Coherent Matter-Wave Manipulation in the Diabatic Limit

Abstract

Guided systems for coherent matter waves are expected to offer substantial improvements over unguided systems, but adiabatic coupler proposals have proven difficult to realize. We outline instead considerations for a coherence-preserving diabatic approach enabling filters, couplers, and interferometers that can accept multimode guide inputs of up to magneto-optical-trap temperatures.

Matter-wave chaos with a cold atom in a standing-wave laser field

“…As to possible practical applications of the results obtained we mention atomic lithography to produce small-scale complex prints of cold atoms (see, for example, beautiful experiments on coherent matter-wave manipulation [22,23,24]), new ways to manipulate atomic motion in optical lattices by varying the atom-filed detuning and atomic ratchets with cold atoms.…”

Distributed quasi-Bragg beam splitter in crossed atomic waveguides

“…The reflection process is indeed taking place on time-scales which are comparable to those set by the radial frequency of the waveguides and the transfer of the atoms from WG1 to WG2 results in a non-adiabatic process. For reducing these effects, a possibility consists in decreasing the angle of intersection between the waveguides ( for the experimental realization presented here) 10 . Another solution consists in using waveguides of even smaller size than the ones reported in Fig.…”

“…For all these applications, it is of primary importance to develop appropriate techniques to control the dynamics of the atoms in the waveguides, starting from the basic building block of any circuit and interferometer: the beam splitter. Coherent beam splitters have been realized for Bose-Einstein condensates (BECs) trapped in double-well potentials 7 , guided in linear optical waveguides 8 , and in Y-shaped waveguides with a small opening angle 9, 10 . However an integrated splitter able to continuously separate a guided atomic cloud and to spatially deflect it by a large and arbitrary angle has not been realized yet.…”

Near-surface quantum states of neutrons in the gravitational and centrifugal potentials

“…¤ÓÂÄËÕÂÙËÑÐÐÞÇ ÍÄÂÐÕÑÄÞÇ ÔÑÔÕÑâÐËâ µ·¯ÒÓÇAEÑÔÕÂÄÎâáÕ ÖÐËÍÂÎßÐÖá ÄÑÊÏÑÉÐÑÔÕß ËÊÖÚÇÐËâ ÄÊÂËÏÑAEÇÌÔÕÄËâ ÍÄÂÐÕÑÄÑÌ ÔËÔ-ÕÇÏÞ Ô ÅÓÂÄËÕÂÙËÑÐÐÞÏ ÒÑÎÇÏ. ¿ÍÔÒÇÓËÏÇÐÕÞ Ä ÅÇÑÏÇÕ-ÓËË, ÃÎËÊÍÑÌ Í ÅÇÑÏÇÕÓËË ÒÓÑÄÇAEÈÐÐÞØ Ë ÒÎÂÐËÓÖÇÏÞØ ÐÇÌÕÓÑÐÐÞØ àÍÔÒÇÓËÏÇÐÕÑÄ, ÑÃÔÖÉAEÂáÕÔâ ÒÓËÏÇÐË-ÕÇÎßÐÑ Í ÖÎßÕÓÂØÑÎÑAEÐÞÏ ÂÕÑÏÂÏ, ÐÂÒÓËÏÇÓ, Ä ÓÂÃÑÕÂØ [51,52]. ¤ÓÂÄËÕÂÙËÑÐÐÞÇ ÔÄÑÌÔÕÄ ÂÐÕËÏÂÕÇÓËË, ÄÑÊ-ÏÑÉÐÑ, ÏÑÅÖÕ ÃÞÕß ËÊÖÚÇÐÞ ÒÓË ÍÄÂÐÕÑÄÑÏ ÑÕÓÂÉÇÐËË ÖÎßÕÓÂØÑÎÑAEÐÞØ ÂÕÑÏÑÄ ÂÐÕËÄÑAEÑÓÑAE ÑÕ ÅÑÓËÊÑÐÕÂÎß-ÐÑÌ ÒÑÄÇÓØÐÑÔÕË [53,54] Ä ÂÐÂÎÑÅËÚÐÑÌ ÅÇÑÏÇÕÓËË.…”