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Quantum speedup in the identification of cause-effect relations.

Abstract：

:The ability to identify cause-effect relations is an essential component of the scientific method. The identification of causal relations is generally accomplished through statistical trials where alternative hypotheses are tested against each other. Traditionally, such trials have been based on classical statistics. However, classical statistics becomes inadequate at the quantum scale, where a richer spectrum of causal relations is accessible. Here we show that quantum strategies can greatly speed up the identification of causal relations. We analyse the task of identifying the effect of a given variable, and we show that the optimal quantum strategy beats all classical strategies by running multiple equivalent tests in a quantum superposition. The same working principle leads to advantages in the detection of a causal link between two variables, and in the identification of the cause of a given variable.

journal_name

Nat Commun

journal_title

Nature communications

authors

Chiribella G,Ebler D

doi

10.1038/s41467-019-09383-8

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

1472

issue

1

issn

2041-1723

pii

10.1038/s41467-019-09383-8

journal_volume

10

pub_type

杂志文章

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