Asymmetric quantum telecloning of d-level systems and broadcasting of entanglement to different locations using the 'many-to-many' communication protocol
- 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, Vol. 67, Issue 1; Other Information: DOI: 10.1103/PhysRevA.67.012323; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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