Charging a quantum battery in a non-Markovian environment: a collisional model approach

Morrone, Daniele; Rossi, Matteo A. C.; Smirne, Andrea; Genoni, Marco G.

doi:10.48550/arxiv.2212.13488

Cited by 2 publications

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“…In order to favour this energy flow the cavity and the TLSs are usually assumed as resonant, namely characterized by the same typical energy. Once the charging process is complete, the coupling between the two systems is turned off, leaving the TLSs in a charged state whose stability crucially depends on their relaxation and dephasing times [12][13][14][15][16][17]. This kind of device displays a collective speed-up of the charging process.…”

Section: Introductionmentioning

confidence: 99%

Off-Resonant Dicke Quantum Battery: Charging by Virtual Photons

et al. 2023

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We investigate a Dicke quantum battery in the dispersive regime, where the photons trapped in a resonant cavity are much more energetic with respect to the two-level systems embedded into it. Under such off-resonant conditions, even an empty cavity can lead to the charging of the quantum battery through a proper modulation of the matter–radiation coupling. This counterintuitive behaviour has its roots in the effective interaction between two-level systems mediated by virtual photons emerging from the fluctuations of the quantum electromagnetic field. In order to properly characterize it, we address relevant figures of merit such as the stored energy, the time required to reach the maximum charging, and the averaged charging power. Moreover, the possibility of efficiently extracting energy in various ranges of parameters is discussed. The scaling of stored energy and power as a function of the number N of two-level systems and for different values of the matter–radiation coupling is also discussed, showing, in the strong coupling regime, performances in line with what is reported for the Dicke quantum battery in the resonant regime.

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Section: Introductionmentioning

confidence: 99%

Off-Resonant Dicke Quantum Battery: Charging by Virtual Photons

et al. 2023

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“…Though there are results considering this type of interaction between the battery and the environment's constituents, described by two-level systems [38][39][40][41], non of them have considered a quantum battery having two constituents. Furthermore, the behavior of the extractable work with entanglement shared between the two constituents in the presence of such noise has, to the best of our knowledge, never been explored.…”

Section: Introductionmentioning

confidence: 99%

Noisy quantum batteries

Sen¹,

Sen²

2023

Preprint

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In realistic situations, physical systems can not be completely isolated from its environment. Its inevitable interaction with the environment can influence the working process of the device. In this paper, we consider two-qubit quantum batteries where one qubit of the battery is successively interacting with the spins present in the surrounding environment. We examine the effect of the interaction on the maximum amount of energy that can be extracted from the battery using unitaries. In this context, we use the notion of locally passive states. In particular, we examine the behavior of the amount of extractable work from the noisy battery, initially prepared in a locally passive or ordinary pure state, having a fixed initial entanglement, with the number of interactions the qubit has gone through. We also examine the amount of locally extractable work from the noisy battery. We realize though the amount of extractable energy, be it global or local, as a whole will decrease with the number of spins of environment it interacted with, but if we increase the time interval of the interaction with each spin, after a cut off value of the interval, the small time behavior shows a peculiarity, i.e., the extractable energy within a single interaction starts to increase with time. The cut-off time indicates the Markovian-to-non-Markovian transition of the interaction. We also observe a non-Markovian increase in extractable energy from the Markovian scenario.

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Charging a quantum battery in a non-Markovian environment: a collisional model approach

Cited by 2 publications

References 0 publications

Off-Resonant Dicke Quantum Battery: Charging by Virtual Photons

Off-Resonant Dicke Quantum Battery: Charging by Virtual Photons

Noisy quantum batteries

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