Using Anderson pseudospins (Anderson, 1958; Bardeen et al., 1957), I suggested in 2012 (Baskaran, 2012) superradiant superconductivity (SRSC) and related Dicke phenomena in bulk superconductors. It was a response to a report from Cavalleri’s lab (Kaiser et al., 2012; Fausti et al., 2011), of transient room temperature supercondctivity in YBCO, when pumped by 20 THz laser pulses. In my minimal model, Anderson pseudospins in k-space in a bulk superconductor were coupled to single polariton mode. The model was adapted to the pseudogap normal state of YBCO to explain observed transient superconductivity. We also pointed out, possibility of other Dicke phenomena, (i) spontaneous superradiance above a critical polariton matter coupling, with no pumping, (ii) enhanced quantum entanglement near the critical coupling and (iii) superfluoresence. Here we revisit our early work. Recent discovery by Ebbesens group (Thomas et al., 2019) of large increase of superconducting Tc from 30 K to 45 K in K${}_3$C₆₀ via specially designed plasmon-phonon-polariton mode, but with no external pumping seems to be in line with our early prediction. Relevance of SRSC to developments, including other superradiant matters and Higgs Spectroscopy is pointed out.

使用安德森赝自旋 (Anderson, 1958; Bardeen et al., 1957)，我在 2012 年 (Baskaran, 2012)提出了超辐射超导(SRSC) 和体超导体中的相关迪克现象。这是对 Cavalleri 实验室（Kaiser 等人，2012 年；Fausti 等人，2011 年）的一份报告的回应，该报告称当由 20 THz 激光脉冲泵浦时，YBCO 中的瞬态室温超导性。在我的最小模型中，体超导体中 k 空间中的安德森赝自旋耦合到单极化子模式。该模型适用于 YBCO 的赝隙正常状态，以解释观察到的瞬态超导性。我们还指出，其他 Dicke 现象的可能性，（i）临界极化物质耦合上方的自发超辐射，没有泵浦，（ii）临界耦合附近增强的量子纠缠和（iii）超荧光。在这里，我们重新审视我们的早期工作。Ebbesens 小组 (Thomas et al.,${}_3$C ₆₀通过特别设计的等离子体-声子-极化子模式，但没有外部泵浦似乎符合我们的早期预测。指出了 SRSC 与发展的相关性，包括其他超辐射物质和希格斯光谱。