Atoms from proton

3000 atoms from a single proton.

Yesterday the researcher of MIT (Massachusetts Institute of Technology) published a report which provide information about a new technique of entangle 30000 and more atoms using a photon.

The technique provides a realistic method to generate large ensembles of entangled atoms, which are key components for realizing more-precise atomic clocks.

                               

The Lester Wolfe Professor in MIT's Department of Physics, and the paper's senior author said that "You can make the argument that a single photon cannot possibly change the state of 3,000 atoms, but this one photon does -- it builds up correlations that you didn't have before,"  He also added that "We have basically opened up a new class of entangled states we can make, but there are many more new classes to be explored."

MIT quantum physicist Vladan Vuletić and colleagues bounced photons between two mirrors in a space that contained about 3,100 rubidium atoms cooled to nearly absolute zero. Occasionally the polarization of a photon changed slightly, indicating that the photon had interacted with the atoms. Measurements revealed that each brief interaction coaxed at least 2,700 of the atoms to become entangled.