Optimal ancilla-free phase-covariant telecloning of qudits via nonmaximally entangled states
arXiv:1109.5335 · doi:10.1088/0256-307X/27/10/100303
Abstract
We study the one-to-two phase-covariant telecloning of a qudit without ancilla. We show that the fidelity of the two clones can reach that of the clones in the optimal ancilla-based one-to-two phase-covariant cloning and telecloning, i.e., the limitation of quantum mechanics. More interestingly, it is a nonmaximally entangled state rather than the maximally entangled state that can be used to realize such a telecloning task.
The improvement of Phys. Rev. A 79, 064306 (2009); see also Chin. Phys. Lett. 27, 100303 (2010)
References in corpus (7)
- Entanglement Percolation in Quantum Networks
- Entanglement Distribution in Pure-State Quantum Networks
- Economical Phase-Covariant Cloning of Qudits
- Nonmaximally entangled states can be better for multiple linear optical teleportation
- Fibre-optics implementation of asymmetric phase-covariant quantum cloner
- Classification of GHZ-type, W-type and GHZ-W-type multiqubit entanglements
- Reduced randomness in quantum cryptography with sequences of qubits encoded in the same basis