نتایج جستجو برای: weak topological center
تعداد نتایج: 486654 فیلتر نتایج به سال:
We show that if U∗ is a hypercover of a topological space X then the natural map hocolimU∗ → X is a weak equivalence. This fact is used to construct topological realization functors for the A-homotopy theory of schemes over real and complex fields.
Electrons hopping on the sites of a three-dimensional pyrochlore lattice are shown to form topologically nontrivial insulating phases when the spin-orbit (SO) coupling and lattice distortions are present. Of 16 possible topological classes 9 are realized for various parameters in this model. Specifically, at half-filling an undistorted pyrochlore lattice with a SO term yields a "pristine" stron...
The topological pressure is defined for subadditive sequence of potentials in bundle random dynamical systems. A variational principle for the topological pressure is set up in a very weak condition. The result may have some applications in the study of multifractal analysis for random version of nonconformal dynamical systems.
Observation of Anderson localization in ultrathin films of three-dimensional topological insulators.
Anderson localization, the absence of diffusive transport in disordered systems, has been manifested as hopping transport in numerous electronic systems, whereas in recently discovered topological insulators it has not been directly observed. Here, we report experimental demonstration of a crossover from diffusive transport in the weak antilocalization regime to variable range hopping transport...
Measurement plays a quintessential role in the control of quantum systems. Beyond initialization and readout which pertain to projective measurements, weak particular through their back action on system, may enable various levels coherent control. The latter ranges from observing trajectories state dragging steering. Furthermore, just like adiabatic evolution states that is known induce Berry p...
The exotic topological domains in ferroelectrics and multiferroics have attracted extensive interest in recent years due to their novel functionalities and potential applications in nanoelectronic devices. One of the key challenges for these applications is a realization of robust yet reversibly switchable nanoscale topological domain states with high density, wherein spontaneous topological st...
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