scholarly journals Probing the stability of the spin-liquid phases in the Kitaev-Heisenberg model using tensor network algorithms

2014 ◽  
Vol 90 (19) ◽  
Author(s):  
Juan Osorio Iregui ◽  
Philippe Corboz ◽  
Matthias Troyer
Keyword(s):  
Heisenberg Model ◽  
Spin Liquid ◽  
Network Algorithms ◽  
Liquid Phases ◽  
Tensor Network ◽  
The Stability

scholarly journals Variation principle in calculating the flow of a two-phase mixture in the pipes of the cooling systems in high-rise buildings

2018 ◽  
Vol 33 ◽  
pp. 02063 ◽  
Author(s):  
Andrey Aksenov ◽  
Anna Malysheva
Keyword(s):  
Channel Cross Section ◽  
Variation Principle ◽  
Two Phase ◽  
Liquid Phases ◽  
Rate Of Increase ◽  
Annular Layer ◽  
Gas Liquid Flow ◽  
The Stability ◽  
Air Conditioning Systems ◽  
Physical Laws

The analytical solution of one of the urgent problems of modern hydromechanics and heat engineering about the distribution of gas and liquid phases along the channel cross-section, the thickness of the annular layer and their connection with the mass content of the gas phase in the gas-liquid flow is given in the paper.The analytical method is based on the fundamental laws of theoretical mechanics and thermophysics on the minimum of energy dissipation and the minimum rate of increase in the system entropy, which determine the stability of stationary states and processes. Obtained dependencies disclose the physical laws of the motion of two-phase media and can be used in hydraulic calculations during the design and operation of refrigeration and air conditioning systems.

THE DISAPPEARANCE OF TWO-DIMENSIONAL LONG RANGE ORDER IN THE HEISENBERG MODEL WITH COMPETING INTERACTIONS

1990 ◽  
Vol 04 (15n16) ◽  
pp. 2319-2333 ◽  
Author(s):  
A. F. BARABANOV ◽  
L. A. MAKSIMOV ◽  
O. A. STARYKH
Keyword(s):  
Long Range ◽  
Heisenberg Model ◽  
Spin Correlation ◽  
Range Order ◽  
Square Lattice ◽  
Spin Excitation ◽  
Spin Liquid ◽  
Long Range Order ◽  
Competing Interactions ◽  
Nearest Neighbours

In the frustrated Heisenberg model with first (J1) and second (J2) nearest neighbours interactions on a square lattice the transition from the long range order state (LROS) to spin liquid state (SLS) is found at α = J1/J2 ≅ 0.25. SLS is characterized by the gap in spin excitation spectrum at T = 0 and, hence, by exponential decay of spin correlation function at large distance. As a result, correlation length is temperature independent in SLS in accordance with neutron experiments on doped La 2 CuO 4.

scholarly journals Magnetic and spin-liquid phases in the frustrated t−t′ Hubbard model on the triangular lattice

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
Luca F. Tocchio ◽  
Arianna Montorsi ◽  
Federico Becca
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Spin Liquid ◽  
Liquid Phases

A Theoretical Discussion of a Menisci Micropump Driven by an Electric Field

2006 ◽  
Vol 129 (4) ◽  
pp. 404-411 ◽  
Author(s):  
Alexandru Herescu ◽  
Jeffrey S. Allen
Keyword(s):  
Electric Field ◽  
Fluid Motion ◽  
Liquid Interfaces ◽  
Vapor Bubbles ◽  
Liquid Phases ◽  
The Stability ◽  
Novel Concept ◽  
Enhanced Boiling ◽  
Stability Limits ◽  
Induced Dipoles

The potential for miniaturization of analytical devices made possible by advances in micro-fabrication technology is driving demand for reliable micropumps. A wide variety of micropumps exist with many types of actuating mechanisms. One such mechanism is electrohydrodynamic (EHD) forces which rely upon Coulomb forces on free charges and/or polarization forces on induced dipoles within the liquid to induce fluid motion. EHD has been used to pump liquid phases and to displace gas–liquid interfaces for enhanced boiling heat transfer as well as to displace gas/vapor bubbles. A novel concept for using EHD polarization forces to deflect a stationary meniscus in order to compress and pump a gaseous phase is described. The pumping mechanism consists in alternative compression of two gas volumes by continuous deflection of the two pinned menisci of an entrapped liquid slug in an electric field. Using the Maxwell stress relations, the electric field strength necessary to operate the pump is determined. The operational limits are determined by analyzing the stability limits of the two menisci from inertial and viscous standpoints, corroborated with the natural frequencies of the gas–liquid interfaces.

scholarly journals Spin liquid phases of large-spin Mott insulating ultracold bosons

2016 ◽  
Vol 93 (9) ◽  
Author(s):  
Todd C. Rutkowski ◽  
Michael J. Lawler
Keyword(s):  
Spin Liquid ◽  
Liquid Phases ◽  
Large Spin
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