论文标题
集体量子发动机可靠性的二次增强
Quadratic Enhancement in the Reliability of Collective Quantum Engines
论文作者
论文摘要
我们研究了在集体系统伴有相互作用的存在下运行的多体量子热发动机的波动。我们表明，可以利用开放量子系统中的集体效应来开发高度一致的多体量子发动机。我们考虑量子奥托引擎，由$ n $旋转建模，共同耦合到热浴。我们的结果表明，集体效应可以大大减少输出工作中的波动，这是通过高可靠性（$ r $）和低热力学不确定性量化的。与独立发动机相反，我们证明了其集体对应物的可靠性$ r $的二次增强。我们将分析扩展到相互作用的旋转模型的情况，这些模型通常在多体物理学中，例如Lipkin-Meshkov-Glick（LMG）模型，从而大大扩大了量子热机中集体效应的适用性。这为许多车身系统中现实的集体量子热机铺平了前进的方向。
We study fluctuations in many-body quantum heat engines operating in the presence of collective system-bath interactions. We show that collective effects in open quantum systems can be harnessed to develop highly consistent many-body quantum engines. We consider quantum Otto engines, modeled by $n$ spins collectively coupled to thermal baths. Our results show that collective effects can significantly reduce the fluctuations in the output work, quantified by high reliability ($r$) and low thermodynamic uncertainty. In contrast to independent engines, we demonstrate a quadratic enhancement of the reliability $r$ for their collective counterparts. We extend our analysis to the case of interacting spin models commonly studied in many-body physics, such as the Lipkin-Meshkov-Glick (LMG) model, thereby broadening the regime of applicability of collective effects in quantum thermal machines significantly. This paves the way forward for realistic collective quantum thermal machines in many body systems.
