2017/08/08 by Karsten Lange, Jan Peise, Bernd Lücke +7 · 199 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Entanglement witness #Identical particles #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum discord #Quantum entanglement #Quantum metrology #Quantum sensor #Squashed entanglement #Ultracold atom #cond-mat.quant-gas #physics.atom-ph #quant-ph
paper · pdf · doi:10.1126/science.aao2035
published in Science 360(6387), 416-418 (American Association for the Advancement of Science)
arxiv created 2017/08/08 · openalex created_date 2017/08/17 · openalex publication_date 2018/04/26 · arxiv updated 2018/05/15 · openalex updated_date 2026/08/06
Modern quantum technologies in the fields of quantum computing, quantum simulation, and quantum metrology require the creation and control of large ensembles of entangled particles. In ultracold ensembles of neutral atoms, nonclassical states have been generated with mutual entanglement among thousands of particles. The entanglement generation relies on the fundamental particle-exchange symmetry in ensembles of identical particles, which lacks the standard notion of entanglement between clearly definable subsystems. Here, we present the generation of entanglement between two spatially separated clouds by splitting an ensemble of ultracold identical particles prepared in a twin Fock state. Because the clouds can be addressed individually, our experiments open a path to exploit the available entangled states of indistinguishable particles for quantum information applications.