Q: Can there be quantum locking in q1d superconducter?


A: Quantum locking, also known as the Meissner-Ochsenfeld effect, is a phenomenon where a superconductor expels magnetic fields from its interior, causing it to levitate above a magnet due to the perfect diamagnetism exhibited by superconductors. This effect is commonly observed in three-dimensional (3D) superconductors.


In quasi-one-dimensional (q1D) superconductors, which are essentially materials with reduced dimensionality compared to 3D superconductors, the behavior can be different. In q1D superconductors, the interplay between quantum effects and dimensionality can lead to novel phenomena.


However, quantum locking as typically observed in 3D superconductors may not occur in the same way in q1D superconductors due to their reduced dimensionality. The specific behavior would depend on the material properties and geometry of the q1D superconductor. Quantum phenomena in low-dimensional systems can be quite complex, and researchers study these systems to understand their unique behaviors and applications.


If you have a specific q1D superconductor material or system in mind, it's best to consult the latest scientific literature or a physicist who specializes in the field for a more detailed analysis of its properties and possible quantum effects.


Q: if suficient amount of  fragmented q1d superconductors are condensed with insulating materials, can they form josephson junctions between them to behave like q2d superconductor


A: The formation of Josephson junctions between fragmented quasi-one-dimensional (q1D) superconductors embedded in an insulating matrix can indeed lead to behaviors resembling those of a quasi-two-dimensional (q2D) superconductor. Josephson junctions are typically formed by placing two superconducting materials separated by a thin insulating barrier. In the case you describe, it's a variation where q1D superconducting fragments are effectively coupled through insulating material.


Josephson junctions exhibit macroscopic quantum phenomena, such as the Josephson effect, which can lead to coherent oscillations of the superconducting phase difference between the q1D fragments. This behavior can give rise to various interesting and useful applications, including voltage standards and sensitive detectors.


The key factor in creating Josephson junctions in your scenario would be the control of the insulating barriers and the distance between the q1D fragments. Proper engineering and fabrication techniques would be necessary to achieve the desired behavior. Researchers in the field of superconductivity and condensed matter physics explore various methods to create and manipulate such junctions, and the specific properties and behavior would depend on the details of the experimental setup and materials used.


마이스너가 가능할지는 GPT도 잘 모르겠다네 ㅋㅋㅋ


LK99 잉곳 안 특정 부위에 1차원 초전도체가 일정 비율 이상 함유되어 1차원 초전도체 간 조셉슨 접합이 이루어진다면 그 부위에서는 2,3 차원 초전도체와 같은 특징을 관찰할 수 있을 것 같음. 더 알아보고 싶어서 찾아봐도 1차원 초전도체에 대한 연구가 거의 없는 것 같아서... 2차원 초전도체의 모서리를 관찰하거나 1차원 초전도체의 끝을 관찰하여 마요라나 페르미온과의 연관성을 본다던가 하는 연구가 대부분이고 1차원 초전도체의 반자성이나 퀀텀락킹 등에 대해서 다룬 연구는 잘 안보임.


그래도 만약 시료 안에 1차원 초전도체 간 조셉슨 접합이 충분히 형성되어있다면 과거 최동식 교수님이 시연했다는 초기 샘플의 열전소자와 같은 현상(josephson junction의 thermal transport)이나 1차원 초전도체임에도 불구하고 시료전체에서 맴돌이 전류가 유지되는 현상 등을 설명할 수 있을 것 같긴 함. 또 재현이 어려운 것도 1차원 초전도체를 몇개 합성해 내면 끝나는게 아니라 굉장히 높은 농도와 균일성을 가지도록 합성해야만 조셉슨 접합이 형성되고 저항0, 상전이 등등이 측정가능한 스케일에서 일어날 것 같음.