Comment on "High-Power Collective Charging of a Solid-State Quantum Battery" Article Swipe
In the Letter [Physical Review Letters 120, 117702 (2018)], Ferraro \emph{et al.} claimed a quantum advantage in the Dicke quantum battery (QB), whereby $N$ two-level systems (TLS) are coupled to a common photonic mode of a cavity. They argued that compared with the so-called Rabi QB, the Dicke QB exhibits a $\sqrt{N}$ quantum enhancement in the charging power because of the entanglement created by the common photonic mode. In this Comment, however, we demonstrate that the apparent $\sqrt{N}$ enhancement actually comes from the stronger cavity electric (or magnetic) field under the setup discussed in [Physical Review Letters 120, 117702 (2018)]. This is a trivial classical effect, and there is no true "quantum advantage" in the charging power of the Dicke QB. While somewhat similar questions regarding the origin of the claimed "quantum advantage" have been raised before, here we would like to make it clear that the $\sqrt{N}$ enhancement in [Physical Review Letters 120, 117702 (2018)] is purely a classical effect, not attributable to quantum entanglement or collective phenomena. Therefore, we believe that using the term "quantum battery" in this context may be inappropriate and misleading.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2411.04132
- https://arxiv.org/pdf/2411.04132
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4404399185
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4404399185Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2411.04132Digital Object Identifier
- Title
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Comment on "High-Power Collective Charging of a Solid-State Quantum Battery"Work title
- Type
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preprintOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-10-23Full publication date if available
- Authors
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Haowei Xu, L. JuList of authors in order
- Landing page
-
https://arxiv.org/abs/2411.04132Publisher landing page
- PDF URL
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https://arxiv.org/pdf/2411.04132Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2411.04132Direct OA link when available
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Battery (electricity), Power (physics), Quantum, Solid-state, Electrical engineering, State (computer science), Physics, Computer science, Engineering physics, Quantum mechanics, Engineering, AlgorithmTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- Related works (count)
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10Other works algorithmically related by OpenAlex
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