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Trapped Ion Quantum Computing

A quantum topological phase transition at the microscopic level

arXiv
Authors: C. Castelnovo, C. Chamon

Year

2007

Paper ID

49670

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

Abstract

We study a quantum phase transition between a phase which is topologically ordered and one which is not. We focus on a spin model, an extension of the toric code, for which we obtain the exact ground state for all values of the coupling constant that takes the system across the phase transition. We compute the entanglement and the topological entropy of the system as a function of this coupling constant, and show that the topological entropy remains constant all the way up to the critical point, and jumps to zero beyond it. Despite the jump in the topological entropy, the transition is second order as detected via any local observable.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2007 reference point for readers tracking recent quantum research.
  • We study a quantum phase transition between a phase which is topologically ordered and one which is not.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0707.2084 [2] arXiv https://arxiv.org/abs/0707.2084 [3] Publisher https://arxiv.org/abs/0707.2084

Local Citation Graph (Related-Paper Links)

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