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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

168,695 papers · 148 categories

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3 results for “4-qubit”

Four qubits generated by Clifford gatesquant-ph

The paper studies 4-qubit Clifford states and their properties.

problem Understanding the set and properties of 4-qubit Clifford states.

method Analyzing the 293760 4-qubit Clifford states, splitting them into 18 groups, and studying the action of CNOT gates and local gates.

result There are 293760 4-qubit Clifford states with specific entanglement entropies, and any pair can be connected with local gates and at most 3 CNOT gates.

Clifford states 4-qubit local gates CNOT gates entanglement entropy

2020-04-18abs ↗pdf ↗

Hybrid Quantum-Classical Ensemble Learning for S\&P 500 Directional Predictioncs.LG

Hybrid quantum-classical model boosts S&P 500 prediction accuracy to 60.14%.

problem Challenges in financial market prediction, especially high noise and non-stationarity.

method Combines quantum sentiment analysis, Decision Transformer, and model selection strategies.

result Achieved 60.14% directional accuracy on S&P 500, a 3.10% improvement.

quantum machine learning ensemble learning financial prediction Sentiment analysis Decision Transformer

2025-12-06abs ↗pdf ↗

Filtered Spectral Projection for Quantum Principal Component Analysisstat.ML

FSPA bypasses eigenvalue estimation for quantum PCA, achieving optimal complexity and robustness.

problem Quantum PCA eigenvalue estimation is computationally expensive and prone to errors.

method Filtered Spectral Projection Algorithm (FSPA) that projects onto the dominant spectral subspace directly.

result FSPA achieves optimal complexity and robustness, outperforming classical methods.

quantum PCA spectral projection optimal complexity robustness filtering

2026-03-13abs ↗pdf ↗