Two-atom interferometer

This Letter presents a nonclassical mechanism of two-atom interferometry. The interferometer introduces two different yet indistinguishable alternatives for randomly paired atoms to create joint atom-detection event. superposition amplitudes yields interference with peculiar features which outshine the classic atom interferometer: (1) is still observable when time delay greater than coherence beam and (2) may eliminate phase noises, including background, variation, turbulence, Raman laser induced thereby allowing higher sensitivity stability sensing achievable by interferometers. These are crucial in high sensitivity-accuracy acceleration rotation measurements. presented concept can be adapted other matter-wave interferometers, such as two-neutron two-electron interferometer.