论文标题
基于测量的多体量子系统的冷却
Measurement-based cooling of many-body quantum systems
论文作者
论文摘要
我们介绍了一种新型技术，可有效冷却多体量子系统，并以高忠诚度到其基础状态。该技术涉及最初应用强场外场，然后进行一系列自由度（单量）测量和射频脉冲（RF）脉冲序列，以沿场方向偏振系统。随后，该领域被绝热关闭，从而使系统能够按照量子绝热定理的约束。 我们提出了数值仿真结果，证明了应用于多体量子系统的原型的量子旋转链的技术的有效性。
We introduce a novel technique for efficiently cooling many-body quantum systems with unknown Hamiltonians down to their ground states with a high fidelity. The technique involves initially applying a strong external field followed by a sequence of single-degree-of-freedom (single-qubit) measurements and radiofrequency (RF) pulses to polarize the system along the field direction. Subsequently, the field is adiabatically switched off, allowing the system to evolve towards its ground state as governed by the quantum adiabatic theorem. We present numerical simulation results demonstrating the effectiveness of the technique applied to quantum spin chains with long-range and short-range interactions as prototypes for many-body quantum systems.
