An observable entanglement measure for unknown mixed quantum states

Andreas Buchleitner; Florian Mintert

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An observable entanglement measure for unknown mixed quantum states

Florian Mintert, Andreas Buchleitner

Quantum Physics · Submitted 31 May 2006

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy.

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arXiv IDquant-ph/0605250 (version 3)

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CitationAndreas Buchleitner, Florian Mintert. "An observable entanglement measure for unknown mixed quantum states." arXiv:quant-ph/0605250 (2006). https://pith.science/paper/QZRWIFEO

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What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.08 · human participants 0.02 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.08 · compares with prior results 0.05 · mentions code or data availability 0.02.

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We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy.

background contribution method result interpretation main claim

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy.	contribution 0.91	0.91	0.90	asserted 1.00

What kind of paper the classifier reports this is: method or tool 0.88 · evidence from proof or derivation 0.92.

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The paper

Original abstract

We show how an unknown mixed quantum state's entanglement can be quantified by a suitable, local parity measurement on its two-fold copy.

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References

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

The Inverse Eigenvalue Problem for Partial Transposes of Two-Qubit States
quant-ph 2026-08 accept novelty 8.0 of 10

For two qubits, an ordered candidate eigenvalue list (x,y,z,-q) with x≥y≥z≥0, q>0, and x+y+z-q=1 is realizable as the partial-transpose spectrum of a density operator if and only if q ≤ y and qy ≤ xz.
General construction of noiseless networks detecting entanglement with help of linear maps
quant-ph 2006-03 reject novelty 6.0 of 10

A noiseless network can estimate the spectrum of Θ(ρ) for any Hermiticity-preserving map Θ, giving a general entanglement-detection method for positive-map criteria.

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2 arXiv papers cite this in 2 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 1 sentence without a confident label

Cites it as background 1 paper

Local parity measurements on two copies are standard in multicopy entanglement protocols [ref] .

The Inverse Eigenvalue Problem for Partial Transposes of Two-Qubit States · Qubit–qudit extensions · 0.86

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