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We theoretically propose an optical means to detect Majorana fermions in superconducting iron (Fe) chains with a hybrid quantum dot-nanomechanical resonator system driven by two-tone fields, which is very different from the current tunneling spectroscopy experiments with electrical means. Based on the scheme, the phenomenon of Majorana modes induced transparency is demonstrated and a straightforward method to determine the quantum dot-Majorana fermions coupling strength is also presented. We further investigate the role of the nanomechanical resonator, and the resonator behaving as a phonon cavity enhances the exciton resonance spectrum, which is robust for detecting of Majorana fermions. The coherent optical spectrum affords a potential supplement to detecte Majorana fermions and supports Majorana fermions-based topological quantum computation in superconducting iron chains.
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http://dx.doi.org/10.1038/srep36600 | DOI Listing |
Sci Adv
September 2025
Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Topological superconductors are one of the intriguing material groups from the viewpoint of not only condensed matter physics but also industrial applications such as quantum computers based on Majorana fermion. For real applications, developments of thin-film topological superconductors are highly desirable. Bi/Ni bilayer is a possible candidate for thin-film chiral superconductors where the time-reversal symmetry is broken.
View Article and Find Full Text PDFJ Phys Chem Lett
August 2025
National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
The discovery of intrinsic magnetism in layered van der Waals (vdW) magnets has received intensive attention due to their fundamental importance in low-dimensional magnetism and potential device applications. To date, most vdW magnets contain 3d transition metals. Extending vdW magnetism to 4d and 5d transition metal systems is therefore of great interest as it offers opportunities to explore exotic magnetic behaviors arising from the interplay between electronic correlations and strong spin-orbit coupling (SOC).
View Article and Find Full Text PDFPhys Rev Lett
June 2025
University of Tokyo, Department of Applied Physics, Tokyo 113-8656, Japan.
Competition among repetitive measurements of noncommuting observables and unitary dynamics can give rise to a wide variety of entanglement phases. Here, we propose a general framework based on Lyapunov analysis to characterize topological properties in monitored quantum systems through their spectrum and many-body topological invariants. We illustrate this framework by analyzing (1+1)-dimensional monitored circuits for Majorana fermions, which are known to exhibit topological and trivial area-law entangled phases as well as a critical phase with sub-volume-law entanglement.
View Article and Find Full Text PDFInorg Chem
July 2025
Chemical Sciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States.
The Kitaev model has served as a long-sought-after target in the realization of a quantum spin liquid that could host Majorana Fermions. Such non-Abelian anyons could revolutionize quantum computing if properly implemented to overcome decoherence. A 3d electronic configuration, like Co, has been explored by theory and experimental work to design Kitaev materials.
View Article and Find Full Text PDFPhys Rev Lett
May 2025
Technische Universität Dresden, Institut für Theoretische Physik and Würzburg-Dresden Cluster of Excellence ct.qmat, 01062 Dresden, Germany.
Superconductivity usually emerges from a metallic normal state which follows the Fermi-liquid paradigm. If, in contrast, the normal state is a fractionalized non-Fermi liquid, then pairing may either eliminate fractionalization via a Higgs-type mechanism leading to a conventional superconducting state, or pairing can occur in the presence of fractionalization. Here, we discuss a simple model for the latter case: using a combination of perturbation theory and functional renormalization group, we show that the Kitaev-Kondo lattice model displays a fractionalized superconducting phase at weak Kondo coupling.
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