Web17 jan. 2012 · We theoretically investigate the flow of electromagnetic waves in complex honeycomb photonic lattices with local PT symmetries. Such PT structure is introduced … Web10 jun. 2004 · When β = (1 + √5)/2, 1 + √2 and 2 + √3, we show that these arithmetic and algebraic structures lead to freely generated symmetry plane-groups for beta-lattices. These plane-groups are based on repetitions of discrete adapted rotations and translations we shall refer to as "beta-rotations" and "beta-translations".
PT-symmetry in honeycomb photonic lattices - Semantic Scholar
Web1 dec. 2024 · Solitons exist in the semi-infinite gap and are stable in several continuous regions in the nonlinear fractional Schrödinger equation. • The Lévy index (α) cannot change the critical threshold of the parity-time (PT)-symmetric optical lattices but can affect the stability of the solitons.Moreover, the saturation parameter (s) can also influence the … Web7 sep. 2024 · 2. Fundamental types of crystal lattices. Because of the translational symmetry of the crystal lattice, the number of the types of the Bravais lattices can be reduced to 14, which can be further grouped into 7 crystal system: triclinic, monoclinic, orthorhombic, tetragonal, cubic, hexagonal, and the trigonal (rhombohedral). men with neck beards
Fullerene and endometallofullerene Kagome lattices with symmetry …
WebWhen the medium lacks inversion symmetry, the excursions in the positive direction differ from those in the negative direction. The response is not symmetric: the zero crossings are not symmetrically placed, and the … Web21 feb. 2024 · Abstract. The optical PT-symmetric and PT-antisymmetric characteristics are simultaneously investigated in the four-level atoms trapped in one-dimensional and two-dimensional optical lattices.The atoms with Gaussian-distributed density are driven into the closed-loop configuration by a standing wave field, two microwave fields and a probe … WebThe notion of general quasi-overlaps on bounded lattices was introduced as a special class of symmetric n-dimensional aggregation functions on bounded lattices satisfying some bound conditions and which do not need to be continuous. In this paper, we continue developing this topic, this time focusing on another generalization, called general pseudo … men with necklace