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Spatially Resolved Detection of a Spin-Entanglement Wave in a Bose-Hubbard Chain

Takeshi Fukuhara, Sebastian Hild, Johannes Zeiher, Peter Schauß, Immanuel Bloch, Manuel Endres, and Christian Gross
Phys. Rev. Lett. 115, 035302 – Published 13 July 2015
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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.

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  • Received 10 April 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.035302

© 2015 American Physical Society

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Published 13 July 2015

A quantum microscope images a propagating wave of entanglement between atoms trapped in an optical lattice.

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Authors & Affiliations

Takeshi Fukuhara1,2,*, Sebastian Hild1, Johannes Zeiher1, Peter Schauß1, Immanuel Bloch1,3, Manuel Endres4, and Christian Gross1

  • 1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
  • 2RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
  • 3Ludwig-Maximilians-Universität, Fakultät für Physik, 80799 München, Germany
  • 4Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

  • *Corresponding author. takeshi.fukuhara@riken.jp

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Issue

Vol. 115, Iss. 3 — 17 July 2015

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