Asymmetric quantum telecloning of d-level systems and broadcasting of entanglement to different locations using the 'many-to-many' communication protocol

Journal Article · Wed Jan 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.012323· OSTI ID:20634101

Ghiu, Iulia ^[1]

---

1. Department of Microelectronics and Information Technology, Royal Institute of Technology (KTH), Electrum 229, 164 40 Kista (Sweden)

We propose a generalization of quantum teleportation: the so-called many-to-many quantum communication of the information of a d-level system from N spatially separated senders to M>N receivers situated at different locations. We extend the concept of asymmetric telecloning from qubits to d-dimensional systems. We investigate the broadcasting of entanglement by using local 1{yields}2 optimal universal asymmetric Pauli machines and show that the maximal fidelities of the two final entangled states are obtained when symmetric machines are applied. Cloning of entanglement is studied using a nonlocal optimal universal asymmetric cloning machine and we show that the symmetric machine optimally copies the entanglement. The 'many-to-many' teleportation scheme is applied in order to distribute entanglement shared between two observers to two pairs of spatially separated observers.

• OSTI ID: 20634101
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
CORRELATIONS
DATA TRANSMISSION
ENERGY LEVELS
INFORMATION
INFORMATION THEORY
QUANTUM MECHANICS