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Experimental measurement of nonlinear entanglement witness by hyper-entangling two-qubit states

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Vojtěch Trávníček, Karol Bartkiewicz, Antonín Černoch, Karel Lemr

Quantum Physics · Submitted 29 May 2018

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

The authors' main claim Our results indicate that hyper-entanglement can be used for quick entanglement detection and it provides a practical testbed for experiments with non-linear entanglement witnesses.

how it is stated · hedged possibility 0.97 read the record →

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arXiv ID1805.11337 (version 1)
Pith IDIQSM2MQK, Pith's permanent record of this paper and its review
CitationAnton\'in \v{C}ernoch, Karel Lemr, Karol Bartkiewicz, Vojt\v{e}ch Tr\'avn\'i\v{c}ek. "Experimental measurement of nonlinear entanglement witness by hyper-entangling two-qubit states." arXiv:1805.11337 (2018). https://pith.science/paper/IQSM2MQK
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,593 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.10 · human participants 0.02 · controlled comparison 0.07 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.43 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

We demonstrate that non-linear entanglement witnesses can be made particularly useful for entanglement detection in hyper-entangled or multilevel states. We test this idea experimentally on the platform of linear optics using a hyper-entangled state of two photons. Instead of several simultaneous copies of two-photon entangled states, one can directly measure the witness on single copy of a hyper-entangled state. Our results indicate that hyper-entanglement can be used for quick entanglement detection and it provides a practical testbed for experiments with non-linear entanglement witnesses.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We demonstrate that non-linear entanglement witnesses can be made particularly useful for entanglement detection in hyper-entangled or multilevel states. contribution 0.71 0.63 0.59 asserted 0.97
s1 We test this idea experimentally on the platform of linear optics using a hyper-entangled state of two photons. method 0.78 0.95 0.07 asserted 1.00
s2 Instead of several simultaneous copies of two-photon entangled states, one can directly measure the witness on single copy of a hyper-entangled state. method 0.45 0.58 0.26 hedged possibility 0.51
s3 Our results indicate that hyper-entanglement can be used for quick entanglement detection and it provides a practical testbed for experiments with non-linear entanglement witnesses. interpretation 0.99 0.87 0.73 hedged possibility 0.97

What kind of paper the classifier reports this is: empirical study 0.99 · evidence from observation or experiment 1.00.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

We demonstrate that non-linear entanglement witnesses can be made particularly useful for entanglement detection in hyper-entangled or multilevel states. We test this idea experimentally on the platform of linear optics using a hyper-entangled state of two photons. Instead of several simultaneous copies of two-photon entangled states, one can directly measure the witness on single copy of a hyper-entangled state. Our results indicate that hyper-entanglement can be used for quick entanglement detection and it provides a practical testbed for experiments with non-linear entanglement witnesses.

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