Asim Orhan Barut

Reflecting Slow Atoms from a Micromaser Field

Excited atoms incident upon the entrance port of a maser cavity will be reflected half of the time, if the atoms are slow enough, even when the maser field is in its vacuum state. This happens because the interaction strength, between the atom and the maser field, changes strongly when passing from the exterior to the interior of the cavity.

On the theory of the Stern-Gerlach apparatus

We present, in various limits, analytical expressions for the center-of-mass wave function of a spin-1/2 atom as it is deflected by a Stern-Gerlach apparatus.

Quantum, space, and time--the quest continues : studies and essays in honour of Louis de Broglie, Paul Dirac, and Eugene Wigner

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The Energy-Momentum Tensor for Electromagnetic Interactions

We compute the energy tensor and the energy-momentum tensor for electrodynamics coupled to the current of a charged scalar field and for electrodynamics coupled tothe current of a Dirac spinor field, without using the equations of motion.