Quantum Computing Using Single Photons and the Zeno Effect
by
J.D. Franson
Johns Hopkins University
Coauthors: B.C. Jacobs and T.B. Pittman

We show that the quantum Zeno effect can be used to suppress the errors that would otherwise occur in a linear optics approach to quantum computing. This allows quantum logic gates to be implemented without the need for ancilla or measurements, including a logic operation that is similar to the square-root of SWAP. The operation of these devices depends on the fact that the Zeno effect can force photons to behave like non-interacting fermions instead of bosons. In applications of this kind, the Zeno effect can be viewed as a form of quantum control.

Paper reference: arXiv:quant-ph/0401133

Date received: February 26, 2004