标题： 轴子宇宙学的实验室研究 显示英文标题

标题： Axion cosmology in the laboratory

摘要： 先进的约瑟夫森结技术、SQUIDs、耦合的约瑟夫森量子比特以及纳米技术中使用的相关超导器件与早期宇宙暗物质问题有什么共同之处呢？ 比表面上看起来要多得多，这将在本信中展示。 宇宙中暗物质的主要候选者之一是轴子。 如果正确地重新解释数学方程中的符号，轴子失谐角的运动方程和约瑟夫森结中的相位差方程是相同的。 这使得可以使用诸如SQUIDs和约瑟夫森结等超导电子器件对早期宇宙物理进行类比模拟。 这也允许新的实验设置，在约瑟夫森结环境中测试轴子相互作用强度，其性质类似于最近测试两个耦合约瑟夫森量子比特量子纠缠的实验。 对于早期宇宙轴子宇宙学相关的参数值，可以通过当今纳米技术的成就来实现。 显示英文摘要

摘要： What do advanced Josephson junction technologies, SQUIDs, coupled Josephson qubits and related superconducting devices used in nanotechnology have in common with the problem of dark matter in the early universe? A lot more than might seem obvious at first sight, as will be shown in this letter. One of the major candidates for dark matter in the universe is the axion. The equation of motion of the axion misalignment angle and that of the phase difference in a Josephson junction are identical if the symbols in the mathematical equations are properly re-interpreted. This allows for analogue simulation of early-universe physics using superconducting electronic devices such as SQUIDs and Josephson junctions. It also allows for new experimental setups that test axionic interaction strengths in a Josephson junction environment, similar in nature to recent experiments that test for quantum entanglement of two coupled Josephson qubits. The parameter values relevant for early-universe axion cosmology are accessible with present day's achievements in nanotechnology.