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A κ-deformed model of growing complex networks with fitness

Stella, Massimo; Brede, Markus - In: Physica A: Statistical Mechanics and its Applications 407 (2014) C, pp. 360-368

The Barabási–Bianconi (BB) fitness model can be solved by a mapping between the original network growth model to an idealized bosonic gas. The well-known transition to Bose–Einstein condensation in the latter then corresponds to the emergence of “super-hubs” in the network model....

Persistent link: https://www.econbiz.de/10011062373

Dynamical properties of transportation on complex networks

Shen, Bo; Gao, Zi-You - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 5, pp. 1352-1360

performance of networks is introduced, which should be helpful in the design of traffic networks. …

Persistent link: https://www.econbiz.de/10010589288

THE DYNAMICS OF INTERNET TRAFFIC: SELF-SIMILARITY, SELF-ORGANIZATION, AND COMPLEX PHENOMENA

SMITH, REGINALD D. - In: Advances in Complex Systems (ACS) 14 (2011) 06, pp. 905-949

The Internet is one of the largest and most complex communication and information exchange networks ever created. Therefore, its dynamics and traffic unsurprisingly take on a rich variety of complex dynamics, self-organization, and other phenomena that have been researched for years. This paper...

Persistent link: https://www.econbiz.de/10009364750

Community-based complex cloud data center

Filiposka, Sonja; Juiz, Carlos - In: Physica A: Statistical Mechanics and its Applications 419 (2015) C, pp. 356-372

best performance available while keeping overprovisioning and, lately even more important, power consumption, to the … minimum. Aiming to provide a unified solution that will have high performance together with economical benefits and power … comparing the proposed model to other similar solutions we show that the performance of the network in terms of average path …

Persistent link: https://www.econbiz.de/10011117843

Galilean DKP theory and Bose–Einstein condensation

Abreu, L.M.; Gadelha, Alexandre L.; Pimentel, B.M.; … - In: Physica A: Statistical Mechanics and its Applications 419 (2015) C, pp. 612-621

This work is devoted to the development of Galilean Duffin–Kemmer–Petiau (DKP) theory at finite temperature and to the study of Bose–Einstein condensation (BEC). This DKP-like theory is formulated in a 5-dimensional manifold, in which the Galilei-covariant first-order wave equations...

Persistent link: https://www.econbiz.de/10011117892

Creation of excitations from a uniform impurity motion in the condensate

Suzuki, Jun - In: Physica A: Statistical Mechanics and its Applications 397 (2014) C, pp. 40-53

We investigate a phenomenon of creation of excitations in the homogeneous Bose–Einstein condensate due to an impurity moving with a constant velocity. A simple model is considered to take into account dynamical effects due to motions of the impurity. Based on this model, we show that there can...

Persistent link: https://www.econbiz.de/10010738222

Unitarily inequivalent vacua in Bose–Einstein condensation of trapped gases

Okumura, Masahiko; Yamanaka, Yoshiya - In: Physica A: Statistical Mechanics and its Applications 365 (2006) 2, pp. 429-445

We approach the problem of the Bose–Einstein condensation of neutral atoms in an external trap, which is a finite system in size, from the viewpoint of quantum field theory. The phenomenon is considered as a spontaneous symmetry breakdown. The main result of this paper is that the vacua for...

Persistent link: https://www.econbiz.de/10010872274

Reduced dynamics simulation of trapped classical atoms statistics using an interactive lattice automaton model

Hirata, S.C.; Silveira, D.M.; Morgado, W.A.M.; Cruz, M.E.; … - In: Physica A: Statistical Mechanics and its Applications 307 (2002) 1, pp. 107-120

We propose a computationally straightforward method that allows us to successfully study large systems, far from thermal equilibrium, where analytical methods and Molecular Dynamics are not applicable. The main aspect of our method is a reduction of the microscopic dynamics, which should be...

Persistent link: https://www.econbiz.de/10010872483

Reconciling phase diffusion and Hartree–Fock approximation in condensate systems

Giorgi, Gian Luca; de Pasquale, Ferdinando - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 1, pp. 82-86

Despite the weakly interacting regime, the physics of Bose–Einstein condensates is widely affected by particle–particle interactions. They determine quantum phase diffusion, which is known to be the main cause of loss of coherence. Studying a simple model of two interacting Bose systems, we...

Persistent link: https://www.econbiz.de/10010872500

Weakly interacting Bose mixtures at finite temperature

Van Schaeybroeck, Bert - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 17, pp. 3806-3811

Motivated by the recent experiments on Bose–Einstein mixtures with tunable interactions we study repulsive weakly interacting Bose mixtures at finite temperature. We obtain phase diagrams using Hartree–Fock theory which are directly applicable to experimentally trapped systems. Almost all...

Persistent link: https://www.econbiz.de/10010872916