scholarly journals Low-dimensional long-range topological charge structure in the QCD vacuum

2003 ◽  
Vol 68 (11) ◽  
Author(s):  
I. Horváth ◽  
S. J. Dong ◽  
T. Draper ◽  
F. X. Lee ◽  
K. F. Liu ◽  
...  
Keyword(s):  
Long Range ◽  
Topological Charge ◽  
Charge Structure ◽  
Qcd Vacuum ◽  
Low Dimensional

scholarly journals Low-dimensional long-range topological structure in the QCD vacuum

2004 ◽  
Vol 129-130 ◽  
pp. 677-679 ◽  
Author(s):  
I. Horváth ◽  
S.J. Dong ◽  
T. Draper ◽  
F.X. Lee ◽  
K.F. Liu ◽  
...  
Keyword(s):  
Long Range ◽  
Topological Structure ◽  
Qcd Vacuum ◽  
Low Dimensional

scholarly journals Coexistence of long-range orders in low-dimensional systems

2018 ◽  
Vol 91 (9) ◽  
Author(s):  
Sudhakar Yarlagadda ◽  
Peter B. Littlewood
Keyword(s):  
Long Range ◽  
Low Dimensional

DOMAIN WALL NETWORK AS QCD VACUUM: CORRELATION FUNCTIONS AND CONFINEMENT OF STATIC QUARKS

2019 ◽  
pp. 38-47
Author(s):  
V.A. Tainov
Keyword(s):  
Topological Charge ◽  
Wilson Loop ◽  
Domain Model ◽  
Physical Vacuum ◽  
Qcd Vacuum ◽  
Almost Everywhere ◽  
Vacuum Fields ◽  
Point Correlation ◽  
Point Correlation Function ◽  
Area Law

Within the domain model of QCD vacuum the properties of a statistical ensemble of almost everywhere homogeneous Abelian (anti-)self-dual gluon fields representing the physical vacuum of quantum chromodynamics are investigated. The two-point correlation function of the topological charge density is calculated and the topological susceptibility is found. It is shown that such vacuum fields ensure the implementation of the area law for the Wilson loop, i.e. the confinement of static quarks.

scholarly journals Long-range focusing of magnetic bound states in superconducting lanthanum

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Howon Kim ◽  
Levente Rózsa ◽  
Dominik Schreyer ◽  
Eszter Simon ◽  
Roland Wiesendanger
Keyword(s):  
Long Range ◽  
Bound States ◽  
Theoretical Calculations ◽  
Surface States ◽  
Magnetic Interactions ◽  
Magnetic Impurities ◽  
Natural Choice ◽  
Temperature Scanning ◽  
Quantum Mechanical Systems ◽  
Low Dimensional

Abstract Quantum mechanical systems with long-range interactions between quasiparticles provide a promising platform for coherent quantum information technology. Superconductors are a natural choice for solid-state based quantum devices, while magnetic impurities inside superconductors give rise to quasiparticle excitations of broken Cooper pairs that provide characteristic information about the host superconductor. Here, we reveal that magnetic impurities embedded below a superconducting La(0001) surface interact via quasiparticles extending to very large distances, up to several tens of nanometers. Using low-temperature scanning probe techniques, we observe the corresponding anisotropic and giant oscillations in the LDOS. Theoretical calculations indicate that the quasi-two-dimensional surface states with their strongly anisotropic Fermi surface play a crucial role for the focusing and long-range extension of the magnetic bound states. The quasiparticle focusing mechanism should facilitate the design of versatile magnetic structures with tunable and directed magnetic interactions over large distances, thereby paving the way toward the design of low-dimensional magnet–superconductor hybrid systems exhibiting topologically non-trivial quantum states as possible elements of quantum computation schemes based on Majorana quasiparticles.

Mn(dca)2(o-phen) {dca=dicyanamide; o-phen=1,10-phenanthroline}: Long-range magnetic order in a low-dimensional Mn-dca polymer

Polyhedron ◽  
2013 ◽  
Vol 52 ◽  
pp. 679-688 ◽  
Author(s):  
Jamie L. Manson ◽  
Craig M. Brown ◽  
Qing Huang ◽  
John A. Schlueter ◽  
Tom Lancaster ◽  
...  
Keyword(s):  
Long Range ◽  
Magnetic Order ◽  
Range Magnetic Order ◽  
Low Dimensional ◽  
Long Range Magnetic Order

scholarly journals Eta Prime Gluonic Contribution to the Nucleon Self-Energy in an Effective Theory

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
A. Upadhyay ◽  
J. P. Singh
Keyword(s):  
Charge Density ◽  
Topological Charge ◽  
Form Factors ◽  
Heavy Baryon ◽  
Effective Theory ◽  
Nucleon Mass ◽  
Total Contribution ◽  
Self Energy ◽  
Qcd Vacuum ◽  
The One

We estimate a possibleη′gluonic contribution to the self-energy of a nucleon in an effective theory. The couplings of the topological charge density to nucleons give rise to OZI violatingη′-nucleon interactions. The one-loop self-energy of nucleon arising due to these interactions is studied using a heavy baryon chiral perturbation theory. The divergences have been removed using appropriate form factors. The nontrivial structure of the QCD vacuum has also been taken into account. The numerical results are sensitive to the choice of the regulator to a nonnegligible extent. We get the total contribution to the nucleon mass coming from its interaction with the topological charge densityδmtot≅-(2.5–7.5)% of the nucleon mass.

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