What question did this study set out to answer?

To develop a quantum-enhanced approach for detecting axion dark matter using advanced techniques.

March 3, 2026Open Access

Compound Quantum-Enhanced Spectroscopy Architecture for Broadband Axion Dark Matter Detection

Key Points

To develop a quantum-enhanced approach for detecting axion dark matter using advanced techniques.
Developed a compound quantum architecture combining three components: QPE, Grover's algorithm, and entangled networks.
Applied QPE for sub-SQL photon counting to increase sensitivity.
Utilized Grover amplitude amplification for accelerated tuning of parameters.
Employed multi-cavity networks to facilitate further scaling of the detection system.
Achieved a ~20× increase in sensitivity through quantum phase estimation.
Demonstrated ~212× speedup in search time across 180,000 tuning steps via Grover amplification.
Realized ~4,200× faster scan speed compared to classical ADMX setups.

Abstract

We propose a compound quantum architecture for broadband axion dark matter detection combining three independently validated components: quantum phase estimation (QPE) for sub-SQL photon counting (~20× per-step sensitivity), Grover amplitude amplification (~212× search speedup over 180,000 tuning steps), and entangled multi-cavity networks for further scaling. The single-cavity compound yields ~4,200× scan speed advantage over classical ADMX pipelines. All claims are supported by 10 executable companion scripts validated against published results. SSPE circuit: 32 qubits, 525 gates.

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