Dynamics of Heisenberg XYZ two-spin quantum battery

Physica A Statistical Mechanics and its Applications, Journal Year: 2025, Volume and Issue: 659, P. 130352 - 130352

Published: Jan. 6, 2025

Language: Английский

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Correlations Enable Lossless Ergotropy Transport

Physical Review Letters, Journal Year: 2025, Volume and Issue: 134(1)

Published: Jan. 7, 2025

"A battery powers a device" can be read as "work stored in the is being transported to device." In quantum batteries, total amount of work measured by ergotropy, which maximal extractable unitary operations. Transporting ergotropy fundamentally different from transporting energy, and here we find that gained even when transmission channel strictly energy conserving. We show that, generically, transport lossy whenever two systems start uncorrelated. contrast, for large class correlated initial states, gainful. Furthermore, single state used multiple times, allowing without losses an order magnitude more than capacity. Correlations are thus useful resource transport, quantify how this consumed during gainful transport.

Language: Английский

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Parallel ergotropy: Maximum work extraction via parallel local unitary operations

Physical review. A/Physical review, A, Journal Year: 2025, Volume and Issue: 111(1)

Published: Jan. 16, 2025

Language: Английский

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Resource theories with completely passive states and passive states as free states

Physical review. E, Journal Year: 2025, Volume and Issue: 111(1)

Published: Jan. 21, 2025

Work extractable from quantum systems can be viewed as a resource to perform some tasks. Here, we try relate the work theory. To do this, consider completely passive states and free and, by identifying operations, formulate theories where maximum is monotone. In particular, study how operations act on states, showing sort of temperature plays pivotal role in these theories.

Language: Английский

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Energy exchange statistics and fluctuation theorem for nonthermal asymptotic states

Physical review. E, Journal Year: 2025, Volume and Issue: 111(1)

Published: Jan. 21, 2025

Energy exchange statistics between two bodies at different thermal equilibria obey the Jarzynski-Wójcik fluctuation theorem. The corresponding energy scale factor is difference of inverse temperatures associated to equilibrium. In this work, we consider a dissipative quantum dynamics leading system towards possibly nonthermal, asymptotic state. To generalize theorem nonthermal states, identify sufficient condition I for existence an η^{*} that unique, finite, and time independent, such characteristic function distribution becomes identically equal 1 any time. This plays role temperatures. We discuss physical interpretation I, showing it amounts almost complete memory loss initial robustness our results against quantifiable deviations from validity evaluated by experimental studies on single nitrogen-vacancy center subjected sequence laser pulses dissipation.

Language: Английский

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Tunable qubit quantum battery with delta-pulse driving

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(3)

Published: Jan. 20, 2025

A quantum battery consisting of two coupled qubits driven by a delta-pulse is investigated. By using the framework open system, we obtain analytically several quantities describing performance battery. In particular, are interested in stored energy and extractable known as ergotropy. We discover that tuning driving strength coupling strength, can isolate origin ergotropy: coherences, population inversion, or combination them. Furthermore, increasing not only enhances energy, ergotropy charging power, but also reducing time, which boosts

Language: Английский

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Dynamics of quantum battery capacity under Markovian channels

Quantum Information Processing, Journal Year: 2025, Volume and Issue: 24(2)

Published: Jan. 24, 2025

Language: Английский

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Nonequilibrium quantum battery based on quantum measurements

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(1)

Published: Feb. 12, 2025

We propose and analyze the charging discharging processes of measurement-assisted quant um batteries, exploring how different measurement schemes affect their performance. It is found that applying projective measurements with a general basis optimizing parameters can enhance battery's performance, including increases in both energy ergotropy. Compared to local schemes, quantum battery exhibits significantly improved performance under nonlocal schemes. However, this improvement comes at cost higher resource expenditure Additionally, function as source, driving qubit-resonator system facilitate pumping. Our findings provide deeper insights into fundamental properties batteries driven by measurements, offering pathway toward design more efficient controllable systems. Published American Physical Society 2025

Language: Английский

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Nonlinearity and quantumness in thermodynamics: From principles to technologies

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: Feb. 14, 2025

The impact of quantum mechanics on thermodynamics, particularly the principles and designs heat machines (HMs), has been limited by incompatibility coherent evolution with dissipative, open-system nature all existing HMs their basic structure, which not radically changed since Carnot. We have recently proposed a paradigm change whereby conventional HM functionality is replaced few-mode coherent, closed systems nonlinear, e.g., cross-Kerr, inter-mode couplings. These couplings allow us to coherently filter incident thermal noise, transforming it into resource work information. Current technological advances enable engines, noise sensors, or microscopes based such operate sources few photons. This shift opens path toward new understanding exploitation relation between classical, thermodynamic behavior.

Language: Английский

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Single-atom dissipation and dephasing in Dicke and Tavis-Cummings quantum batteries

Physical review. A/Physical review, A, Journal Year: 2025, Volume and Issue: 111(2)

Published: Feb. 20, 2025

Language: Английский

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