Quantum correlations in separable multi-mode states and in classically entangled light

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Details zur Publikation

Autorinnen und Autoren: Korolkova N, Leuchs G
Zeitschrift: Reports on Progress in Physics
Jahr der Veröffentlichung: 2019
Band: 82
Heftnummer: 5
ISSN: 0034-4885


In this review we discuss intriguing properties of apparently classical optical fields, that go beyond purely classical context and allow us to speak about quantum characteristics of such fields and about their applications in quantum technologies. We briefly define the genuinely quantum concepts of entanglement and steering. We then move to the boarder line between classical and quantum world introducing quantum discord, a more general concept of quantum coherence, and finally a controversial notion of classical entanglement. To unveil the quantum aspects of often classically perceived systems, we focus more in detail on quantum discordant correlations between the light modes and on nonseparability properties of optical vector fields leading to entanglement between different degrees of freedom of a single beam. To illustrate the aptitude of different types of correlated systems to act as quantum or quantum-like resource, entanglement activation from discord, high-precision measurements with classical entanglement and quantum information tasks using intra-system correlations are discussed. The common themes behind the versatile quantum properties of seemingly classical light are coherence, polarization and inter and intra-mode quantum correlations.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Leuchs, Gerd Prof. Dr.
Lehrstuhl für Experimentalphysik (Optik)

Einrichtungen weiterer Autorinnen und Autoren

University of St Andrews


Korolkova, N., & Leuchs, G. (2019). Quantum correlations in separable multi-mode states and in classically entangled light. Reports on Progress in Physics, 82(5). https://dx.doi.org/10.1088/1361-6633/ab0c6b

Korolkova, N., and Gerd Leuchs. "Quantum correlations in separable multi-mode states and in classically entangled light." Reports on Progress in Physics 82.5 (2019).


Zuletzt aktualisiert 2019-23-04 um 13:38