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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Continuous variable quantum discord in a correlated emission laser
TL;DR: In this paper, a detailed analysis of the nonclassical features of the cavity radiation of a non-degenerate correlated emission laser is presented, and a closed mathematical relation that describes the quantum discord in terms of the involved auto-and cross-correlations is provided.
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Nonclassicality and decoherence of the coherent superposition operation of photon subtraction and addition on the squeezed state
TL;DR: In this article, the statistical properties of m-coherent superposition operation (μa + va†)m on the singlemode squeezed vacuum state (M-SSVS) and its decoherence in a thermal environment are studied.
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Role of phase fluctuation and dephasing in the enhancing continuous variable entanglement of a two-photon coherent beat laser
TL;DR: In this article, a steady state analysis of the nonclassical features and statistical properties of the cavity radiation of a two-photon coherent beat laser is presented, and it is shown that the degree of two-mode squeezing, detectable entanglement and intensity can increase with the deviation of the phase fluctuations of the laser employed in preparing the atoms, but decrease with the increasing rate at which the induced coherence superposition decays.
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Nonclassicality of photon-subtracted squeezing-enhanced coherent state
TL;DR: In this paper, the authors investigated nonclassical properties of the quantum state generated by subtracting any number of photons from the squeezing-enhanced coherent state and found that the normalization factor of this new state is related univariate Hermite polynomials.
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Harmonic entanglement in a degenerate parametric down-conversion
TL;DR: In this paper, a detailed study of the harmonic entanglement and two-mode squeezing of radiation generated in a degenerate parametric down-conversion process when the cavity is coupled to a twomode vacuum reservoir is presented.
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.
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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.
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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.
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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.