Satisfying the Einstein-Podolsky-Rosen criterion with massive particles
arXiv:1511.08704 · doi:10.1038/ncomms9984
Abstract
In 1935, Einstein, Podolsky and Rosen (EPR) questioned the completeness of quantum mechanics by devising a quantum state of two massive particles with maximally correlated space and momentum coordinates. The EPR criterion qualifies such continuous-variable entangled states, where a measurement of one subsystem seemingly allows for a prediction of the second subsystem beyond the Heisenberg uncertainty relation. Up to now, continuous-variable EPR correlations have only been created with photons, while the demonstration of such strongly correlated states with massive particles is still outstanding. Here, we report on the creation of an EPR-correlated two-mode squeezed state in an ultracold atomic ensemble. The state shows an EPR entanglement parameter of 0.18(3), which is 2.4 standard deviations below the threshold 1/4 of the EPR criterion. We also present a full tomographic reconstruction of the underlying many-particle quantum state. The state presents a resource for tests of quantum nonlocality and a wide variety of applications in the field of continuous-variable quantum information and metrology.
8 pages, 7 figures
References in corpus (11)
- Entanglement detection
- Steering, Entanglement, Nonlocality, and the EPR Paradox
- Experimental Quantum State Tomography of Optical Fields and Ultrafast Statistical Sampling
- Squeezing and entanglement in a Bose-Einstein condensate
- Fisher Information and entanglement of non-Gaussian spin states
- Detecting multiparticle entanglement of Dicke states
- Full characterization of Gaussian bipartite entangled states by a single homodyne detector
- Einstein-Podolsky-Rosen paradox in twin images
- Phase sensitivity bounds for two-mode interferometers
- Detection of continuous variable entanglement without coherent local oscillators
- Interaction-free measurements by quantum Zeno stabilisation of ultracold atoms
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