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Collective enhancement in dissipative quantum batteries.

Javier Carrasco1, Jerónimo R Maze2,3, Carla Hermann-Avigliano1,4

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We investigated a quantum battery with interacting qubits and found that collective effects enhance performance even with energy losses. Increasing battery size mitigates performance degradation from dissipation.

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Area of Science:

  • Quantum physics
  • Quantum computing
  • Energy storage

Background:

  • Quantum batteries offer potential for efficient energy storage.
  • Dissipation and losses are significant challenges in quantum systems.
  • Understanding collective effects in quantum batteries is crucial for development.

Purpose of the Study:

  • To analyze the performance of a quantum battery composed of non-mutually interacting qubits.
  • To quantify charging energy, ergotropy, transfer rate, and power in a dissipative environment.
  • To investigate the impact of dissipation on collective enhancements and explore mitigation strategies.

Main Methods:

  • Modeling a quantum battery with N qubits coupled to a single dissipative electromagnetic field mode.
  • Quantifying key performance metrics including charging energy and ergotropy.
  • Analyzing the influence of dissipation and battery size on system performance.

Main Results:

  • Collective enhancements in quantum batteries persist despite dissipative losses.
  • Dissipation can paradoxically increase collective enhancements.
  • Scaling up the quantum battery size reduces performance deterioration caused by dissipation.

Conclusions:

  • Quantum batteries can maintain collective enhancements even in the presence of losses.
  • Dissipation's effect on performance can be managed by increasing the number of qubits.
  • Findings are relevant for experimental quantum battery realizations facing practical limitations.