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
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Journal ArticleDOI
The Quantum Analysis of Nonlinear Optical Parametric Processes with Thermal Reservoirs
Tamirat Abebe,Nebiyu Gemechu,Chimdessa Gashu,Kebede Shogile,Solomon Hailemariam,Shimelis Adisu +5 more
TL;DR: In this paper, the quantum properties of a non-degenerate three-level cascade laser with a parametric amplifier and coupled to a two-mode thermal reservoir are thoroughly analyzed, particularly, the enhancement of squeezing and the amplification of photon entanglement of the twomode cavity light are investigated.
Dissertation
Dispositifs impulsionnels pour la communication quantique à variables continues
TL;DR: In this article, a source impulsionnelle d'etats comprimes and intriques is presented for cryptographie quantique avec des etats coherents.
Journal ArticleDOI
Assisted concentration of Gaussian resources
TL;DR: This work provides a concise general expression for the Gaussian resource of assistance, i.e., the distillable resource when the aiding party holds a purification of the aided party's state, and develops some variational expressions to handle functions of symplectic eigenvalues that may be of independent interest.
Journal ArticleDOI
A comparative study of entanglement amplification in a nondegenerate three-level cascade laser employing various inseparability criteria
TL;DR: In this article, a detailed comparison among the exhibited nature of entanglement of the cavity radiation of the nondegenerate three-level cascade laser when different inseparability criteria are employed is presented.
Journal ArticleDOI
Minimal set of local measurements and classical communication for two-mode Gaussian state entanglement quantification.
TL;DR: The minimal requirements for the complete entanglement quantification of an arbitrary two-mode bipartite Gaussian state are developed via local measurements and a classical communication channel and no previous knowledge of the state is required but its Gaussian character.
References
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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.