Entangled states and the gravitational quantum well

Rui Alves, Orfeu Bertolami, Catarina Bastos
2018 Europhysics letters  
We study the continuous variable entanglement of a system of two particles under the influence of Earth's gravitational field. We determine a phase-space description of this bipartite system by calculating its Wigner function and verify its entanglement by applying a generalization of the PPT criterion for non-Gaussian states. We also examine the influence of gravity on an idealized entanglement protocol to be shared between stations at different potentials based on the correlation of states of
more » ... lation of states of the gravitational quantum well.
doi:10.1209/0295-5075/124/10001 fatcat:fc44dvhgcnegdb2aah3tp525cu