Are all noisy quantum states obtained from pure ones?

L Henderson, N Linden, S Popescu

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We ask what type of mixed quantum states can arise when a number of separated parties start by sharing a pure quantum state and then this pure state becomes contaminated by noise. We show that not all mixed states arise in this way. This is even the case if the separated parties actively try to degrade their initial pure state by arbitrary local actions and classical communication.

Translated title of the contributionAre all noisy quantum states obtained from pure ones?
Original languageEnglish
Article number237901
Pages (from-to)-
Number of pages3
JournalPhysical Review Letters
Volume87 (23)
DOIs
Publication statusPublished - 3 Dec 2001

Bibliographical note

Publisher: American Physical Soc
Other identifier: IDS number 498ZZ

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