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Institute of Optics

bar_yell

Multi-valued logic gates for quantum computation

Ashok Muthukrishnan and C. R. Stroud, Jr.

Phys. Rev. A 62, 052309 (2000).


We develop a multivalued logic for quantum computing for use in multi-level quantum systems, and discuss the practical advantages of this approach for scaling up a quantum computer. Generalizing the methods of binary quantum logic, we establish that arbitrary unitary operations on any number of d-level systems (d>2) can be decomposed into logic gates that operate on only two systems at a time. We show that such multivalued logic gates are experimentally feasible in the context of the linear ion trap scheme for quantum computing. By using d levels in each ion in this scheme, we reduce the number of ions needed for a computation by a factor of log2d


Click here to download the .pdf version of the paper muthukrishnan001.pdf (108 KB)


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