Deflection of atoms by a pulsed standing wave: effects of laser field coherence
نویسندگان
چکیده
Deflection of two-level atoms by a pulsed standing wave with a pulse duration of a few nanoseconds is studied by using the density matrix formalism. The effect of the limited coherence time of the pulsed laser field on the momentum distribution of the deflected atoms is investigated. In particular, we determine the coherence time at which the deflection by a pulsed standing wave differs significantly from the zero-relaxation case.
منابع مشابه
Pulsed standing-wave mirror for neutral atoms and molecules
Reflection of neutral atoms and molecules by a pulsed standing wave with a duration on the order of nanoseconds is studied. It is shown that, with a suitable choice of the laser parameter values, each period of the standing-wave pattern functions as an independent mirror, thus providing a novel way to manipulate large samples of neutral gas-phase particles even with a single laser pulse. At mod...
متن کاملMetallography Investigation of Thermal Wave Control by Magneto-Static Field
In this paper we have studied the effect of magneto-static field onpropagation of thermal wave generated in metal by pulsed laser. In fact this interactiongenerate acoustic wave in different mechanisms. However, always the commonmechanism in the interactions of laser pulse and metal is the thermo-elastic wavegeneration. Applying the suitable magneto-static field on the s...
متن کاملDiffraction of a superfluid fermi gas by an atomic grating.
An atomic grating generated by a pulsed standing-wave laser field is proposed to manipulate the superfluid state in a quantum degenerate gas of fermionic atoms. We show that in the presence of atomic Cooper pairs, the density oscillations of the gas caused by the atomic grating exhibit a much longer coherence time than that in the normal Fermi gas. Our result indicates that the technique of a p...
متن کاملCoupled atomic coherences induced by a standing wave
Atomic coherence effects with a strong standing-wave coupling field on a four-level system of hot Rb atoms are investigated. Amplitude modulation and phase modulation of the strong standing-wave field are coherently coupled in linear and nonlinear atomic polarizations in various multi-wave mixing processes. Such coupled atomic coherence effect leads to one-photon triple-bandpass filters in an e...
متن کاملOutput of a pulsed atom laser
The experimental breakthrough to Bose-Einstein condensation with small numbers of atoms in magnetic traps [1] has raised much interest in the properties of mesoscopic quantum gases. Bose-Einstein condensates with atoms in a single magnetic sublevel have been studied experimentally and theoretically. The recent experimental and theoretical investigations of interference between two independent B...
متن کامل