Experimental Implementation of Quantum Computing with Macroscopic Ensemble of Quantum Spins

Abstract

We have carried out several ensemble quantum computing experiments by NMR spectroscopy with sample of carbon-13 labeled chloroform. Here we mainly demonstrate the experimental realization of quantum dense coding which can transmit two classical bits of information by coding one of the EPR pair. All the experiments were proceeded by preparing the pseudo-pure states, manipulating the qubits according to the algorithms and read out the final outcomes. The extracted data are in good agreement with the expected results.