Quantum copying: A network
- 1 November 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 56 (5) , 3446-3452
- https://doi.org/10.1103/physreva.56.3446
Abstract
We present a network consisting of quantum gates that produces two imperfect copies of an arbitrary qubit. The quality of the copies does not depend on the input qubit. We also show that for a restricted class of inputs it is possible to use a very similar network to produce three copies instead of two. For qubits in this class, the copy quality is again independent of the input and is the same as the quality of the copies produced by the two-copy network.Keywords
All Related Versions
This publication has 9 references indexed in Scilit:
- Optimal Quantum Cloning MachinesPhysical Review Letters, 1997
- Quantum copying: Fundamental inequalitiesPhysical Review A, 1997
- Broadcasting of entanglement via local copyingPhysical Review A, 1997
- Separability of mixed states: necessary and sufficient conditionsPhysics Letters A, 1996
- Quantum copying: Beyond the no-cloning theoremPhysical Review A, 1996
- Separability Criterion for Density MatricesPhysical Review Letters, 1996
- Noncommuting Mixed States Cannot Be BroadcastPhysical Review Letters, 1996
- Elementary gates for quantum computationPhysical Review A, 1995
- A single quantum cannot be clonedNature, 1982