On the negativity of the Wigner function as a measure of entanglement under quantum polarization converter devices

Abstract

We study the behaviour of the Negativity of Wigner Function (NWF) as a measure of entanglement in non-Gaussian states under quantum polarisation converter devices. We analyze comparatively this quantity with other measures of entanglement in a system prepared in a superposition of two-mode coherent states. We show that the (WF) can be identified as a quantifier of non-Gaussian entanglement.

References in corpus (10)

• Universal state inversion and concurrence in arbitrary dimensions
• Negativity of the Wigner function as an indicator of nonclassicality
• Non-gaussian statistics from individual pulses of squeezed light
• Direct measurement of the Wigner function by photon counting
• A measure of the non-Gaussian character of a quantum state
• Generation of atom-photon entangled states in atomic Bose-Einstein condensate via electromagnetically induced transparency
• Quantum Key Distribution with Blind Polarization Bases
• Fresnel Representation of the Wigner Function: An Operational Approach
• Decoy State Quantum Key Distribution With Modified Coherent State
• Fast and secure key distribution using mesoscopic coherent states of light