scholarly journals Quantum trajectories of interacting pseudo-spin networks

1998 ◽  
Vol 67 (6) ◽  
pp. 733-741 ◽  
Author(s):  
C.M. Granzow ◽  
G. Mahler
Keyword(s):  
Quantum Trajectories ◽  
Spin Networks

scholarly journals Magnetisation Processes in Geometrically Frustrated Spin Networks with Self-Assembled Cliques

Entropy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 336 ◽  
Author(s):  
Bosiljka Tadić ◽  
Miroslav Andjelković ◽  
Milovan Šuvakov ◽  
Geoff J. Rodgers
Keyword(s):  
Domain Walls ◽  
Spin Dynamics ◽  
Higher Order ◽  
Spin Networks ◽  
Graph Theoretic ◽  
Geometrically Frustrated ◽  
Geometric Frustration ◽  
Antiferromagnetic Materials ◽  
Geometrically Constrained ◽  
Ferromagnetic Interactions

Functional designs of nanostructured materials seek to exploit the potential of complex morphologies and disorder. In this context, the spin dynamics in disordered antiferromagnetic materials present a significant challenge due to induced geometric frustration. Here we analyse the processes of magnetisation reversal driven by an external field in generalised spin networks with higher-order connectivity and antiferromagnetic defects. Using the model in (Tadić et al. Arxiv:1912.02433), we grow nanonetworks with geometrically constrained self-assemblies of simplexes (cliques) of a given size n, and with probability p each simplex possesses a defect edge affecting its binding, leading to a tree-like pattern of defects. The Ising spins are attached to vertices and have ferromagnetic interactions, while antiferromagnetic couplings apply between pairs of spins along each defect edge. Thus, a defect edge induces n − 2 frustrated triangles per n-clique participating in a larger-scale complex. We determine several topological, entropic, and graph-theoretic measures to characterise the structures of these assemblies. Further, we show how the sizes of simplexes building the aggregates with a given pattern of defects affects the magnetisation curves, the length of the domain walls and the shape of the hysteresis loop. The hysteresis shows a sequence of plateaus of fractional magnetisation and multiscale fluctuations in the passage between them. For fully antiferromagnetic interactions, the loop splits into two parts only in mono-disperse assemblies of cliques consisting of an odd number of vertices n. At the same time, remnant magnetisation occurs when n is even, and in poly-disperse assemblies of cliques in the range n ∈ [ 2 , 10 ] . These results shed light on spin dynamics in complex nanomagnetic assemblies in which geometric frustration arises in the interplay of higher-order connectivity and antiferromagnetic interactions.

scholarly journals Quantum trajectories face a transition

Physics ◽  
2010 ◽  
Vol 3 ◽  
Author(s):  
David Andrieux
Keyword(s):  
Quantum Trajectories

scholarly journals Quantum trajectories for the realistic measurement of a solid-state charge qubit

2005 ◽  
Vol 71 (16) ◽  
Author(s):  
Neil P. Oxtoby ◽  
P. Warszawski ◽  
H. M. Wiseman ◽  
He-Bi Sun ◽  
R. E. S. Polkinghorne
Keyword(s):  
Solid State ◽  
Quantum Trajectories ◽  
Charge Qubit ◽  
State Charge

scholarly journals Entanglement Dynamics in Open Two-Qubit Systems via Diffusive Quantum Trajectories

2010 ◽  
Vol 105 (21) ◽  
Author(s):  
Carlos Viviescas ◽  
Ivonne Guevara ◽  
André R. R. Carvalho ◽  
Marc Busse ◽  
Andreas Buchleitner
Keyword(s):  
Quantum Trajectories ◽  
Entanglement Dynamics

scholarly journals Lifting SU(2) spin networks to projected spin networks

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Maïté Dupuis ◽  
Etera R. Livine
Keyword(s):  
Spin Networks

Quantum trajectories and the Bohm time constant

2013 ◽  
Vol 331 ◽  
pp. 317-322 ◽  
Author(s):  
Antonio B. Nassar
Keyword(s):  
Time Constant ◽  
Quantum Trajectories

Subspace controllability of symmetric spin networks

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
Jiahui Chen ◽  
Yehao Zhou ◽  
Ji Bian ◽  
Jun Li ◽  
Xinhua Peng
Keyword(s):  
Spin Networks
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