scholarly journals Active and finite-size particles in decaying quantum turbulence at low temperature

2020 ◽  
Vol 5 (5) ◽  
Author(s):  
Umberto Giuriato ◽  
Giorgio Krstulovic
Keyword(s):  
Low Temperature ◽  
Quantum Turbulence ◽  
Finite Size

scholarly journals Macroscopic degeneracy and order in the 3D plaquette Ising model

2015 ◽  
Vol 29 (20) ◽  
pp. 1550109 ◽  
Author(s):  
Desmond A. Johnston ◽  
Marco Mueller ◽  
Wolfhard Janke
Keyword(s):  
Low Temperature ◽  
Magnetic Order ◽  
Finite Size ◽  
Temperature Phase ◽  
Finite Size Scaling ◽  
First Order ◽  
Magnetic Order Parameter ◽  
First Order Transition ◽  
Definition Of ◽  
Low Temperature Phase

The purely plaquette 3D Ising Hamiltonian with the spins living at the vertices of a cubic lattice displays several interesting features. The symmetries of the model lead to a macroscopic degeneracy of the low-temperature phase and prevent the definition of a standard magnetic order parameter. Consideration of the strongly anisotropic limit of the model suggests that a layered, “fuki-nuke” order still exists and we confirm this with multi-canonical simulations. The macroscopic degeneracy of the low-temperature phase also changes the finite-size scaling corrections at the first-order transition in the model and we see this must be taken into account when analyzing our measurements.

scholarly journals TESTING BOUNDARY CONDITIONS EFFICIENCY IN SIMULATIONS OF LONG-RANGE INTERACTING MAGNETIC MODELS

2004 ◽  
Vol 15 (01) ◽  
pp. 115-127 ◽  
Author(s):  
SERGIO A. CANNAS ◽  
CINTIA M. LAPILLI ◽  
DANIEL A. STARIOLO
Keyword(s):  
Low Temperature ◽  
Boundary Conditions ◽  
Size Effects ◽  
Periodic Boundary ◽  
Finite Size ◽  
Periodic Boundary Conditions ◽  
Ferromagnetic Phase ◽  
Temperature Phase ◽  
Finite Size Effects ◽  
Magnetic Systems

Periodic boundary conditions have no unique implementation in magnetic systems where all spins interact with each other through a power law decaying interaction of the form 1/rα, r being the distance between spins. In this work we present a comparative study of the finite size effects oberved in numerical simulations by using first image and infinite image periodic boundary conditions in one- and two-dimensional spin systems with those interactions, including the ferromagnetic, anti-ferromagnetic and competitive interaction cases. Our results show no significative differences between the finite size effects produced by both boundary conditions when the low temperature phase has zero global magnetization, and it depends on the ratio α/d for systems with a low temperature ferromagnetic phase. In the last case the first image convention gives more stronger finite size effects than the other when the system enters into the classical regime α/d≤3/2.

scholarly journals Specific Heat Behavior in the Kondo Lattice Model With Hybridization Interaction Under Low Temperature Regimes

2018 ◽  
Vol 14 (6) ◽  
pp. 405
Author(s):  
Okunzuwa I.S ◽  
Arthur I. I Ejere ◽  
Oni-Ojo E. Amenaghawon ◽  
Aigbekaen E. Eddy
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Lattice Model ◽  
Heavy Fermion ◽  
Finite Size ◽  
Kondo Lattice ◽  
Size Analysis ◽  
Temperature Regimes ◽  
Kondo Lattice Model ◽  
Insight Into

A finite size analysis of the Kondo lattice model with hybridization interaction between localized and extended orbitals using the exact diagonalization technique has brought more insight into the specific heat behavior of the heavy fermion (HF) systems under low temperature regimes. The specific heat under the antiferromagnetic region of temperatures below 3k is lower than that of the ferromagnetic region. While the specific heat for temperatures above 4k, shows a reversed trend.

Low Temperature Experimental Investigation of Finite-Size and Surface Effects in CuFe2O4 Nanoparticles of Ferrofluids

2004 ◽  
Vol 20-21 ◽  
pp. 694-699 ◽  
Author(s):  
Carlucio R. Alves ◽  
R. Aquino ◽  
M.H. Sousa ◽  
Hercílio R. Rechenberg ◽  
Gerardo F. Goya ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Low Temperature ◽  
Finite Size ◽  
Surface Effects

CRITICAL FLUCTUATIONS IN 2D XY MAGNETS

Fractals ◽  
2003 ◽  
Vol 11 (supp01) ◽  
pp. 73-80 ◽  
Author(s):  
M. SELLITTO ◽  
P. C. W. HOLDSWORTH
Keyword(s):  
Simple Model ◽  
Low Temperature ◽  
Complex Systems ◽  
Turbulent Flow ◽  
Disordered Systems ◽  
Finite Size ◽  
Magnetic Fluctuations ◽  
Critical Fluctuations ◽  
New Ideas ◽  
Aging Phenomena

We give a review of the properties of low-temperature magnetic fluctuations in a finite-size 2D XY system. The behavior of such a simple model closely resembles that of several complex systems, notably the spectrum of power fluctuations in enclosed turbulent flow and interface width in surface growth problems. It suggests moreover new ideas in the study of aging phenomena in disordered systems.

An introduction to quantum turbulence

2008 ◽  
Vol 366 (1877) ◽  
pp. 2925-2933 ◽  
Author(s):  
W.F Vinen
Keyword(s):  
Low Temperature ◽  
Rotational Motion ◽  
Quantum Turbulence ◽  
Cosmic Strings ◽  
Topological Defects ◽  
Dynamical Behaviour ◽  
Quantized Vortices ◽  
Superfluid Component ◽  
Very Low Temperature

This paper provides a brief introduction to quantum turbulence in simple superfluids, in which the required rotational motion in the superfluid component is due entirely to the topological defects that are identified as quantized vortices. Particular emphasis is placed on the basic dynamical behaviour of the quantized vortices and on turbulent decay mechanisms at a very low temperature. There are possible analogies with the behaviour of cosmic strings.

scholarly journals Transition to quantum turbulence in finite-size superfluids

2011 ◽  
Vol 8 (5) ◽  
pp. 393-397 ◽  
Author(s):  
R.F. Shiozaki ◽  
G.D. Telles ◽  
V.I. Yukalov ◽  
V.S. Bagnato
Keyword(s):  
Quantum Turbulence ◽  
Finite Size
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