Multiparty multilevel energy-time entanglement

Abstract

Franson-like setups are inadequate for multiparty Bell experiments with energy-time entanglement because postselected events can depend on the local settings, and local models can exploit this feature to reproduce the quantum predictions, even in the case of ideal devices. We extend a previously introduced interferometric scheme [A. Cabello, et al., Phys. Rev. Lett. 102, 040401 (2009)] to solve this problem in the n-qubit and n-qunit cases. In addition, the proposed setups allow us to prepare and test n-qubit Greenberger-Horne-Zeilinger and $({\sum }_{i=1}^n|i...i>)/\sqrt{n}$ energy-time entangled states.

7 pages, 7 figures

References in corpus (5)

• Proposed Bell experiment with genuine energy-time entanglement
• Experimental Bell inequality violation without the postselection loophole
• Nonclassical Nature of Dispersion Cancellation and Nonlocal Interferometry
• Bell test for the free motion of material particles
• Electronic entanglement via quantum Hall interferometry in analogy to an optical method

Cited by in corpus (5)

• Observation of genuine three-photon interference
• Experimental Bell inequality violation without the postselection loophole
• Testing Hardy nonlocality proof with genuine energy-time entanglement
• Verifying Genuine High-Order Entanglement
• Direct observation of temporal coherence by weak projective measurements of photon arrival time