On single-copy entanglement

Abstract

The largest eigenvalue of the reduced density matrix for quantum chains is shown to have a simple physical interpretation and power-law behaviour in critical systems. This is verified numerically for XXZ spin chains.

4 pages, 2 figures, note added, typo corrected

References in corpus (4)

• Entanglement in XY Spin Chain
• On the entanglement entropy for a XY spin chain
• Single-copy entanglement in critical spin chains
• Entanglement entropy in a boundary impurity model

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• Universal corrections to scaling for block entanglement in spin-1/2 XX chains
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