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Entanglement at the quantum phase transition in a harmonic lattice

Abstract:

The entanglement properties of phase transition in a twodimensional harmonic lattice, similar to the one observed in recent ion trap experiments, are discussed for both finite number of particles and thermodynamical limit. We show that for the ground state at the critical value of the trapping potential, two entanglement measures, the negativity between two neighbouring sites and the block entropy for blocks of size 1, 2 and 3, change abruptly. Entanglement thus indicates quantum phase transi...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1367-2630/12/2/025017

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
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Funding agency for:
Vedral, V
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Funding agency for:
Vedral, V
Publisher:
IOP Publishing Publisher's website
Journal:
New Journal of Physics Journal website
Volume:
12
Issue:
2
Article number:
025017
Publication date:
2010-02-01
DOI:
EISSN:
1367-2630
ISSN:
1367-2630
Source identifiers:
158766
Language:
English
UUID:
uuid:6b47c585-9207-4329-be4a-97d220d9ef66
Local pid:
pubs:158766
Deposit date:
2012-12-19

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