Phys. Rev. A 76, 052305 (2007) [4 pages]

Local cloning of entangled qubits

Abstract

References

Citing Articles (4)

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Sujit K. Choudhary^*, Samir Kunkri^†, Ramij Rahaman^‡, and Anirban Roy^§
Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700 108, India

Received 1 June 2007; published 7 November 2007

We discuss the exact cloning of orthogonal but entangled qubits under local operations and classical communication. The amount of entanglement necessary in a blank copy is obtained for various cases. Surprisingly, this amount is more than 1 ebit for certain sets of two nonmaximal but equally entangled states of two qubits. To clone any three Bell states, at least log₂ 3 ebit is necessary.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.76.052305

DOI:

10.1103/PhysRevA.76.052305

PACS:

03.67.Hk, 03.67.Mn

^*sujit_r@isical.ac.in

^†skunkri_r@isical.ac.in

^‡ramij_r@isical.ac.in

^§anirb@qis.ucalgary.ca

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Phys. Rev. A 76, 052305 (2007) [4 pages]

Local cloning of entangled qubits