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Abstract
We pose the fundamental question of communication properties of primitives irrespectively of their implementation. To illustrate the idea we introduce the concept of entanglement-swapping boxes, i.e., we consider any quantum operations which perform entanglement swapping, not necessarily via simple quantum teleportation. We ask a question about the properties of such boxes, i.e., what local operations and how much classical communication are needed to perform them. We also ask if any box which performs entanglement swapping can be used to establish classical communication. We show that each box needs at least two bits of classical communication to perform it. It is also shown that each box can be used for classical communication and, most importantly, that there exist boxes which allow one to communicate at most one bit. Surprisingly we find basic irreversibility in the process of entanglement swapping with respect to its classical communication properties.
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- Accepted or Published Version
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- Copyright (2008 American Physical Society)
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie z listy filadelfijskiej
- Published in:
-
PHYSICAL REVIEW A
no. 77,
pages 0 - 4,
ISSN: 2469-9926 - Publication year:
- 2008
- Bibliographic description:
- Grudka A., Horodecki M., Horodecki P., Horodecki R., Piani M.: Entanglement-swapping boxes and their communication properties// PHYSICAL REVIEW A. -Vol. 77., nr. iss. 6 (2008), s.0-4
- Verified by:
- Gdańsk University of Technology
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