Nonclassicality Invariant of General Two-Mode Gaussian States
Abstract:
We introduce a new quantity for describing nonclassicality of an arbitrary optical two-mode Gaussian state which remains invariant under any global photon-number preserving unitary transformation of the covariance matrix of the state. The invariant naturally splits into an entanglement monotone and local-nonclassicality quantifiers applied to the reduced states. This shows how entanglement can be converted into local squeezing and vice versa. Twin beams and their transformations at a beam splitter are analyzed as an example providing squeezed light. An extension of this approach to pure three-mode Gaussian states is given.
Año de publicación:
2016
Keywords:
Fuente:


Tipo de documento:
Article
Estado:
Acceso abierto
Áreas de conocimiento:
- Mecánica cuántica
- Mecánica cuántica
Áreas temáticas:
- Física
- Química y ciencias afines
- Matemáticas