论文标题
部分可观测时空混沌系统的无模型预测
On the Excitations of a Balian-Werthamer Superconductor
论文作者
论文摘要
My contribution to this collection of articles in honor of David Lee and John Reppy on their 90th birthdays is a reflection on the remarkable phenomenology of the excitation spectra of superfluid $^3$He, in particular the B-phase which was identified by NMR and acoustic spectroscopy as Balian-Werthamer state shown in 1963 to be the ground state of a spin-triplet, p-wave superconductor within弱耦合BCS理论。 $^3 $的超氟阶段为电子超导体提供了范式，时空对称性断裂和非平凡地面拓扑。确实，断裂的自旋和轨道旋转对称性导致了可以使用NMR，声学和微波光谱镜检测到的阶参数的丰富集体模式。 BW状态的拓扑表明其低温，低能运输特性以限制在边界或接口上的无间隙主要模式为主导。鉴于BW状态发挥的核心作用，我讨论了BW状态的声学和电磁特征，如果实现了超氟$^3 $ he-b的电子类似物，则后者是相关的。
My contribution to this collection of articles in honor of David Lee and John Reppy on their 90th birthdays is a reflection on the remarkable phenomenology of the excitation spectra of superfluid $^3$He, in particular the B-phase which was identified by NMR and acoustic spectroscopy as Balian-Werthamer state shown in 1963 to be the ground state of a spin-triplet, p-wave superconductor within weak-coupling BCS theory. The superfluid phases of $^3$He provide paradigms for electronic superconductors with broken space-time symmetries and non-trivial ground-state topology. Indeed broken spin- and orbital rotation symmetries lead to a rich spectrum of collective modes of the order parameter that can be detected using NMR, acoustic and microwave spectroscopies. The topology of the BW state implies its low-temperature, low-energy transport properties are dominated by gapless Majorana modes confined on boundaries or interfaces. Given the central role the BW state played I discuss the acoustic and electromagnetic signatures of the BW state, the latter being relevant if an electronic analog of superfluid $^3$He-B is realized.
