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Sensitive detection of Majorana fermions based on a hybrid spin-microcantilever via enhanced spin resonance spectrum

机译：混合自旋微悬臂梁通过增强的自旋共振谱灵敏地检测马约拉纳费米子

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摘要

Motivated by recent experimental progress towards the detection and manipulation of Majorana fermions in ferromagnetic atomic chains on a superconductor, we present a novel proposal based on a single-crystal diamond (SCD) microcantilever with a single nitrogen-vacancy (NV) center spin embedded in ultrapure diamond substrate to probe Majorana fermions in an all-optical domain. With this scheme, a possible distinct Majorana signature is investigated via the electron spin resonance spectrum. In the proposal, the SCD microcantilever behaves as a phonon cavity and is robust for detecting of Majorana fermions, while the NV center spin can be considered as a sensitive probe. Further, the vibration of the microcantilever will enhance the coupling effect, which makes the Majorana fermions more sensitive to detection and the well-established optical NV spin readout technology will certainly promote the detection. This proposed method may provide a potential supplement for the detection of Majorana fermions.
机译：根据最近在超导体上检测和操纵铁磁原子链中的马约拉纳费米子的实验进展的动机，我们提出了一种基于单晶金刚石（SCD）微悬臂梁并嵌入单氮空位（NV）中心自旋的新提议。超纯金刚石基板，可在全光学域中探测马里亚纳邦的费米子。通过该方案，通过电子自旋共振谱研究了可能的独特的马约拉纳签名。在该建议中，SCD微悬臂梁表现为声子腔，对于检测马里亚纳邦的费米子具有鲁棒性，而NV中心自旋可被视为敏感探针。此外，微悬臂梁的振动将增强耦合效果，这使得马里亚纳邦的费米子对检测更加敏感，而完善的光学NV自旋读出技术必将促进检测。该方法可以为马约拉纳费米子的检测提供潜在的补充。

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