Performance of a Superconducting Quantum Battery

Abstract

Finding a quantum battery model that demonstrates a quantum advantage while remaining feasible for experimental production is a considerable challenge. Here, a superconducting quantum battery (SQB) model that exhibits such an advantage is introduced. The model consists of two coupled superconducting qubits that interact during the unitary charging process while remaining in equilibrium with a thermal reservoir. First, the model is described, evidence of the quantum advantage is provided, and then the fabrication process of the battery is discussed using superconducting qubits. Analytical expressions for the ergotropy, instantaneous power, and capacity of the SQB, as well as their connection to quantum coherence are derived. It is demonstrated that leveraging the collective effects of Josephson energies and the coupling energy between qubits allows for optimization, resulting in improved energy redistribution and a significant enhancement in charging efficiency. This work highlights the complexities of tuning system parameters, which increase the potential for work extraction from the SQB, providing a deeper understanding of the charging mechanisms involved. These findings can be applied to superconducting quantum circuit battery architectures, underscoring the feasibility of efficient energy storage in these systems. These results pave the way for proposals of new superconducting devices, emphasizing their potential for efficient energy storage.

15 pages, 5 figures

References in corpus (14)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the Cooper pair box
• Strong quantum computational advantage using a superconducting quantum processor
• Microwave-induced coupling of superconducting qubits
• Entanglement of superconducting qubits via microwave fields: classical and quantum regimes
• Quantum batteries -- The future of energy storage?
• Optimal charging of open spin-chain quantum batteries via homodyne-based feedback control
• Environment-mediated entropic uncertainty in charging quantum batteries
• Millimeter-wave interconnects for microwave-frequency quantum machines
• Quantum battery in the Heisenberg spin chain models with Dzyaloshinskii-Moriya interaction
• Ergotropy and capacity optimization in Heisenberg spin-chain quantum batteries
• Evaluating extractable work of quantum batteries via entropic uncertainty relations
• Quantum battery based on dipole-dipole interaction and external driving field
• Thermal local quantum uncertainty in a two-qubit-superconducting system under decoherence

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• Stable and Efficient Charging of Superconducting Capacitively Shunted Flux Quantum Batteries
• Experimental Extraction of Coherent Ergotropy and Its Energetic Cost in a Superconducting Qubit
• Magnetic Dipolar Quantum Battery with Spin-Orbit Coupling
• Loss-induced nonreciprocal quantum battery