks QAOA fidelity to zero.