Quantum decoherence behavior is observed and studied on a 2 qubit NMR quantum computer. Experimental results show a good agreement between theory and experiment. The scheme can be generalized to the case that the environment is composed of N independent qubits.
An entangled state is prepared using nuclear magnetic resonance (NMR). And its attribute is shown in NMR spectra. The relation between quantum entanglement and coherence is discussed by studying the evolution of entangled state under decoherence.
