Quantum theory at the macroscopic scale

Autor(en)

Miguel Gallego, Borivoje Dakić

Abstrakt

The quantum description of the microscopic world is incompatible with the classical description of the macroscopic world, both mathematically and conceptually. Nevertheless, it is generally accepted that classical mechanics emerges from quantum mechanics in the macroscopic limit. In this paper, we challenge this perspective and demonstrate that the behaviour of a macroscopic system can retain all aspects of the quantum formalism, in a way that is robust against decoherence, particle losses and coarse-grained (imprecise) measurements. This departure from the expected classical description of macroscopic systems is not merely mathematical but also conceptual, as we show by the explicit violation of a Bell inequality and a Leggett–Garg inequality.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences

Band

481

Anzahl der Seiten

12

ISSN

1364-5021

DOI

https://doi.org/10.48550/arXiv.2409.03001

Publikationsdatum

08-2025

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/37f57a5d-477f-4981-a964-86fabe3d2653