近日， 德国凯泽斯劳滕理工大学的J. R. Anglin及其研究团队取得一项新进展。经过不懈努力，他们从量子点到晶格气体视角对通过含局部损耗晶格的传输进行研究。相关研究成果已于2024年10月22日在国际知名学术期刊《物理评论A》上发表。

本文展示了该模型如何代表一大类可用光学晶格中冷量子气体实现的模型的一个极限情形。虽然量子气体的实现允许调整许多系统参数，但研究人员注意到有限尺寸效应带来的限制，并得出结论：量子点和量子气体为理解有损有限晶格中的传输提供了互补的视角。

据悉，最近的研究工作探讨了费米子通过有限一维量子点晶格的传输过程，其中中央晶格格位存在局域粒子损失。晶格每端的量子点都连接到宏观导线，这些导线被视为在给定电势差下自由费米子的零温度储库。

附：英文原文

Title: Transport through a lattice with local loss: From quantum dots to lattice gases

Author: J. R. Anglin

Issue&Volume: 2024/10/22

Abstract: Recent work has studied fermion transport through a finite one-dimensional lattice of quantum dots, with localized particle loss from the central lattice site. The dots at each end of the lattice are connected to macroscopic leads, represented as zero-temperature reservoirs of free fermions with a given potential difference. Here we show how this model represents one limiting case of a larger class of models that can be realized with cold quantum gases in optical lattices. While quantum gas realizations allow many system parameters to be varied, we note limitations from finite-size effects and conclude that quantum dots and quantum gases offer complementary views on transport through lossy finite lattices.

DOI: 10.1103/PhysRevA.110.043317

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.043317