A quantum open system model of molecular battery charged by excitons

Alicki, Robert

doi:10.1063/1.5096772

Cited by 25 publications

(8 citation statements)

References 24 publications

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“…In particular, they are driven either by quantum entanglement, that reduces the number of traversed states in the Hilbert space compared to (classical) separable states alone [1][2][3][4][12][13][14][15][16] , or by cooperative behaviour that increases the effective quantum coupling between battery and source [17][18][19] .…”

mentioning

confidence: 99%

An organic quantum battery

Quach

McGhee

Ganzer

et al. 2020

Preprint

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Quantum batteries harness the unique properties of quantum mechanics to enhance energy storage compared to conventional batteries. In particular, they are predicted to undergo superextensive charging, where batteries with larger capacity actually take less time to charge. Up until now however, they have not been experimentally demonstrated, due to the challenges in quantum coherent control. Here we implement an array of two-level systems coupled to a photonic mode to realise a Dicke quantum battery. Our quantum battery is constructed with a microcavity formed by two dielectric mirrors enclosing a thin ﬁlm of a fluorescent molecular dye in a polymer matrix. We use ultrafast optical spectroscopy to time resolve the charging dynamics of the quantum battery at femtosecond resolution. We experimentally demonstrate superextensive increases in both charging power and storage capacity, in agreement with our theoretical modelling. We find that decoherence plays an important role in stabilising energy storage, analogous to the role that dissipation plays in photosynthesis. This experimental proof-of-concept is a major milestone towards the practical application of quantum batteries in quantum and conventional devices. Our work opens new opportunities for harnessing collective effects in light-matter coupling for nanoscale energy capture, storage, and transport technologies, including the enhancement of solar cell efficiencies.

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confidence: 99%

An organic quantum battery

Quach

McGhee

Ganzer

et al. 2020

Preprint

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“…Besides the fundamental results, how can highperformance QBs be realized in concrete systems utilizing collective enhancements? Various models have been examined so far to address this issue [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Locality of the operation is one of the important issues for the experimental feasibility.…”

Section: Introductionmentioning

confidence: 99%

“…Open QBs are models of QBs where QBs are treated as open systems in contrast to closed QBs where QBs are treated as closed systems. Open QBs are recently gathering attention to address the problem of stabilization of the charging under the environmental dissipation [17,21,27,30,[34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Collectively enhanced high-power and high-capacity charging of quantum batteries via quantum heat engines

Ito,

Watanabe

2020

Preprint

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As a model of so-called quantum battery (QB), quantum degrees of freedom as energy storage, we study a charging protocol of many two-level systems (TLSs) using quantum heat engines. We focus on the collective enhancement effects in the charging performance of QBs in comparison to the individual charging. It is a challenging goal of QBs to achieve large collective enhancements in the charging power and the capacity in keeping with experimental feasibility, the stability, and the cheapness of the required control and resources. We show that our model actually exhibits these features. In fact, our protocol simultaneously achieves the asymptotically full charge and close to optimal high power with only thermal energy resource and simple local interactions in a stable manner. The capacity is collectively enhanced due to the emergent bosonic quantum statistics caused by the symmetry of the interaction between the engine and the batteries, which results in asymptotically perfect excitation of all the TLSs. The charging speed, and hence the average power are collectively enhanced by the superradiance-like cooperative excitation in the effective negative temperature.

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“…The MME was obtained with application of celebrated Floquet theory in the usual regime of weak coupling limit. This approach proved itself to be of particular importance for laser spectroscopy and quantum thermodynamics [3,4,5], ultimately leading to major advancements in description of quantum heat engines, solar cells and related ideas [6,7,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

On the Floquet analysis of commutative periodic Lindbladians in finite dimension

Szczygielski

2019

Preprint

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We consider the Markovian Master Equation over matrix algebra M d , governed by periodic Lindbladian in standard (Kossakowski-Lindblad-Gorini-Sudarshan) form. It is shown that under simplifying assumption of commutativity, the Floquet normal form of resulting completely positive dynamical map is not guaranteed to be given by simultaneously globally Markovian maps. In fact, the periodic part of the solution is even shown to be necessarily non-Markovian. Two examples in algebra M 2 are explicitly calculated: a periodically modulated random qubit dynamics, being a generalization of pure decoherence scheme, and a classically perturbed two-level system, coupled to reservoir via standard ladder operators.

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A quantum open system model of molecular battery charged by excitons

Cited by 25 publications

References 24 publications

An organic quantum battery

An organic quantum battery

Collectively enhanced high-power and high-capacity charging of quantum batteries via quantum heat engines

On the Floquet analysis of commutative periodic Lindbladians in finite dimension

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