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Leggett-Garg macrorealism and the quantum nondisturbance conditions
- Autor(en)
- Roope Uola, Giuseppe Vitagliano, Costantino Budroni
- Abstrakt
We investigate the relation between a refined version of Leggett and Garg conditions for macrorealism, namely, the no-signaling-in-time (NSIT) conditions, and the quantum mechanical notion of nondisturbance between measurements. We show that all NSIT conditions are satisfied for any state preparation if and only if certain compatibility criteria on the state-update rules relative to the measurements, i.e., quantum instruments, are met. The systematic treatment of NSIT conditions supported by structural results on nondisturbance provides a unified framework for the discussion of the the clumsiness loophole. This extends previous approaches and allows for a tightening of the loophole via a hierarchy of tests able to disprove a larger class of macrorealist theories. Finally, we discuss perspectives for a resource theory of quantum mechanical disturbance related to violations of macrorealism.
- Organisation(en)
- Quantenoptik, Quantennanophysik und Quanteninformation
- Externe Organisation(en)
- Universität Siegen, Universität Genf, Österreichische Akademie der Wissenschaften (ÖAW)
- Journal
- Physical Review A
- Band
- 100
- Anzahl der Seiten
- 17
- ISSN
- 2469-9926
- DOI
- https://doi.org/10.1103/PhysRevA.100.042117
- Publikationsdatum
- 10-2019
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103025 Quantenmechanik
- ASJC Scopus Sachgebiete
- Atomic and Molecular Physics, and Optics
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/36fc337d-d8ed-4581-b1a0-5456ae4734c1