Fluctuation-free Quantum Battery Charging Enabled by Bell-like Entangled and Separable Charger States
Abstract
The implication of entanglement in quantum battery charging remains poorly understood. In addition, intrinsic quantum randomness poses a fundamental challenge to charging uniformity across distinct trials. To address these issues, we study a three-qubit system within a cascaded collision frame, with two qubits acting as the charger and the third serving as the battery. After each collision, an adaptive measurement is performed on the charger, yielding four conditional post-measurement battery states with identical expected stored energy. For arbitrary fixed charger states, we derive analytical expressions for the recurrence relation of stored energy. We find that stored-energy fluctuations depend on whether the dynamics relies on the battery phase γn. For two Bell-like families of entangled states, together with their computational basis states termed Bell-like separable states, the dynamics is γn-independent and fluctuations vanish, whereas for other entangled and separable states, fluctuations emerge. These insights establish a paradigm for engineering charger states to design uniform-charging quantum-battery architectures despite inherent quantum randomness.
Related
- Charging of a quantum battery by a two-photon quantum pulse
- Achieving Identical Stored Energy in Cascaded Collisional Quantum Battery Charging: Analytical Result
- Non-Markovian Charging of a Micromaser Quantum Battery
- Stable Long-Range Charging and Boundary-Mediated Thresholds in a Waveguide Quantum Battery
- Battery Locality Is Necessary in Noncommuting Quantum Charging Bounds
BibTeX
@misc{gong2026fluctuationfree,
title = {{Fluctuation-free Quantum Battery Charging Enabled by Bell-like Entangled and Separable Charger States}},
author = {Longyan Gong and Jing Zhang and Yongtao Li},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.31242},
eprint = {2610.31242},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.31242},
}
RIS
TY - UNPB
TI - Fluctuation-free Quantum Battery Charging Enabled by Bell-like Entangled and Separable Charger States
AU - Longyan Gong
AU - Jing Zhang
AU - Yongtao Li
PY - 2026
DA - 2026/10/22
PB - arXiv
DO - 10.48550/arxiv.2610.31242
UR - https://arxiv.org/abs/2610.31242
AB - The implication of entanglement in quantum battery charging remains poorly understood. In addition, intrinsic quantum randomness poses a fundamental challenge to charging uniformity across distinct trials. To address these issues, we study a three-qubit system within a cascaded collision frame, with two qubits acting as the charger and the third serving as the battery. After each collision, an adaptive measurement is performed on the charger, yielding four conditional post-measurement battery states with identical expected stored energy. For arbitrary fixed charger states, we derive analytical expressions for the recurrence relation of stored energy. We find that stored-energy fluctuations depend on whether the dynamics relies on the battery phase γ_n. For two Bell-like families of entangled states, together with their computational basis states termed Bell-like separable states, the dynamics is γ_n-independent and fluctuations vanish, whereas for other entangled and separable states, fluctuations emerge. These insights establish a paradigm for engineering charger states to design uniform-charging quantum-battery architectures despite inherent quantum randomness.
ER -