Enhancement of an Unruh-DeWitt battery performance through quadratic environmental coupling

• URL: http://arxiv.org/abs/2411.02849v1
• Date: Tue, 05 Nov 2024 06:43:41 GMT
• Title: Enhancement of an Unruh-DeWitt battery performance through quadratic environmental coupling
• Authors: Arnab Mukherjee, Sunandan Gangopadhyay, A. S. Majumdar,
• Abstract summary: We consider an Unruh-DeWitt detector driven by a coherent classical pulse as a quantum battery. We show that the quadratic scalar field coupling enhances coherence and stability. We observe that decoherence is mitigated significantly, resulting in remarkable improvement in the battery capacity and efficiency.
• Score: 0.10713888959520207
• License:
• Abstract: We investigate relativistic effects on the performance of a quantum battery in an open quantum framework. We consider an Unruh-DeWitt detector driven by a coherent classical pulse as a quantum battery that is interacting with a massless scalar field through a quadratic coupling. The battery follows a trajectory composed of uniform acceleration along one direction, combined with constant four-velocity components in the orthogonal plane to the acceleration. Accelerated motion degrades the performance of the quantum battery rapidly in the absence of the orthogonal velocity component. We show that the quadratic scalar field coupling enhances coherence and stability in the presence of orthogonal velocity. We observe that decoherence is mitigated significantly, resulting in remarkable improvement in the battery capacity and efficiency compared to the case of the usual linear field coupling. This opens up the possibility of nonlinear environmental coupling enabling stored energy to be retained over longer durations, leading to more efficient operation of quantum devices.

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