Results 1 to 10 of about 937,218 (193)

Dimensional crossover in quantum critical metallic magnets [PDF]

Phys. Rev. B 78, 235118 (2008), 2008
Nearly magnetic metals often have layered lattice structures, consisting of coupled planes. In such a situation, physical properties will display, upon decreasing temperature or energy, a dimensional crossover from two-dimensional (2d) to three-dimensional (3d) behavior, which is particularly interesting near quantum criticality.
arxiv   +1 more source

Crossover from Self--Similar to Self--Affine Structures in Percolation [PDF]

Europhys. Lett. 26 (1994) 413, 1994
We study the crossover from self--similar scaling behavior to asymptotically self--affine (anisotropic) structures. As an example, we consider bond percolation with one preferred direction. Our theory is based on a field--theoretical representation, and takes advantage of a renormalization group approach designed for crossover phenomena.
arxiv   +1 more source

Band-edge BCS-BEC crossover in a two-band superconductor: physical properties and detection parameters [PDF]

Supercond. Sci. Technol. 27, 124002 (2014), 2014
Superconductivity in iron-based, magnesium diborides, and other novel superconducting materials has a strong multi-band and multi-gap character. Recent experiments support the possibillity for a BCS-BEC crossover induced by strong-coupling and proximity of the chemical potential to the band edge of one of the bands.
arxiv   +1 more source

Crossover phenomena in spin models with medium-range interactions and self-avoiding walks with medium-range jumps [PDF]

Phys.Rev. E64 (2001) 046130, 2001
We study crossover phenomena in a model of self-avoiding walks with medium-range jumps, that corresponds to the limit $N\to 0$ of an $N$-vector spin system with medium-range interactions. In particular, we consider the critical crossover limit that interpolates between the Gaussian and the Wilson-Fisher fixed point.
arxiv   +1 more source

Crossover behavior in interface depinning [PDF]

, 2014
We study the crossover scaling behavior of the height-height correlation function in interface depinning in random media. We analyze experimental data from a fracture experiment and simulate an elastic line model with non-linear couplings and disorder. Both exhibit a crossover between two different universality classes.
arxiv   +1 more source

On Crossover Distance for Optical Wireless Satellite Networks and Optical Fiber Terrestrial Networks [PDF]

arXiv, 2022
Optical wireless satellite networks (OWSNs) can provide lower latency data communications compared to optical fiber terrestrial networks (OFTNs). The crossover function enables to calculate the crossover distance for an OWSN and an OFTN. If the distance between two points on Earth is greater than the crossover distance, then switching or crossing over ...
arxiv  

Influence of Binomial Crossover on Approximation Error of Evolutionary Algorithms [PDF]

arXiv, 2021
Although differential evolution (DE) algorithms perform well on a large variety of complicated optimization problems, only a few theoretical studies are focused on the working principle of DE algorithms. To make the first attempt to reveal the function of binomial crossover, this paper aims to answer whether it can reduce the approximation error of ...
arxiv  

Crossover from the parity-conserving pair contact process with diffusion to other universality classes [PDF]

PRE 79, 056115 (2009), 2009
The pair contact process with diffusion (PCPD) with modulo 2 conservation (\pcpdt) [$2A\to 4A$, $2A\to 0$] is studied in one dimension, focused on the crossover to other well established universality classes: the directed Ising (DI) and the directed percolation (DP).
arxiv   +1 more source

Crossover in dynamics in the Kob-Andersen binary mixture glass-forming liquid [PDF]

arXiv, 2022
Glass-forming liquids are broadly classified as being fragile or strong, depending on the deviation from Arrhenius behavior of their relaxation times. A fragile to strong crossover is observed or inferred in liquids like water and silica, and more recently also in metallic glasses and phase change alloys, leading to the expectation that such a ...
arxiv  

Bogoliubov spectrum of a cigar shaped Fermi superfluid in an optical lattice at the BEC-BCS crossover [PDF]

Journal of physics B, vol. 40, 4453 (2007), 2007
We study the Bogoliubov spectrum of an elongated Fermi superfluid confined in an one-dimensional superfluid along the Bose-Einstein-condensate (BEC)-Bardeen-Cooper-Schrieffer (BCS) crossover. We derive analytic expressions for the sound velocity, effective mass and the Bogoliubov excitation spectrum of the axial quasiparticles long the crossover based ...
arxiv   +1 more source