Probabilistic model of fault detection in quantum circuits

It is shown that the fault testing for quantum circuits does not follow conventional classical techniques. If probabilistic gate like Hadamard gate is included in a circuit then the classical notion of test vector is shown to fail. We have reported several new and distinguishing features of quantum fault and also presented a general methodology for detection of functional faults in a quantum circuit. The technique can generate test vectors for detection of di erent kinds of fault. Speci c examples are given and time complexity of the proposed quantum fault detection algorithm is reported.