Results 41 to 50 of about 2,678,219 (375)
Fermion quartets on the square lattice
Physical Review B, 2023 We study a microscopic model for four spinless fermions on the square lattice which exhibits a quartet bound state in the strong coupling regime. The four-particle quantum states are analyzed using symmetry arguments and by introducing a zoo of relevant lattice animals. These considerations, as well as variational and exact diagonalization calculations
Dionys Baeriswyl +2 more
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Polarization Converter Based on Square Lattice Photonic Crystal Fiber with Double-Hole Units
Crystals, 2019 In this study, a novel polarization converter (PC) based on square lattice photonic crystal fiber (PCF) is proposed and analyzed. For each square unit in the cladding, two identical circular air holes are arranged symmetrically along the y = x ...
Zejun Zhang +3 more
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Band gap engineering in simultaneous phononic and photonic crystal slabs [PDF]
, 2010 We discuss the simultaneous existence of phononic and photonic band gaps in two types of phononic crystals slabs, namely periodic arrays of nanoholes in a Si membrane and of Si nanodots on a SiO2 membrane. In the former geometry, we investigate in detail
Akjouj, A. +7 more
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Adsorption of line segments on a square lattice [PDF]
Physical Review E, 1994 We study the deposition of line segments on a two-dimensional square lattice. The estimates for the coverage at jamming obtained by Monte-Carlo simulations and by $7^{th}$-order time-series expansion are successfully compared. The non-trivial limit of adsorption of infinitely long segments is studied, and the lattice coverage is consistently obtained ...
Y. Leroyer +4 more
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Folding the square-diagonal lattice [PDF]
Nuclear Physics B, 1998 We study the problem of "phantom" folding of the two-dimensional square lattice, in which the edges and diagonals of each face can be folded. The non-vanishing thermodynamic folding entropy per face $s \simeq .2299(1)$ is estimated both analytically and numerically, by successively mapping the model onto a dense loop model, a spin model and a new 28 ...
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Quantum compass model on the square lattice [PDF]
Physical Review B, 2005 8 pages, 8 ...
DORIER J, BECCA F, MILA F
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AIP Advances, 2018 The S = 1/2 Heisenberg antiferromagnet on the two-dimensional pyramid lattice is studied by the numerical-diagonalization method. This lattice is obtained by the combination of the Lieb lattice and the square lattice. It is known that when interaction on
Toru Sakai, Hiroki Nakano
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Interplay of Spin and Spatial Anisotropy in Low-Dimensional Quantum Magnets with Spin 1/2
Crystals, 2018 Quantum Heisenberg chain and square lattices are important paradigms of a low-dimensional magnetism. Their ground states are determined by the strength of quantum fluctuations.
Alžbeta Orendáčová +5 more
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Infection spreading and recovery in a square lattice [PDF]
Physical Review E, 2020 Accepted in Physical Review ...
Nandadulal Bairagi +5 more
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Extension of the spin-1/2 frustrated square lattice model: the case of layered vanadium phosphates [PDF]
, 2009 We study the influence of the spin lattice distortion on the properties of frustrated magnetic systems and consider the applicability of the spin-1/2 frustrated square lattice model to materials lacking tetragonal symmetry.
A. P. Ramirez +6 more
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