4.5 Article

Scalable implementation of ancilla-free optimal 1 → M phase-covariant quantum cloning by combining quantum Zeno dynamics and adiabatic passage

Journal

PHYSICS LETTERS A
Volume 375, Issue 40, Pages 3504-3508

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2011.08.012

Keywords

Quantum cloning; Quantum Zeno dynamics

Funding

  1. Natural Science Foundation of Jilin Province, China [201115007]
  2. National Natural Science Foundation of China [61068001, 11064016]

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A scalable way for implementation of ancilla-free optimal 1 -> M phase-covariant quantum cloning (PCC) is proposed by combining quantum Zeno dynamics and adiabatic passage. An optimal 1 -> M PCC can be achieved directly from the existed optimal 1 -> (M - 1) PCC without excited states population during the whole process. The cases for optimal 1 -> 3 (4) PCCs are discussed detailedly to show that the scheme is robust against the effect of decoherence. Moreover, the time for carrying out each cloning transformation is regular, which may reduce the complexity for achieving the optimal PCC in experiment. (C) 2011 Elsevier B.V. All rights reserved.

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