  The linear optics approach to quantum computing has several potential
advantages but the logic operations are probabilistic. Here we review the use
of the quantum Zeno effect to suppress the intrinsic failure events in these
kinds of devices, which would produce deterministic logic operations without
the need for ancilla photons or high-efficiency detectors. The potential
advantages of implementing Zeno gates using micro-cavities and
electromagnetically-induced transparency are discussed.
