Topological one-way fiber of second Chern number
نویسندگان
چکیده
منابع مشابه
Topological one-way fiber of second Chern number
Optical fiber is a ubiquitous and indispensable component in communications, sensing, biomedicine and many other lightwave technologies and applications. Here we propose topological one-way fibers to remove two fundamental mechanisms that limit fiber performance: scattering and reflection. We design three-dimensional (3D) photonic crystal fibers, inside which photons propagate only in one direc...
متن کاملCharacterization of Topological States on a Lattice with Chern Number
We study Chern numbers to characterize the ground state of strongly interacting systems on a lattice. This method allows us to perform a numerical characterization of bosonic fractional quantum Hall (FQH) states on a lattice where conventional overlap calculation with known continuum case such as Laughlin state, breaks down. We calculate the Chern number by manipulating the twist angles of boun...
متن کاملMeasuring Topological Number of a Chern-Insulator from Quench Dynamics
In this letter we address the issue that whether the topological number of a static Hamiltonian can be measured from a dynamical quench process. We focus on a two-band Chern insulator in twodimension, for instance, the Haldane model, whose quantum state is a pseudo-spin on the Bloch sphere. The dynamical process is described by a mapping from the [kx, ky, t] space to the Bloch sphere, character...
متن کاملMultimode one-way waveguides of large Chern numbers.
Current experimental realizations of the quantum anomalous Hall phase in both electronic and photonic systems have been limited to a Chern number of one. In photonics, this corresponds to a single-mode one-way edge waveguide. Here, we predict quantum anomalous Hall phases in photonic crystals with large Chern numbers of 2, 3, and 4. These new topological phases were found by simultaneously gapp...
متن کاملTopological Phononic Crystals with One-Way Elastic Edge Waves.
We report a new type of phononic crystals with topologically nontrivial band gaps for both longitudinal and transverse polarizations, resulting in protected one-way elastic edge waves. In our design, gyroscopic inertial effects are used to break the time-reversal symmetry and realize the phononic analogue of the electronic quantum (anomalous) Hall effect. We investigate the response of both hex...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Communications
سال: 2018
ISSN: 2041-1723
DOI: 10.1038/s41467-018-07817-3