Journal
SCIENCE
Volume 360, Issue 6387, Pages 413-415Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao2254
Keywords
-
Categories
Funding
- Heidelberg Graduate School of Fundamental Physics
- Heidelberg Center for Quantum Dynamics
- European Commission, within the Horizon program, through the FET-Proactive grant AQuS [640800]
- European Research Commission Advanced Grant EntangleGen [694561]
- DFG (German Research Foundation) Collaborative Research Center [SFB1225]
- European Research Council (ERC) [694561] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available