研究目的

To investigate the discrimination of weak coherent states of light with significant overlaps by nondestructive measurements on the light states through measuring atomic states that are entangled to the coherent states via dipole coupling, aiming to attain a probability of error extremely close to the Helstrom bound.

研究成果

The study demonstrates that the proposed nondestructive measurement scheme can achieve an error probability very close to the Helstrom bound for discriminating binary coherent states. The use of atom–light interaction and atomic measurements offers a promising approach for quantum communication tasks, with the added advantage of allowing subsequent measurements to further reduce error probabilities.

研究不足

The implementation's precision depends on the control of the atom–light interaction strength and the efficiency of atomic measurements. The scheme may face challenges in experimental realization due to the need for precise control over the interaction parameters and the potential for decoherence in the atomic states.