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KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
2008 (English)In: Romanian Journal of Physics, ISSN 1221-146X, Vol. 53, no 5-6, 725-737 p.Article in journal (Refereed) Published
Abstract [en]

We propose two different implementations of an asymmetric two-output probabilistic quantum processor. One of them is constructed by combining asymmetric telecloning with a quantum gate array. We analyze the efficiency of this processor by evaluating the fidelities between the desired operation and the ones generated by the processor and show that the two output states are the same as the ones produced by the optimal universal asymmetric Pauli cloning machine and have a success probability of 1/2. We show further that we can perform the same one-qubit operation with unity probability at the cost of using nonlocal operations. We finally generalize the two schemes for D-level systems and find that the local ones are successful with a probability of 1/D and the nonlocal generalized scheme is always successful.

Place, publisher, year, edition, pages
2008. Vol. 53, no 5-6, 725-737 p.
Keyword [en]
quantum cloning, quantum processor, gate arrays, computer, cloning
URN: urn:nbn:se:kth:diva-18237ISI: 000264109600011ScopusID: 2-s2.0-49149108852OAI: diva2:336283
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Björk, Gunnar
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