Many-particle entanglement in two-component Bose-Einstein condensates

By A. Micheli, Dieter Jaksch, J. I. Cirac, P. Z. I. F. T. Physik, U. Innsbruck, M Austria, M. Quantenoptik, Garching, Heidelberg · Germany. 2002

185 citations recorded by the source corpus.

We investigate schemes to dynamically create many-particle entangled states of a two-component Bose-Einstein condensate in a very short time proportional to $1/N,$ where N is the number of condensate particles. For small N we compare exact numerical calculations with analytical semiclassical estimates and find very good agreement for $Ng~50.$ We also estimate the effect of decoherence on our scheme, study possible scenarios for measuring the entangled states, and investigate experimental imperfections.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/8b54227bbd56806bd1a1168a191ebe00a613fca6

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Citations in the corpus

Physics with coherent matter waves (2004, background): “There are several proposals to prepare squeezed and/or entangled matter wave states which show the according interference [205, 312, 313, 314, 315, 316, 204, 317, 318, 319].”
Quantum spin squeezing (2010, background): “The particle collisions induced decoherence in the generation of spin squeezing was studied in [151], and spin-squeezed states generated in BEC are robust to dissipation [152], and particle losses [126, 153, 154].”
Quantum-enhanced measurements without entanglement (2017, unknown): “…et al., 2002; Ghirardi et al., 2002; Grabowski et al., 2011; Hines et al., 2003; Kraus et al., 2009; Lewenstein et al., 2007; Li et al., 2001; Micheli et al., 2003; Modi et al., 2012; Paskauskas and You, 2001; Schliemann et al., 2001; Schuch et al., 2004; Song et al., 2012; Tichy et al.,…”
Quantum metrology with nonclassical states of atomic ensembles (2016, background): “For Λ = 2 the semiclassical separatrix reaches the poles of the Bloch sphere: the dynamics creates NOON-like states on a time scale χt ≈ ln(8N)/N (Micheli et al., 2003).”
Spin squeezing, entanglement and quantum metrology with Bose–Einstein condensates (2012, background): “For initial states with relative phase φ = π, the evolution leads first to coherent spin squeezing and for longer times to Schrödinger cat-like states [110, 111].”