论文标题
用于冷却多量系统的少量量子冰箱
Few-qubit quantum refrigerator for cooling a multi-qubit system
论文作者
论文摘要
我们建议将几个Qubit System用作紧凑的量子冰箱来冷却相互作用的多Qubit系统。我们特别考虑了一个中央量子，以所谓的自旋型号在我们的量子冰箱中耦合到$ n $ ancilla Qubits。我们首先表明，如果Qubits之间的相互作用是纵向和铁磁模型形式的形式，则中央量子比环境更冷。然后建议将较冷的中央固定位用作量子冰箱的制冷剂界面，以冷却一般的量子多数系统。考虑到操作成本和冷却效率，我们讨论了一个简单的制冷周期，可以由$ n $和Qubit-Qubit的相互作用强度控制。此外，还建立了可实现的温度的界限。如此少量的紧凑型量子冰箱对于降低量子技术应用的维度可能很重要，可以易于集成到全Qubity系统中，并且可以提高量子计算和热力设备的速度和功率。
We propose to use a few-qubit system as a compact quantum refrigerator for cooling an interacting multi-qubit system. We specifically consider a central qubit coupled to $N$ ancilla qubits in a so-called spin-star model as our quantum refrigerator. We first show that if the interaction between the qubits is of the longitudinal and ferromagnetic Ising model form, the central qubit is colder than the environment. The colder central qubit is then proposed to be used as the refrigerant interface of the quantum refrigerator to cool down general quantum many-qubit systems. We discuss a simple refrigeration cycle, considering the operation cost and cooling efficiency, which can be controlled by $N$ and the qubit-qubit interaction strength. Besides, bounds on the achievable temperature are established. Such few-qubit compact quantum refrigerators can be significant to reduce dimensions of quantum technology applications, can be easy to integrate into all-qubit systems, and can increase the speed and power of quantum computing and thermal devices.
