The effect of an external magnetic field on the MLRO in the global ground states of some antiferromagnetic models

1994 ◽  
Vol 27 (12) ◽  
pp. 4043-4048 ◽  
Author(s):  
Guang-Shan Tian
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Ground States

Entanglement distribution in a two-dimensional 5-site frustrated J1−J2 spin system

2015 ◽  
Vol 13 (06) ◽  
pp. 1550047 ◽  
Author(s):  
Mojtaba Jafarpour ◽  
Soghra Ghanavati ◽  
Davood Afshar
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Ground States ◽  
Quantum Information Theory ◽  
Specific Class ◽  
Two Dimensional ◽  
Bipartite Entanglement ◽  
Separable States ◽  
Entanglement Distribution ◽  
Entanglement Structure

We have studied several ground states and their entanglement structure for a two-dimensional 5-site frustrated [Formula: see text]–[Formula: see text] system in the presence and absence of an external magnetic field. We have used concurrence as a measure of bipartite entanglement and the Meyer–Wallach measure and its generalizations as the measures of multipartite entanglement. They provide a total of eight measures which lead to 30 entanglement quantities for each possible ground state. Computing these 30 quantities for several ground states, we have provided a detailed exposition of the entanglement distribution in each state. We have also categorized them into separable states, not showing entanglement for any bipartition; globally-entangled states, showing entanglement for all the bipartitions, and the states in between. It turns out that by adjusting the external magnetic field, conditioned on the values of the interaction parameters, one may generate specific ground states belonging to a specific class, appropriate for specific tasks in quantum information theory.

RECOIL IMPLANTATION MÖSSBAUER EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-445-C1-445
Author(s):  
G. Langouche ◽  
N. S. Dixon ◽  
L. Gettner ◽  
S. S. Hanna
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Recoil Implantation
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