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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Effect of biased noise fluctuations on entanglement and statistical properties in a two-photon phase-sensitive laser
TL;DR: In this article, the effects of the biased noise fluctuations on the quantum features and statistical properties of the cavity radiation of the two-photon phase-sensitive laser were analyzed, and it was shown that the biased noises that enter the cavity via the vibrations of the wall enhance the atomic coherence responsible for the entanglement of cavity radiation due to the phase sensitivity of the involved cascade transitions.
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Three-mode entanglement via tunneling-induced interference in a coupled triple-semiconductor quantum-well structure
Xin-You Lü,Xin-You Lü,Jing Wu +2 more
TL;DR: In this article, a simple scheme was proposed to achieve three-mode continuous-variable entanglement in a coupled triple-semiconductor quantum-well (TSQW) structure via tunneling-induced interference.
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Continuous variable entanglement in a coherently pumped correlated emission laser
TL;DR: In this paper, the effects of external pumping on the quantum features of cavity radiation of the two-photon correlated emission laser are analyzed and it is shown that the pumping process induces the atomic coherence responsible for the entanglement of the cavity radiation as well as correlation between the photon numbers belonging to different modes, despite the arising vacuum fluctuations.
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Superposition and entanglement of mesoscopic squeezed vacuum states in cavity QED
TL;DR: In this article, the authors proposed a scheme to generate superposition and entanglement between mesoscopic squeezed vacuum states by considering the two-photon interaction of N two-level atoms in a cavity with high quality factor, assisted by a strong driving field.
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Externally induced continuous variable entanglement in a correlated emission laser
TL;DR: In this paper, an analysis of the externally induced quantum features of the cavity radiation of the two-photon correlated emission laser is presented, and it is shown that the pumping process induces atomic coherence responsible for observing entanglement in the cavity, as well as the nonclassical photon number correlation despite the arising vacuum fluctuations.
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.
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.