title: Entropic entanglement criteria for continuous variables.
abstract: We derive several entanglement criteria for bipartite continuous variable quantum systems based on the Shannon entropy. These criteria are more sensitive than those involving only second-order moments, and are equivalent to well-known variance product tests in the case of Gaussian states. Furthermore, they involve only a pair of quadrature measurements, and will thus prove extremely useful in the experimental identification of entanglement.
authors.affiliation: Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil.
authors.forename: S P
authors.initials: SP
authors.lastname: Walborn
authors.forename: B G
authors.initials: BG
authors.lastname: Taketani
authors.forename: A
authors.initials: A
authors.lastname: Salles
authors.forename: F
authors.initials: F
authors.lastname: Toscano
authors.forename: R L
authors.initials: RL
authors.lastname: de Matos Filho