Charging batteries with quantum squeezing

Centrone, Federico; Mancino, Luca; Paternostro, Mauro

doi:10.48550/arxiv.2106.07899

“…In Ref. [27], the authors studied dynamics of a continuous variable QB coupled weakly to the squeezed thermal reservoir and managed to control the performance of the charging process by boosting the quantum squeezing of reservoir. A feasible route for harnessing loss-free dark states for stabilizing the stored energy of a qubit-based open QB has been introduced in [28].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the performance of an open quantum battery by adjusting its velocity

Mojaveri,

Bahrbeig,

Fasihi

et al. 2023

Preprint

0

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The performance of open quantum batteries (QBs) is severely limited by decoherence due to the interaction with the surrounding environment. So, protecting the charging processes against decoherence is of great importance for realizing QBs. In this work we address this issue by developing a charging process of a qubit-based open QB composed of a qubit-battery and a qubit-charger, where each qubit moves inside an independent cavity reservoir. Our results show that, in both the Markovian and non-Markovian dynamics, the charging characteristics, including the charging energy, efficiency and ergotropy, regularly increase with increasing the speed of charger and battery qubits. Interestingly, when the charger and battery move with higher velocities, the initial energy of the charger is completely transferred to the battery in the Markovian dynamics. In this situation, it is possible to extract the total stored energy as work for a long time. Our findings show that open moving-qubit systems are robust and reliable QBs, thus making them a promising candidate for experimental implementations.

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“…To date, the research on QBs has been devoted mainly to find efficient ways to store energy into quantum system and release it on demand to locally supply energy to miniaturized devices [20,26,27,32,39,40]. An interesting and still largely unexplored new development is related to the possibility of coherently transfer en-ergy among distant quantum systems, realizing the energetic counterpart of the two-qubit SWAP logic gate which plays a major role in quantum information and quantum computation [41].…”

Section: Introductionmentioning

confidence: 99%

Enhancing coherent energy transfer between quantum devices via a mediator

Crescente¹,

Ferraro²,

Carrega³

et al. 2022

Preprint

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We investigate the coherent energy transfer between two quantum systems mediated by a quantum bus. In particular, we consider the energy transfer process between two qubits, and how it can be influenced by using a third qubit or photons in a resonant cavity as mediators. Inspecting different figures of merit and considering both on and off-resonance configurations, we characterize the energy transfer performances. We show that, while the qubit-mediated transfer only offers very few advantages with respect to a direct coupling case, the cavity-mediated one is progressively more and more efficient as a function of the number of photons stored in the cavity that acts as a quantum bus. The speeding-up of the energy transfer time, due to a quantum mediator paves the way for new architecture designs in quantum technologies and energy based quantum logics.

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Enhancing the direct charging performance of an open quantum battery by adjusting its velocity

Mojaveri,

Jafarzadeh Bahrbeig,

Fasihi

et al. 2023

Sci Rep

5

0

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The performance of open quantum batteries (QBs) is severely limited by decoherence due to the interaction with the surrounding environment. So, protecting the charging processes against decoherence is of great importance for realizing QBs. In this work we address this issue by developing a charging process of a qubit-based open QB composed of a qubit-battery and a qubit-charger, where each qubit moves inside an independent cavity reservoir. Our results show that, in both the Markovian and non-Markovian dynamics, the charging characteristics, including the charging energy, efficiency and ergotropy, regularly increase with increasing the speed of charger and battery qubits. Interestingly, when the charger and battery move with higher velocities, the initial energy of the charger is completely transferred to the battery in the Markovian dynamics. In this situation, it is possible to extract the total stored energy as work for a long time. Our findings show that open moving-qubit systems are robust and reliable QBs, thus making them a promising candidate for experimental implementations.

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Charging batteries with quantum squeezing

Cited by 3 publications

References 15 publications

Enhancing the performance of an open quantum battery by adjusting its velocity

Enhancing the performance of an open quantum battery by adjusting its velocity

Enhancing coherent energy transfer between quantum devices via a mediator

Enhancing the direct charging performance of an open quantum battery by adjusting its velocity

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