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Spatially distributed multipartite entanglement enables EPR steering of atomic clouds.

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Title: Spatially distributed multipartite entanglement enables EPR steering of atomic clouds.
Authors: Kunkel, Philipp (AUTHOR), Prüfer, Maximilian (AUTHOR), Strobel, Helmut (AUTHOR), Linnemann, Daniel (AUTHOR), Frölian, Anika (AUTHOR), Gasenzer, Thomas (AUTHOR), Gärttner, Martin (AUTHOR), Oberthaler, Markus K. (AUTHOR)
Source: Science (pre-March 2025). 4/27/2018, Vol. 360 Issue 6387, p413-416. 4p. 4 Black and White Photographs, 1 Diagram, 3 Graphs.
Subjects: Quantum entanglement, Bose-Einstein condensation, Einstein-Podolsky-Rosen paradox, Computational steering (Computer science), Quantum theory
Abstract: A key resource for distributed quantum-enhanced protocols is entanglement between spatially separated modes. However, the robust generation and detection of entanglement between spatially separated regions of an ultracold atomic system remain a challenge. We used spin mixing in a tightly confined Bose-Einstein condensate to generate an entangled state of indistinguishable particles in a single spatial mode. We show experimentally that this entanglement can be spatially distributed by self-similar expansion of the atomic cloud. We used spatially resolved spin read-out to reveal a particularly strong form of quantum correlations known as Einstein-Podolsky-Rosen (EPR) steering between distinct parts of the expanded cloud. Based on the strength of EPR steering, we constructed a witness, which confirmed genuine 5-partite entanglement. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Spatially distributed multipartite entanglement enables EPR steering of atomic clouds.
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  Data: <searchLink fieldCode="AR" term="%22Kunkel%2C+Philipp%22">Kunkel, Philipp</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Prüfer%2C+Maximilian%22">Prüfer, Maximilian</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Strobel%2C+Helmut%22">Strobel, Helmut</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Linnemann%2C+Daniel%22">Linnemann, Daniel</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Frölian%2C+Anika%22">Frölian, Anika</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gasenzer%2C+Thomas%22">Gasenzer, Thomas</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gärttner%2C+Martin%22">Gärttner, Martin</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oberthaler%2C+Markus+K%2E%22">Oberthaler, Markus K.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/27/2018, Vol. 360 Issue 6387, p413-416. 4p. 4 Black and White Photographs, 1 Diagram, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Quantum+entanglement%22">Quantum entanglement</searchLink><br /><searchLink fieldCode="DE" term="%22Bose-Einstein+condensation%22">Bose-Einstein condensation</searchLink><br /><searchLink fieldCode="DE" term="%22Einstein-Podolsky-Rosen+paradox%22">Einstein-Podolsky-Rosen paradox</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+steering+%28Computer+science%29%22">Computational steering (Computer science)</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink>
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  Data: A key resource for distributed quantum-enhanced protocols is entanglement between spatially separated modes. However, the robust generation and detection of entanglement between spatially separated regions of an ultracold atomic system remain a challenge. We used spin mixing in a tightly confined Bose-Einstein condensate to generate an entangled state of indistinguishable particles in a single spatial mode. We show experimentally that this entanglement can be spatially distributed by self-similar expansion of the atomic cloud. We used spatially resolved spin read-out to reveal a particularly strong form of quantum correlations known as Einstein-Podolsky-Rosen (EPR) steering between distinct parts of the expanded cloud. Based on the strength of EPR steering, we constructed a witness, which confirmed genuine 5-partite entanglement. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=129326974
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              Text: 4/27/2018
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