Mandarino Antonio
International Centre for Theory of Quantum Technologies (ICTQT), University of Gdansk, 80-309 Gdansk, Poland.
Entropy (Basel). 2022 Jul 26;24(8):1031. doi: 10.3390/e24081031.
A three-terminal device, able to control the heat currents flowing through it, is known as a quantum thermal transistor whenever it amplifies two output currents as a response to the external source acting on its third terminal. Several efforts have been proposed in the direction of addressing different engineering options of the configuration of the system. Here, we adhere to the scheme in which such a device is implemented as a three-qubit system that interacts with three separate thermal baths. However, another interesting direction is how to engineer the thermal reservoirs to magnify the current amplification. Here, we derive a quantum dynamical equation for the evolution of the system to study the role of distinct dissipative thermal noises. We compare the amplification gain in different configurations and analyze the role of the correlations in a system exhibiting the thermal transistor effect, via measures borrowed from the quantum information theory.
一种三端器件，只要它能对作用于其第三端的外部源作出响应，放大两个输出电流，就被称为量子热晶体管，它能够控制流经它的热流。在解决系统配置的不同工程选择方面已经提出了几项努力。在这里，我们坚持这样一种方案，即这种器件被实现为一个与三个独立热库相互作用的三量子比特系统。然而，另一个有趣的方向是如何设计热库以放大电流放大。在这里，我们推导了系统演化的量子动力学方程，以研究不同耗散热噪声的作用。我们比较了不同配置下的放大增益，并通过从量子信息理论借用的度量，分析了在表现出热晶体管效应的系统中相关性的作用。
