Uncertainty relations for the realisation of macroscopic quantum superpositions and EPR paradoxes

Abstract

We present a unified approach, based on the use of quantum uncertainty relations, for arriving at criteria for the demonstration of the EPR paradox and macroscopic superpositions. We suggest to view each criterion as a means to demonstrate an EPR-type paradox, where there is an inconsistency between the assumptions of a form of realism, either macroscopic realism (MR) or local realism (LR), and the completeness of quantum mechanics.

9 pages, 2 figures, to appear Journ Mod Optics work presented at PQE 2007 conference

References in corpus (8)

• Experimental long-lived entanglement of two macroscopic objects
• Violation of local uncertainty relations as a signature of entanglement
• Experimental demonstration of continuous variable polarization entanglement
• Polarization Squeezing of Continuous Variable Stokes Parameters
• Polarization squeezing with cold atoms
• 7 dB quadrature squeezing at 860 nm with periodically-poled KTiOPO4
• Many-body quantum dynamics of polarisation squeezing in optical fibre
• Signatures for generalized macroscopic superpositions

Cited by in corpus (19)

• The Einstein-Podolsky-Rosen paradox: from concepts to applications
• Experimental criteria for steering and the Einstein-Podolsky-Rosen paradox
• Quantum steering: a review with focus on semidefinite programming
• Strong Einstein-Podolsky-Rosen steering with unconditional entangled states
• Planar quantum squeezing and atom interferometry
• Einstein-Podolsky-Rosen experiment with two Bose-Einstein condensates
• Experimental Observation of Quantum Correlations in Modular Variables
• Spin entanglement, decoherence and Bohm's EPR paradox
• Criteria for generalized macroscopic and mesoscopic quantum coherence
• Dynamical preparation of EPR entanglement in two-well Bose-Einstein condensates
• Entanglement and nonlocality in multi-particle systems
• Relating spin squeezing to multipartite entanglement criteria for particles and modes
• Towards an Einstein-Podolsky-Rosen paradox between two macroscopic atomic ensembles at room temperature
• Quantum uncertainty relation based on the mean deviation
• Number-phase uncertainty relations and bipartite entanglement detection in spin ensembles
• Direct Experimental Test of Forward and Reverse Uncertainty Relations
• Uncertainty relations from state polynomial optimization
• Mutual Uncertainty, Conditional Uncertainty and Strong Sub-Additivity
• EPR steering in symmetrical Gaussian states