The interference pattern of the resonance fluorescence from a J51/2 to J51/2 transition of two identical atoms confined in a three-dimensional harmonic potential is calculated. The thermal motion of the atoms is included. Agreement is obtained with experiments @U. Eichmann et al., Phys. Rev. Lett. 70,...

Atoms moving in an accelerating optical lattice exhibit quantum behavior such as Bloch oscillations, Wannier-Stark ladders and tunneling’phenomena usually associated with electrons in a crystalline solid.

Observations of the oscillatory exchange of excitation between N two-state atoms and a single mode of a highfinesse optical cavity are reported in a regime of weak-field excitation and of comparable atomic and cavity damping rates. The observed frequencies of oscillation, approximately given by g p N,...

We report the first observation of interference effects in the light scattered from two trapped atoms. The visibility of the fringes can be explained in the framework of Bragg scattering by a harmonic crystal and simple ”which path” considerations of the scattered photons. If the light...

We have observed interference fringes, like those in Young’s classic experiment, in the laser light scattered by two trapped atoms. The interference fringes are present only in one polarization of the scattered light. The polarization dependence is related to the complementarity principle, which forbids...

When a quantum state is subjected to a measurement and the state is not an eigenstate of the dynamical variable being measured, the outcome is unpredictable. Only the probabilities of the various possible outcomes are predicted by theory. This phenomenon is sometimes discussed in terms of ‘wavefunction...

We have applied experimental techniques that were developed for use in atomic frequency standards and clocks to investigations of local Lorentz invariance, the linearity of quantum mechanics, and anomalous long-range spin-dependent forces. These experiments used a hyperfine transition in 9Be+ ions in...

Measurements of internal energy states of atomic ions confined in traps can be used to illustrate fundamental properties of quantum systems, because long relaxation times and observation times are available. In the experiments described here, a single ion or a few identical ions were prepared in...

We describe a configuration for a linear Paul rf ion trap. This trap can store a long string of ions with a small second-order Doppler shift, comparable to that achieved with a single ion in a quadrupole Paul trap. Crystallized strings of trapped ions, as well as more complicated structures, have...

Resonances in atomic ions can be used to search for new, weak, spin-dependent interactions. Upper limits on anomalous dipole-monopole and dipole-dipole couplings for the neutron and electron are determined by examining hyperfine resonances in stored 9Be+ ions. These experiments also place strict limits...