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Direct Measurement of a Nonlocal Entangled Quantum State
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 112019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 123, no 15, article id 150402Article in journal (Refereed) Published
Abstract [en]

Entanglement and the wave function description are two of the core concepts that make quantum mechanics such a unique theory. A method to directly measure the wave function, using weak values, was demonstrated by Lundeen et al. [Nature 474, 188 (2011)]. However, it is not applicable to a scenario of two disjoint systems, where nonlocal entanglement can be a crucial element, since that requires obtaining weak values of nonlocal observables. Here, for the first time, we propose a method to directly measure a nonlocal wave function of a bipartite system, using modular values. The method is experimentally implemented for a photon pair in a hyperentangled state, i.e., entangled both in polarization and momentum degrees of freedom.

Place, publisher, year, edition, pages
2019. Vol. 123, no 15, article id 150402
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-175810DOI: 10.1103/PhysRevLett.123.150402ISI: 000489255900001OAI: oai:DiVA.org:su-175810DiVA, id: diva2:1371810
Available from: 2019-11-21 Created: 2019-11-21 Last updated: 2019-11-21Bibliographically approved

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