Phys. Rev. Lett. 95, 060503 (2005) - Superbroadcasting of Mixed States

Superbroadcasting of Mixed States

Giacomo Mauro D’Ariano, Chiara Macchiavello, and Paolo Perinotti

Phys. Rev. Lett. 95, 060503 – Published 5 August 2005

Abstract

We derive the optimal universal broadcasting for mixed states of qubits. We show that the no-broadcasting theorem cannot be generalized to more than a single input copy. Moreover, for four or more input copies it is even possible to purify the input states while broadcasting. We name such purifying broadcasting superbroadcasting.

Received 28 February 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.060503

©2005 American Physical Society

Authors & Affiliations

Giacomo Mauro D’Ariano^*, Chiara Macchiavello^†, and Paolo Perinotti^‡

INFM, unità di Pavia and Dipartimento di Fisica “A. Volta,” QUIT Group§, via Bassi 6, I-27100 Pavia, Italy

^*Electronic address: dariano@unipv.it
^†Electronic address: chiara@unipv.it
^‡Electronic address: perinotti@fisicavolta.unipv.it
^§URL: http://www.qubit.it

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 95, Iss. 6 — 5 August 2005

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Sign up to receive regular email alerts from Physical Review Letters