Purifying Two-Bit Quantum Gates and Joint Measurements in Cavity QED
S. J. van Enk, J. I. Cirac, P. Zoller · Physical Review Letters · 1997
Using a cavity QED setup we show how to implement a particular joint measurement on two atoms in a fault tolerant way. Based on this scheme, we illustrate how to realize quantum communication over a noisy channel when local operations are subject to errors. We also present a scheme to perform and purify a fundamental two-bit gate.