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Atomic Nuclear Physics

Atom Interferometry by Paul R. Berman

By Paul R. Berman

The sphere of atom interferometry has accelerated swiftly in recent times, and todays study laboratories are utilizing atom interferometers either as inertial sensors and for precision measurements. Many researchers additionally use atom interferometry as a way of learning basic questions in quantum mechanics. Atom Interferometry includes contributions from theoretical and experimental physicists on the vanguard of this quickly constructing box. Editor Paul R. Berman contains a great stability of historical past fabric and up to date experimental results,providing a common evaluate of atom interferometry and demonstrating the promise that it holds for the longer term. Key positive aspects * comprises contributions from the various learn teams that experience pioneered this rising box * Discusses and demonstrates new features of the wave nature of atoms * Explains the various vital functions of atom interferometry, from a size of the gravitational consistent to atom lithography * Examines functions of atom interferometry to essentially vital quantum mechanics difficulties

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These orders form an interference pattern in the plane of the third grating, which acts as a mask to sample this pattern. The detector, located beyond the third grating, records the flux transmitted through the third grating. The 10 cm long interaction region with the 10 /zm thick copper foil between the two arms of the interferometer is positioned behind the second grating. An optical interferometer (thin lines are laser beams) measures the relative position of the 200 nm period atom gratings (which are indicated by vertical dashed lines).

Force), converted to a phase A~o = Ax kg by multiplying by the grating vector kg. The interference pattern, the envelope of the fringe pattern, and the fringes themselves all move as a unit in a potential gradient, following the classical trajectory of the atoms (Ehrenfest's theorem). VI. Measuring Atomic and Molecular Properties Atom interferometers will find wide application in the study of atomic and molecular interactions, particularly through measurements of the phase shifts due to differential interactions applied to the arms of the interferometer.

Data taken with the detector wire displaced from the atomic beam axis by a distance corresponding to a single photon recoil are shown in Fig. 8. In conducting our single-photon scattering experiments (see Section VII), we used this effect as a tool to align our laser beam relative to the atomic beam and to adjust the laser intensity to produce a rr-pulse, ensuring as nearly as possible that exactly one photon was scattered by each atom. I I 300- : - - ;::. o 200 ,9 ".. ~ . 9. . 1 O0 . :, ' q, I, .

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