How to Measure Squeezing and Entanglement of Gaussian States without Homodyning
Jaromír Fiurášek,Nicolas J. Cerf +1 more
TLDR
This work proposes a scheme for measuring the squeezing, purity, and entanglement of Gaussian states of light that does not require homodyne detection and needs only beam splitters and single-photon detectors.Abstract:
We propose a scheme for measuring the squeezing, purity, and entanglement of Gaussian states of light that does not require homodyne detection. The suggested setup needs only beam splitters and single-photon detectors. Two-mode entanglement can be detected from coincidences between photodetectors placed on the two beams.read more
Citations
More filters
Journal ArticleDOI
Atom–atom entanglement dynamics enhancement via classically driven atoms coupled to a non-resonance single mode cavity field filled with nonlinear Kerr media
TL;DR: In this paper, the entanglement dynamics of two identical non-interacting atoms (qubits) coupled individually with simultaneous classical and quantum fields are studied, where the cavity field is filled with a nonlinear Kerr medium and initially prepared in a coherent state.
Journal ArticleDOI
Maximally polarized states for quantum light fields
TL;DR: In this article, the degree of polarization of a quantum field can be defined as its distance to an appropriate set of states, and the states optimizing this distance are defined as the optimal ones.
Journal ArticleDOI
Generation of cluster-type entangled squeezed vacuum states
TL;DR: In this paper, a scheme to prepare cluster-type entangled squeezed vacuum states (CTESVS) by considering the two-photon interaction between a two-level atom and a high-quality cavity, driven by a strong classical field is presented.
Journal ArticleDOI
Entanglement of two-mode Gaussian states: characterization and experimental production and manipulation
Julien Laurat,Gaelle Keller,José Augusto Oliveira-Huguenin,Claude Fabre,Thomas Coudreau,Alessio Serafini,Alessio Serafini,Gerardo Adesso,Fabrizio Illuminati +8 more
TL;DR: In this article, a type-II OPO with adjustable mode coupling is proposed to characterize and quantify entanglement in continuous-variable systems, and experimental results allow a direct verification of many theoretical predictions and provide a sharp insight into the general properties of two-mode Gaussian states.
Journal ArticleDOI
Geometric characterization of separability and entanglement in pure Gaussian states by single-mode unitary operations
Gerardo Adesso,Gerardo Adesso,Salvatore Marco Giampaolo,Fabrizio Illuminati,Fabrizio Illuminati +4 more
TL;DR: In this article, Giampaolo et al. presented a geometric approach to the characterization of separability and entanglement in pure Gaussian states of an arbitrary number of modes.
References
More filters
Journal ArticleDOI
Computable measure of entanglement
Guifre Vidal,Reinhard F. Werner +1 more
TL;DR: A measure of entanglement that can be computed effectively for any mixed state of an arbitrary bipartite system is presented and it is shown that it does not increase under local manipulations of the system.
Journal ArticleDOI
Quantum Information with Continuous Variables
TL;DR: In this article, the authors present the Deutsch-Jozsa algorithm for continuous variables, and a deterministic version of it is used for quantum information processing with continuous variables.
Journal ArticleDOI
Peres-horodecki separability criterion for continuous variable systems
TL;DR: The Peres-Horodecki criterion of positivity under partial transpose is studied in the context of separability of bipartite continuous variable states and turns out to be a necessary and sufficient condition for separability.
Journal ArticleDOI
Inseparability Criterion for Continuous Variable Systems
TL;DR: An inseparability criterion based on the total variance of a pair of Einstein-Podolsky-Rosen type operators is proposed for continuous variable systems and turns out to be a necessary and sufficient condition for inseparability.
Book
A Guide to Experiments in Quantum Optics
Hans-A. Bachor,Timothy C. Ralph +1 more
TL;DR: In this paper, the authors present a survey of classical models of light experiments with Photons, as well as non-demolition experiments with light and non-quantum noise.