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Updated: May 27, 2025
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
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Classical-driving-assisted qubit-array quantum battery.
Zai-Kun Wang1, Kai Xu2, Zhen-Dong Wei1
1Qufu Normal University, Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu 273165, China.
Physical Review. E
|February 20, 2025
Summary
Optimizing quantum batteries involves minimizing qubit interactions and increasing qubit count. A novel protocol allows charging even with limited initial charger energy, challenging conventional ground-state preparation methods.
Area of Science:
- Quantum Information Science
- Quantum Thermodynamics
- Condensed Matter Physics
Background:
- Quantum batteries leverage quantum phenomena for efficient energy storage and transfer.
- Previous studies often assume specific boundary conditions and initial states for optimal performance.
Purpose of the Study:
- To investigate charging and discharging dynamics in a one-dimensional coupled qubit-array quantum battery model.
- To identify key parameters for optimizing quantum battery performance, including interactions, qubit number, and external fields.
- To explore novel charging protocols that challenge conventional assumptions.
Main Methods:
- Modeling a one-dimensional coupled qubit-array quantum battery under Born-Karman boundary conditions.
- Analysis of charging power, stored energy, and ergotropy as performance indicators.
- Application of a classical driving field to optimize energy transfer and storage.
Main Results:
- Minimizing hopping interaction between qubits and increasing the number of qubits enhance battery performance.
- A classical driving field significantly optimizes quantum battery performance.
- A new protocol enables charging even when the charger's initial energy is less than the battery's energy.
- Preparing the battery in its ground state is not always optimal; initial energy can enhance storage with a strong driving field.
Conclusions:
- Quantum battery performance is highly sensitive to qubit interactions and array size.
- Classical driving fields offer a powerful tool for enhancing quantum battery efficiency and flexibility.
- The developed protocol offers a more robust and versatile approach to quantum energy storage, overcoming limitations of previous methods.
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