{"paper":{"title":"Quantum battery optimized by parametric amplification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Two-photon parametric driving exponentially strengthens cavity-qubit coupling in a superconducting circuit, producing entangled states that speed energy transfer into a quantum battery while suppressing decoherence.","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Fang-Mei Yang, Fu-Quan Dou, Jun-Hong An","submitted_at":"2026-05-14T08:53:56Z","abstract_excerpt":"The parametric amplification enabled by two-photon driving constitutes a versatile platform for advanced quantum technologies. We present an optimized scheme for implementing quantum batteries (QBs) based on a superconducting circuit system, where a two-photon-driven LC resonator serves as the charger and an array of transmon qubits functions as the battery. Our results show that two-photon parametric driving exponentially enhances the effective cavity-qubit coupling, which in turn gives rise to near-degenerate energy-level structures and highly entangled quantum states. This significantly enh"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"two-photon parametric driving exponentially enhances the effective cavity-qubit coupling, which in turn gives rise to near-degenerate energy-level structures and highly entangled quantum states. This significantly enhances the charging power and enables rapid energy transfer from the charger to the battery.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the two-photon driving term can be realized in the superconducting circuit without introducing uncontrolled higher-order nonlinearities or excess noise that would invalidate the exponential enhancement and decoherence suppression claims.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Two-photon parametric amplification in a superconducting circuit exponentially strengthens cavity-qubit coupling, enabling faster charging and decoherence-resistant energy storage in a quantum battery.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Two-photon parametric driving exponentially strengthens cavity-qubit coupling in a superconducting circuit, producing entangled states that speed energy transfer into a quantum battery while suppressing decoherence.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6691150bf60757928d43977fa7a098110c2219915e0f3af6f0d2c047b94e4498"},"source":{"id":"2605.14582","kind":"arxiv","version":1},"verdict":{"id":"d9fbe61a-b2d1-4b34-b9a5-76c277ac2da0","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T01:29:35.349351Z","strongest_claim":"two-photon parametric driving exponentially enhances the effective cavity-qubit coupling, which in turn gives rise to near-degenerate energy-level structures and highly entangled quantum states. This significantly enhances the charging power and enables rapid energy transfer from the charger to the battery.","one_line_summary":"Two-photon parametric amplification in a superconducting circuit exponentially strengthens cavity-qubit coupling, enabling faster charging and decoherence-resistant energy storage in a quantum battery.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the two-photon driving term can be realized in the superconducting circuit without introducing uncontrolled higher-order nonlinearities or excess noise that would invalidate the exponential enhancement and decoherence suppression claims.","pith_extraction_headline":"Two-photon parametric driving exponentially strengthens cavity-qubit coupling in a superconducting circuit, producing entangled states that speed energy transfer into a quantum battery while suppressing decoherence."},"references":{"count":103,"sample":[{"doi":"","year":null,"title":"The Hamiltonian becomesH= eδc p2 a +x 2 a /2+δ q p2 c +x 2 c /2+2g exaxc. To analyze the stability of the system, the system is cast in matrix form H= 1 2 pa pc eδc 0 0δ q pa pc + 1 2 xa xc eδc 2ge 2g","work_id":"fec5b1f4-6f9f-4c89-b20d-f422cd3dafaf","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2013,"title":"R. Alicki and M. Fannes, Entanglement boost for ex- tractable work from ensembles of quantum batteries, Phys. Rev. E87, 042123 (2013)","work_id":"0e337c7d-3032-478e-a2cf-ebb86bbae555","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"F. Campaioli, S. Gherardini, J. Q. Quach, M. Polini, and G. M. Andolina, Colloquium: Quantum batteries, Rev. Mod. Phys.96, 031001 (2024)","work_id":"3bfe0745-93d9-4e74-8585-19df221105ef","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2026,"title":"D. Ferraro, F. Cavaliere, M. G. Genoni, G. Benenti, and M. Sassetti, Opportunities and challenges of quantum batteries, Nat. Rev. Phys.8, 115 (2026)","work_id":"3a5ae5b4-6530-475e-9534-f3aa4da3b811","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2019,"title":"G. M. Andolina, M. Keck, A. Mari, V. Giovannetti, and M. Polini, Quantum versus classical many-body batter- ies, Phys. Rev. B99, 205437 (2019)","work_id":"e2babce1-5e80-4ef1-9560-cdd20c885b47","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":103,"snapshot_sha256":"bb78733e7b2f774b858c443a75f2ff9192a91e22ec43068fbd6d95ca8680435a","internal_anchors":0},"formal_canon":{"evidence_count":1,"snapshot_sha256":"e138ce2fd92f124c04457fc9a4f4734887a39b21821d2b616ab7062fbacfd645"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}