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Title: | Sequential Quantum Cloning |
Authors: | Delgado, Y.; Lamata, Lucas CSIC ORCID; León, Juan CSIC ORCID; Salgado, D.; Solano, E. | Keywords: | [PACS] Quantum entanglement production, characterization, and manipulation [PACS] Quantum cryptography |
Issue Date: | 13-Apr-2007 | Publisher: | American Physical Society | Citation: | Physical Review Letters 98(15): 150502 (2007) | Abstract: | Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequential quantum cloning, 1 -> M, and prove that the minimal dimension D of the ancilla grows linearly with the number of clones M. In particular, we obtain D=2M for symmetric universal quantum cloning and D=M+1 for symmetric phase-covariant cloning. Furthermore, we provide a recipe for the required ancilla-qubit interactions in each step of the sequential procedure for both cases. | Description: | 4 pages, 1 table.-- PACS nrs.: 03.67.Mn; 03.67.Dd.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0607105 | Publisher version (URL): | http://dx.doi.org/10.1103/PhysRevLett.98.150502 | URI: | http://hdl.handle.net/10261/12268 | DOI: | 10.1103/PhysRevLett.98.150502 | ISSN: | 0031-9007 |
Appears in Collections: | (CFMAC-IFF) Artículos |
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