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Achieving Identical Stored Energy in Cascaded Collisional Quantum Battery Charging: Analytical Result

  • Longyan Gong
  • Jing Zhang
  • Yongtao Li
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Abstract

Charging uniformity across distinct trials is an essential requirement for reliable quantum batteries. Nevertheless, intrinsic quantum stochasticity poses a fundamental challenge to this goal. This work investigates a two-qubit quantum battery within the framework of cascaded collision models. We propose an adaptive measurement on the charger after each collision, yielding two conditional battery states of equal expected stored energy. For chargers prepared in the excited state, we analytically prove that complete suppression of trajectory-dependent stored-energy fluctuations is attainable; for chargers prepared in general superposition states, our theory reveals that full suppression is fundamentally prohibited owing to battery-phase-dependent recursive dynamics. Numerical simulations are in excellent quantitative agreement with theoretical predictions. These findings provide a feasible pathway toward high-uniformity quantum-battery charging.

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Cite

BibTeXRIS
BibTeX
@misc{gong2026achieving,
  title = {{Achieving Identical Stored Energy in Cascaded Collisional Quantum Battery Charging: Analytical Result}},
  author = {Longyan Gong and Jing Zhang and Yongtao Li},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.01332},
  eprint = {2610.01332},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.01332},
}
RIS
TY  - UNPB
TI  - Achieving Identical Stored Energy in Cascaded Collisional Quantum Battery Charging: Analytical Result
AU  - Longyan Gong
AU  - Jing Zhang
AU  - Yongtao Li
PY  - 2026
DA  - 2026/10/01
PB  - arXiv
DO  - 10.48550/arxiv.2610.01332
UR  - https://arxiv.org/abs/2610.01332
AB  - Charging uniformity across distinct trials is an essential requirement for reliable quantum batteries. Nevertheless, intrinsic quantum stochasticity poses a fundamental challenge to this goal. This work investigates a two-qubit quantum battery within the framework of cascaded collision models. We propose an adaptive measurement on the charger after each collision, yielding two conditional battery states of equal expected stored energy. For chargers prepared in the excited state, we analytically prove that complete suppression of trajectory-dependent stored-energy fluctuations is attainable; for chargers prepared in general superposition states, our theory reveals that full suppression is fundamentally prohibited owing to battery-phase-dependent recursive dynamics. Numerical simulations are in excellent quantitative agreement with theoretical predictions. These findings provide a feasible pathway toward high-uniformity quantum-battery charging.
ER  -