Quantumness beyond entanglement: The case of symmetric states

Goldberg AZ, Grassl M, Leuchs G, Sánchez-Soto LL (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review A American Physical Society

Book Volume: 105

Article Number: 022433

Journal Issue: 2

DOI: 10.1103/PhysRevA.105.022433

Abstract

Nowadays, it is accepted that truly quantum correlations can exist even in the absence of entanglement. For the case of symmetric states, a physically trivial unitary transformation can alter a state from entangled to separable, and vice versa. We propose to certify the presence of quantumness via an average of a state's bipartite entanglement properties over all physically relevant modal decompositions. We investigate extremal states for such a measure: SU(2)-coherent states possess the least quantumness, whereas the opposite extreme is inhabited by states with maximally spread Majorana constellations.

Authors with CRIS profile

Gerhard Leuchs Lehrstuhl für Experimentalphysik (Optik)

Involved external institutions

National Research Council / Conseil national de recherches Canada CA Canada (CA) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) University of Gdańsk / Uniwersytet Gdański PL Poland (PL)

How to cite

APA:

Goldberg, A.Z., Grassl, M., Leuchs, G., & Sánchez-Soto, L.L. (2022). Quantumness beyond entanglement: The case of symmetric states. Physical Review A, 105(2). https://dx.doi.org/10.1103/PhysRevA.105.022433

MLA:

Goldberg, Aaron Z., et al. "Quantumness beyond entanglement: The case of symmetric states." Physical Review A 105.2 (2022).

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