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Phys. Rev. A 66, 024307 (2002) [4 pages]

Cloning of symmetric d-level photonic states in physical systems

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Heng Fan1, Gregor Weihs2, Keiji Matsumoto1, and Hiroshi Imai1
1Quantum Computing and Information Project, ERATO, Japan Science and Technology Corporation, Daini Hongo White Building 201, Hongo 5-28-3, Bunkyo-ku, Tokyo 133-0033, Japan
2Ginzton Laboratory, Stanford University, Stanford, California 94305

Received 8 February 2002; published 8 August 2002

Optimal procedures play an important role in quantum information. It turns out that some naturally occurring processes as emission of light from an atom can realize optimal transformations. Here we study how arbitrary symmetric states of a number of d-level systems can be cloned using a multilevel atomic system. It is shown that optimality is always ensured even though the output number of systems is probabilistic.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.024307
DOI:
10.1103/PhysRevA.66.024307
PACS:
03.67.Lx, 03.65.Ta, 32.80.Qk
 
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