Saberi, Hamed and Mardoukhi, Yousof (2012) Sequential quantum cloning under real-life conditions. PHYSICAL REVIEW A, 85 (5): 052323. ISSN 1050-2947,
Full text not available from this repository.Abstract
We consider a sequential implementation of the optimal quantum cloning machine of Gisin and Massar and propose optimization protocols for experimental realization of such a quantum cloner subject to the real-life restrictions. We demonstrate how exploiting the matrix-product state (MPS) formalism and the ensuing variational optimization techniques reveals the intriguing algebraic structure of the Gisin-Massar output of the cloning procedure and brings about significant improvements to the optimality of the sequential cloning prescription of Delgado et al. [Phys. Rev. Lett. 98, 150502 (2007)]. Our numerical results show that the orthodox paradigm of optimal quantum cloning can in practice be realized in a much more economical manner by utilizing a considerably lesser amount of informational and numerical resources than hitherto estimated. Instead of the previously predicted linear scaling of the required ancilla dimension D with the number of qubits n, our recipe allows a realization of such a sequential cloning setup with an experimentally manageable ancilla of dimension at most D = 3 up to n = 15 qubits. We also address satisfactorily the possibility of providing an optimal range of sequential ancilla-qubit interactions for optimal cloning of arbitrary states under realistic experimental circumstances when only a restricted class of such bipartite interactions can be engineered in practice.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EXPERIMENTAL REALIZATION; SINGLE PHOTONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 May 2020 09:41 |
| Last Modified: | 13 May 2020 09:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18713 |
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