Complementarity reveals bound entanglement of two twisted photons
We demonstrate the detection of bipartite bound entanglement as predicted by the Horodecki's in 1998. Bound entangled states, being heavily mixed entangled quantum states, can be produced by incoherent addition of pure entangled states. Until 1998 it was thought that such mixing could always be...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/8/083036 |
| _version_ | 1797751392589316096 |
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| author | Beatrix C Hiesmayr Wolfgang Löffler |
| author_facet | Beatrix C Hiesmayr Wolfgang Löffler |
| author_sort | Beatrix C Hiesmayr |
| collection | DOAJ |
| description | We demonstrate the detection of bipartite bound entanglement as predicted by the Horodecki's in 1998. Bound entangled states, being heavily mixed entangled quantum states, can be produced by incoherent addition of pure entangled states. Until 1998 it was thought that such mixing could always be reversed by entanglement distillation; however, this turned out to be impossible for bound entangled states. The purest form of bound entanglement is that of only two particles, which requires higher-dimensional ( d > 2) quantum systems. We realize this using photon qutrit ( d = 3) pairs produced by spontaneous parametric downconversion, that are entangled in the orbital angular momentum degrees of freedom, which is scalable to high dimensions. Entanglement of the photons is confirmed via a ‘maximum complementarity protocol’. This conceptually simple protocol requires only maximized complementary of measurement bases; we show that it can also detect bound entanglement. We explore the bipartite qutrit space and find that, also experimentally, a significant portion of the entangled states are actually bound entangled. |
| first_indexed | 2024-03-12T16:47:49Z |
| format | Article |
| id | doaj.art-a9f9f30ba906402f95cb3c94b54b044b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:47:49Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a9f9f30ba906402f95cb3c94b54b044b2023-08-08T11:29:51ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115808303610.1088/1367-2630/15/8/083036Complementarity reveals bound entanglement of two twisted photonsBeatrix C Hiesmayr0Wolfgang Löffler1Institute of Theoretical Physics and Astrophysics, Masaryk University , Kotlářaská 2, 61137 Brno, Czech Republic; University of Vienna , Faculty of Physics, Boltzmanngasse 5, A-1090 Vienna, AustriaLeiden University , Quantum Optics and Quantum Information, PO Box 9500, 2300-RA Leiden, NetherlandsWe demonstrate the detection of bipartite bound entanglement as predicted by the Horodecki's in 1998. Bound entangled states, being heavily mixed entangled quantum states, can be produced by incoherent addition of pure entangled states. Until 1998 it was thought that such mixing could always be reversed by entanglement distillation; however, this turned out to be impossible for bound entangled states. The purest form of bound entanglement is that of only two particles, which requires higher-dimensional ( d > 2) quantum systems. We realize this using photon qutrit ( d = 3) pairs produced by spontaneous parametric downconversion, that are entangled in the orbital angular momentum degrees of freedom, which is scalable to high dimensions. Entanglement of the photons is confirmed via a ‘maximum complementarity protocol’. This conceptually simple protocol requires only maximized complementary of measurement bases; we show that it can also detect bound entanglement. We explore the bipartite qutrit space and find that, also experimentally, a significant portion of the entangled states are actually bound entangled.https://doi.org/10.1088/1367-2630/15/8/083036 |
| spellingShingle | Beatrix C Hiesmayr Wolfgang Löffler Complementarity reveals bound entanglement of two twisted photons New Journal of Physics |
| title | Complementarity reveals bound entanglement of two twisted photons |
| title_full | Complementarity reveals bound entanglement of two twisted photons |
| title_fullStr | Complementarity reveals bound entanglement of two twisted photons |
| title_full_unstemmed | Complementarity reveals bound entanglement of two twisted photons |
| title_short | Complementarity reveals bound entanglement of two twisted photons |
| title_sort | complementarity reveals bound entanglement of two twisted photons |
| url | https://doi.org/10.1088/1367-2630/15/8/083036 |
| work_keys_str_mv | AT beatrixchiesmayr complementarityrevealsboundentanglementoftwotwistedphotons AT wolfgangloffler complementarityrevealsboundentanglementoftwotwistedphotons |