论文标题
通过非平衡热电流充电量子电池
Charging a quantum battery via non equilibrium heat current
论文作者
论文摘要
当量子系统受热梯度的约束时，它可以通过进入所谓的非平衡稳态（NESS）来维持稳定的非平衡热电流。在这里，我们表明NES构成了一种可以利用的热力学资源，可以为量子加热发动机燃料。这增加了最近报道的纳米级可用来源的列表，例如连贯，纠缠和量子测量。我们通过显示对两个Qubits量子电池的分析和数值研究来阐明这一概念，该研究由热梯度充电，并通过应用正确选择的单一栅极来释放。用于充电步骤的NES的存在可确保稳定的运行稳定的功率输出。减少充电步骤的持续时间会导致时间周期性的稳态伴随着效率和输出功率的提高。该设备可以使用不同的纳米技术平台实现。
When a quantum system is subject to a thermal gradient it may sustain a steady non-equilibrium heat current, by entering into a so-called non equilibrium steady state (NESS). Here we show that NESS constitute a thermodynamic resource that can be exploited to fuel a quantum heat engine. This adds to the list of recently reported sources available at the nano-scale, such as coherence, entanglement and quantum measurements. We elucidate this concept by showing analytic and numerical studies of a two-qubits quantum battery that is alternatively charged by a thermal gradient and discharged by application of a properly chosen unitary gate. The presence of a NESS for the charging step guarantees steady operation with positive power output. Decreasing the duration of the charging step results in a time periodic steady state accompanied by increased efficiency and output power. The device is amenable to implementation with different nanotechnology platforms.
