5,355 research outputs found
Cross-correlations mediated by Majorana bound states
We consider the correlated parallel transport through two quantum dots which
are tunnel-coupled to the ends of a semiconductor nanowire where the Majorana
bound states (MBSs) may emerge under proper conditions. In terms of the
cross-correlation of currents, we reveal unusual behaviors originated from the
nonlocal MBSs, including such as the distinct symmetry and antisymmetry of the
spectral density in response to the dot-level modulations, and the vanished
cross correlation occurred when any of the dot-levels is in resonance with the
Majorana zero mode
Demonstrating nonlocality induced teleportation through Majorana bound states in a semiconductor nanowire
It was predicted by Tewari [Phys. Rev. Lett. {\bf 100}, 027001 (2008)] that a
teleportationlike electron transfer phenomenon is one of the novel consequences
of the existence of Majorana fermion, because of the inherently nonlocal
nature. In this work we consider a concrete realization and measurement scheme
for this interesting behavior, based on a setup consisting of a pair of quantum
dots which are tunnel-coupled to a semiconductor nanowire and are jointly
measured by two point-contact detectors. We analyze the teleportation dynamics
in the presence of measurement backaction and discuss how the teleportation
events can be identified from the current trajectories of strong response
detectors.Comment: 5 pages, 3 figure
Description of females of Fannia imperatoria Nishida and Phaonia vagata Xue & Wang (Diptera: Muscoidea)
The females of Fannia imperatoria Nishida and Phaonia vagata Xue & Wang are recorded for the first time. Detailed descriptions of the females of these two species are provided based on the newly found specimens. The specimens studied are deposited in the Institute of Entomology, Shenyang Normal University
Folding approach to topological order enriched by mirror symmetry
We develop a folding approach to study two-dimensional symmetry-enriched topological (SET) phases with the mirror reflection symmetry. Our folding approach significantly transforms the mirror SETs, such that their properties can be conveniently studied through previously known tools: (i) it maps the nonlocal mirror symmetry to an onsite Z[subscript 2] layer-exchange symmetry after folding the SET along the mirror axis, so that we can gauge the symmetry; (ii) it maps all mirror SET information into the boundary properties of the folded system, so that they can be studied by the anyon condensation theory—a general theory for studying gapped boundaries of topological orders; and (iii) it makes the mirror anomalies explicitly exposed in the boundary properties, i.e., strictly 2D SETs and those that can only live on the surface of a 3D system can be easily distinguished through the folding approach. With the folding approach, we derive a set of physical constraints on data that describes mirror SET, namely, mirror permutation and mirror symmetry fractionalization on the anyon excitations in the topological order. We conjecture that these constraints may be complete, in the sense that all solutions are realizable in physical systems. Several examples are discussed to justify this. Previously known general results on the classification and anomalies are also reproduced through our approach.China. Ministry of Science and Technology (Grant 2015CB921700)National Natural Science Foundation (China) (Grant 11874115)Perimeter Institute for Theoretical Physic
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