Work

Experimental demonstration of a fully inseparable quantum state with nonlocalizable entanglement

Year: 2017

Type: article

Abstract: Localizability of entanglement in fully inseparable states is a key ingredient of assisted quantum information protocols as well as measurement-based models of quantum computing. We investigate the existence of fully inseparable states with nonlocalizable entanglement, that is, with entanglement which cannot be localized between any pair of subsystems by any measurement on the remaining part of the system. It is shown, that the nonlocalizable entanglement occurs already in suitable mixtures of a three-qubit GHZ state and white noise. Further, we generalize this set of states to a two-parametric family of fully inseparable three-qubit states with nonlocalizable entanglement. Finally, we demonstrate experimentally the existence of nonlocalizable entanglement by preparing and characterizing one state from the family using correlated single photons and linear optical circuit.

Source: Scientific Reports

DOI: 10.1038/srep45045

Authors: M. Mičuda, D. Koutný, M. Miková, I. Straka, M. Ježek, L. Mišta

Institution: Palacký University Olomouc

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: Grantová Agentura České Republiky, Univerzita Palackého v Olomouci