QUANTUM BEAT EXPERIMENTS USING A COLD NEUTRON SPIN INTERFEROMETER

Easy quantum beat experiments have been developed using a new cold neu tron spin interferometer, which brings us easy observation of quantum beat phenomena. The quantum heat is created by the coherent superposit ion of the spin eigenstates of cold neutron with different energy stat es; which are produced with two radio-frequency flippers. We observed quantum beat phenomena with a range of frequency from 4 kHz to 10(-5) Hz, which correspond to the energy differences from 1.66 x 10(-11) eV to 4.1 x 10(-20) eV. The principle and the arrangement of the quantum beat experiment are discussed, and typical measurement data are presen ted. Some applications of the quantum beat experiments are briefly pro posed.