Photon subtracted states and enhancement of nonlocality in the presence of noise

Abstract

We address nonlocality of continuous variable systems in the presence of dissipation and noise. Three nonlocality tests have been considered, based on the measurement of displaced-parity, field-quadrature and pseudospin-operator, respectively. Nonlocality of twin beam has been investigated, as well as that of its non-Gaussian counterparts obtained by inconclusive subtraction of photons. Our results indicate that: i) nonlocality of twin beam is degraded but not destroyed by noise; ii) photon subtraction enhances nonlocality in the presence of noise, especially in the low-energy regime.

arXiv comment12 pages, 7 figures

References in corpus (18)

• Non-gaussian statistics from individual pulses of squeezed light
• Continuous-variable teleportation improvement by photon subtraction via conditional measurement
• Nonlocality of Einstein-Podolsky-Rosen State in Wigner Representation
• Teleportation improvement by inconclusive photon subtraction
• Proposed Test of Quantum Nonlocality for Continuous Variables
• Maximal Violation of Bell's Inequalities for Continuous Variable Systems
• Quantum nonlocality test for continuous-variable states with dichotomic observables
• Entanglement and purity of two-mode Gaussian states in noisy channels
• Contradiction of Quantum Mechanics with Local Hidden Variables for Continuous Variable Quadrature Phase Amplitude Measurements
• Dynamics of Nonlocality for A Two-Mode Squeezed State in Thermal Environment
• Optimal States for Bell inequality Violations using Quadrature Phase Homodyne Measurements
• Bell's Inequality Violation (BIQV) with Non-Negative Wigner Function
• Loophole-free test of quantum non-locality using high-efficiency homodyne detectors
• Degaussification of twin-beam and nonlocality in the phase space
• Nonlocality of two- and three-mode continuous variable systems
• Optimization of Bell's Inequality Violation For Continuous Variable Systems
• Binary optical communication in single-mode and entangled quantum noisy channels
• On the conversion efficiency of ultracold fermionic atoms to bosonic molecules via Feshbach resonances

Cited by in corpus (23)

• Quantifying the non-Gaussian character of a quantum state by quantum relative entropy
• Quantifying non-Gaussianity for quantum information
• A measure of the non-Gaussian character of a quantum state
• Photon-subtracted squeezed thermal state: nonclassicality and decoherence
• Optimal estimation of entanglement
• Effect of noise and enhancement of nonlocality in on/off photodetection
• Photon--added squeezed thermal states: statistical properties and its decoherence in a photon-loss channel
• Conditional measurements on multimode pairwise entangled states from spontaneous parametric downconversion
• Quantum phase communication channels assisted by non-deterministic noiseless amplifiers
• Testing Bell inequalities with photon-subtracted Gaussian states
• Non-Gaussian states produced by close-to-threshold optical parametric oscillators: role of classical and quantum fluctuations
• Low-noise macroscopic twin beams
• Noisy propagation of Gaussian states in optical media with finite bandwidth
• Multiphoton communication in lossy channels with photon-number entangled states
• Two proposals for testing quantum contextuality of continuous-variable states
• De-Gaussification by inconclusive photon subtraction
• Violation of Bell's inequalities with pre-amplified homodyne detection
• Non-Gaussian states by conditional measurements
• On the experimental feasibility of continuous-variable optical entanglement distillation
• Response in violation of Bell inequality to imperfect photon addition and subtraction in noisy squeezed states of light
• Bell's inequality violation by dynamical Casimir photons in a superconducting microwave circuit
• Cost-effective temperature estimation strategies for thermal states with probabilistic quantum metrology
• Introduction to generation, manipulation and characterization of optical quantum states