A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

Retrievability of information in quantum and realistic hidden-variable theories




TekijätUola, Roope; Haapasalo, Erkka; Pellonpää, Juha-Pekka; Kuusela, Tom

KustantajaAmerican Physical Society

Julkaisuvuosi2024

JournalPhysical Review A

Tietokannassa oleva lehden nimi\pra

Artikkelin numero062202

Vuosikerta109

Numero6

ISSN2469-9926

eISSN2469-9934

DOIhttps://doi.org/10.1103/PhysRevA.109.062202

Verkko-osoitehttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.062202

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/457153771

Preprintin osoitehttps://arxiv.org/abs/2212.02815


Tiivistelmä

We propose a generalization of the Leggett-Garg conditions for macrorealistic behavior. Our proposal relies on relaxing the postulate of noninvasive measurability with that of retrievability of information. This leads to a strictly broader class of hidden-variable theories than those having a macrorealistic description. Crucially, whereas quantum mechanical tests of macrorealism require one to optimize over all possible state updates, for retrievability of information it suffices to use the basic Lüders state update, which is present in every quantum measurement. We show that in qubit systems the optimal retrieving protocols further relate to the fundamental precision limit of quantum theory given by Busch-Lahti-Werner error-disturbance uncertainty relations. We implement an optimal protocol using a photonic setting and report an experimental violation of the proposed generalization of macrorealism.


Ladattava julkaisu

This is an electronic reprint of the original article.
This reprint may differ from the original in pagination and typographic detail. Please cite the original version.




Julkaisussa olevat rahoitustiedot
Research funded by National Science Foundation (PZ00P2-202179). E.H. is funded by the National Research Foundation, Prime Minister’s Office, Singapore and the Ministry of Education, Singapore under the Research Centres of Excellence programme.


Last updated on 2025-05-06 at 08:48