Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement and level crossings in frustrated ferromagnetic rings   We study the entanglement content of a class of mesoscopic tunable magnetic
systems. The systems are closed finite spin-1/2 chains with ferromagnetic
nearest-neighbor interactions frustrated by antiferromagnetic
next-nearest-neighbor interactions. The finite chains display a series of level
crossings reflecting the incommensurate physics of the corresponding
infinite-size chain. We present dramatic entanglement signatures characterizing
these unusual level crossings. We focus on multi-spin and global measures of
entanglement rather than only one-spin or two-spin entanglements. We compare
and contrast the information obtained from these measures to that obtained from
traditional condensed matter measures such as correlation functions.

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The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
2
The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ