Issue |
EPL
Volume 83, Number 3, August 2008
|
|
---|---|---|
Article Number | 30004 | |
Number of page(s) | 6 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/83/30004 | |
Published online | 11 July 2008 |
Transforming quantum operations: Quantum supermaps
QUIT Group, Dipartimento di Fisica ”A. Volta” and CNISM - via Bassi 6, 27100 Pavia, Italy, EU
Corresponding authors: chiribella@fisicavolta.unipv.it dariano@unipv.it perinotti@fisicavolta.unipv.it
Received:
1
April
2008
Accepted:
9
June
2008
We introduce the concept of quantum supermap, describing the most general transformation that maps an input quantum operation into an output quantum operation. Since quantum operations include as special cases quantum states, effects, and measurements, quantum supermaps describe all possible transformations between elementary quantum objects (quantum systems as well as quantum devices). After giving the axiomatic definition of supermap, we prove a realization theorem, which shows that any supermap can be physically implemented as a simple quantum circuit. Applications to quantum programming, cloning, discrimination, estimation, information-disturbance trade-off, and tomography of channels are outlined.
PACS: 03.67.-a – Quantum information / 03.65.-w – Quantum mechanics / 03.65.Ta – Foundations of quantum mechanics; measurement theory
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.