Journal
PHYSICAL REVIEW A
Volume 100, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.100.042117
Keywords
-
Categories
Funding
- Austrian Science Fund (FWF) [M 2107-N27, M 2462-N27]
- START project [Y879-N27]
- Finnish Cultural Foundation
- ERC [683107/TempoQ]
- Zukunftskolleg [ZK 3]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available