macroscopicity

Definitions

1. The quality or state of being macroscopic.
   uncountable
2. A formal measure of the size of a quantum mechanical system or experiment which, while typically larger than the atomic scale, has not undergone decoherence.
   countable

Examples

“...it appears to be a small step from (1) and (2) to the identification of a sufficiently large mass with a macroscopic mass and, by analogy, to the consideration as macroscopic any system having sufficiently large quantum numbers associated with it, as well as to accept⟳ such macroscopicity as sufficient for classicality.”

“In contrast, permutation-symmetric pure states feature rather low geometric entanglement and strong and robust macroscopicity”

“Macroscopicities of a representative selection of quantum superposition experiments with mechanical systems plotted against their publication date⟳ (adapted from [17] with additional data).”

“2014, M. Arndt, et al., Matter⟳ wave⟳ interferometry with composite quantum objects, G. M. Tino, M. A. Kasevich (editors), Interferometria atomica, Società Italiana di Fisica, [jointly published as Atom Interferometry, IOS Press⟳], page 136, Macroscopicities for a selection of neutron, atom, molecule and SQUID superposition experiments ordered according to their publication date⟳.”

CEFR level