Abstract
Entanglement is an essential property of quantum many-body systems. However, its local detection is challenging and was so far limited to spin degrees of freedom in ion chains. Here we measure entanglement between the spins of atoms located on two lattice sites in a one-dimensional Bose-Hubbard chain which features both local spin- and particle-number fluctuations. Starting with an initially localized spin impurity, we observe an outwards propagating entanglement wave and show quantitatively how entanglement in the spin sector rapidly decreases with increasing particle-number fluctuations in the chain.
- Received 10 April 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.035302
© 2015 American Physical Society
Viewpoint
Zooming in on Entanglement
Published 13 July 2015
A quantum microscope images a propagating wave of entanglement between atoms trapped in an optical lattice.
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