Scheme for Implementation of Ancillary-Free 1 → 3 Optimal Phase-Covariant Quantum Cloning with Trapped Ions

We propose a scheme to realize the economical 1 → M phase-covariant quantum cloning in 2-dimension with M Λ-type three-level atoms in an optical cavity. In our scheme, we do not require addressing and exactly manipulating on every atoms, never so much as controlling the time of interaction between atoms and photon. The success or failure of cloning can be determined simply by detecting the polarization of the photon leaking out of the cavity. With the use of an automatic feedback, the success probability of the scheme can be made to approach unity. And the desired output state is a superposition of different combination of two grounds states and thus is free from decoherence caused by spontaneous emission.

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Scheme for the implementation of the optimal economical phase-covariant quantum cloning machine with SQUID qubits in cavity QED

Physics Letters A ◽

10.1016/j.physleta.2007.01.022 ◽

2007 ◽

Vol 365 (1-2) ◽

pp. 74-78 ◽

Cited By ~ 6

Author(s):

Long-Bao Yu ◽

Wen-Hai Zhang ◽

Liu Ye

Keyword(s):

Cavity Qed ◽

Quantum Cloning ◽

Covariant Quantum

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Optimal symmetric economical phase-covariant quantum cloning

Physics Letters A ◽

10.1016/j.physleta.2006.09.002 ◽

2007 ◽

Vol 360 (6) ◽

pp. 726-730 ◽

Cited By ~ 18

Author(s):

Wen-Hai Zhang ◽

Long-Bao Yu ◽

Liu Ye ◽

Jie-Lin Dai

Keyword(s):

Quantum Cloning ◽

Covariant Quantum

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Linear optical scheme for implementing the universal and phase-covariant quantum cloning machines

Physics Letters A ◽

10.1016/j.physleta.2007.01.051 ◽

2007 ◽

Vol 366 (1-2) ◽

pp. 36-41 ◽

Cited By ~ 11

Author(s):

XuBo Zou ◽

Ke Li ◽

GuangCan Guo

Keyword(s):

Optical Scheme ◽

Quantum Cloning ◽

Covariant Quantum ◽

Linear Optical

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SCHEME FOR QUANTUM CLONING AND QUANTUM INFORMATION PROCESSING WITH TRAPPED IONS

Modern Physics Letters B ◽

10.1142/s0217984907013158 ◽

2007 ◽

Vol 21 (12) ◽

pp. 729-735

Author(s):

ZHI-MING ZHAN

Keyword(s):

Information Processing ◽

Quantum Information ◽

Quantum Information Processing ◽

Vibrational Mode ◽

Trapped Ions ◽

Distinct Advantage ◽

Quantum Cloning ◽

Universal Quantum ◽

Data Bus

In this paper, a scheme is presented to implement the 1→2 universal quantum cloning machine (UQCM) with trapped ions. In this way, we also show that quantum information can be directly transferred from one ion to another. The distinct advantage of the scheme lies in the fact that it does not use the vibrational mode as the data bus. The vibrational mode is only virtually excited, which makes our scheme insensitive to heating, provided the system remains in the Lamb–Dicke regime.

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