Full characterization of Gaussian bipartite entangled states by a single homodyne detector
arXiv:0805.1993 · doi:10.1103/PhysRevLett.102.020502
Abstract
We present the full experimental reconstruction of Gaussian entangled states generated by a type--II optical parametric oscillator (OPO) below threshold. Our scheme provides the entire covariance matrix using a single homodyne detector and allows for the complete characterization of bipartite Gaussian states, including the evaluation of purity, entanglement and nonclassical photon correlations, without a priori assumptions on the state under investigation. Our results show that single homodyne schemes are convenient and robust setups for the full characterization of OPO signals and represent a tool for quantum technology based on continuous variable entanglement.
4 pages, 3 figures, slightly longer version of published PRL
References in corpus (8)
- Entanglement in continuous variable systems: Recent advances and current perspectives
- Experimental continuous-variable entanglement from a phase-difference-locked optical parametric oscillator
- Entanglement of formation for an arbitrary two-mode Gaussian state
- Experimental characterization of Gaussian quantum communication channels
- Experimental demonstration of frequency-degenerate bright EPR beams with a self-phase-locked optical parametric oscillator
- Intensity correlations, entanglement properties and ghost imaging in multimode thermal-seeded parametric downconversion: Theory
- Transmittivity measurements by means of squeezed vacuum light
- Criteria of quantum correlation in the measurement of continuous variables in optics
Cited by in corpus (38)
- Resources of nonlinear cavity magnonics for quantum information
- Homodyne estimation of Gaussian quantum discord
- Strong laser physics, non-classical light states and quantum information science
- Experimental demonstration of remotely creating Wigner negativity via quantum steering
- Towards higher precision and operational use of optical homodyne tomograms
- Temporal Quantum-State Tomography of Narrowband Biphotons
- Experimental analysis of decoherence of quantumness in a continuous variables bi-partite entangled system
- An effective method to estimate multidimensional Gaussian states
- Continuous variable entanglement enhancement and manipulation by a sub-threshold type-II optical parametric amplifier
- Continuous-variable entanglement of two bright coherent states that never interacted
- Experimentally friendly bounds on non-Gaussian entanglement from second moments
- Robustness of raw quantum tomography
- Spin tomography and star-product kernel for qubits and qutrits
- Quantum state engineering of light with continuous-wave optical parametric oscillators
- Chebyshev polynomials and Fourier transform of SU(2) irreducible representation character as spin-tomographic star-product kernel
- Different operational meanings of continuous variable Gaussian entanglement criteria and Bell inequalities
- Mesoscopic and macroscopic quantum correlations in photonic, atomic and optomechanical systems
- Multi-mode Gaussian State Analysis with Total Photon Counting
- Experimental characterization of the Gaussian state of squeezed light obtained via single-passage through an atomic vapor
- Generalized tomographic maps and star-product formalism
- Spectral and statistical properties of high-gain parametric down-conversion
- A possible experimental check of the uncertainty relations by means of homodyne measuring photon quadrature
- Distributing long-distance trust in optomechanics
- Novel technique for the active stabilization of the relative phase between seed and pump in an optical parametric oscillator
- Complete State Reconstruction of a Two-Mode Gaussian State via Local Operations and Classical Communication
- Noisy effects in interferometric quantum gravity tests
- Universal quantum frequency comb measurements by spectral mode-matching
- Hidden quantum correlations in cavity-based quantum optics
- Entanglement recovery in noisy binary quantum information protocols via three-qubit quantum error correction codes
- Quantum entanglement and Einstein-Podolsky-Rosen steering in ultrastrongly light-matter coupled system
- Manipulating the direction of one-way steering in an optomechanical ring cavity
- Configurable photonic simulator for quantum field dynamics
- An investigation of nonclassical properties of light using an optical tomogram
- Tomography in Loop Quantum Cosmology
- Introduction to generation, manipulation and characterization of optical quantum states
- Multi-mode Gaussian State Analysis with one Bounded Photon Counter
- Asymmetry effects in homodyne and heterodyne measurements: Positive operator-valued measures and asymptotic security of Gaussian-continuous-variable quantum key distribution
- Generating Asymmetric Einstein-Podolsky-Rosen Steering between Two movable Mirrors Exploiting Correlated-Emission Laser