Macroscopic State Interferometry Over Large Distances Using State Discrimination

Abstract

The propagation of macroscopic entangled states over large distances in the presence of loss is of fundamental interest and may have practical applications as well. Here we describe two different techniques in which state discrimination can be used to violate Bell's inequality with macroscopic phase-entangled coherent states. We find that Bell's inequality can be violated by these macroscopic states over a distance of approximately 400 km in commercially-available optical fibers.

8 pages, 5 figures

References in corpus (5)

• Demonstration of near-Optimal Discrimination of Optical Coherent States
• Displacement receiver for phase-shift-keyed coherent states
• QPSK coherent state discrimination via a hybrid receiver
• Nonlocal Interferometry Using Macroscopic Coherent States and Weak Nonlinearities
• Coherent State Quantum Key Distribution with Entanglement Witnessing

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• Generating entangled Schrodinger cat states using a number state and a beam splitter
• Feasibility of single-photon cross-phase modulation using metastable xenon in a high finesse cavity
• Overcoming experimental limitations in a non-linear two-qubit gate through postselection
• Origin of Quantum Noise and Decoherence in Distributed Amplifiers
• The Lindley paradox in optical interferometry
• Cross-Phase Modulation Enhancement Via a Resonating Cavity: Semiclassical Description