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Dynamics of a BEC colliding with a time-dependent dipole barrier

M. Siercke, Chris W. Ellenor, R. Chang +2 more

We report on the progress of experiments to study the interaction of a BEC with a dipole barrier. Goals include observation of transitory enhancement of high momentum components and realization of a SPIDER-like tomographical technique.

Frontiers in OpticsJan 1, 20060 citations

Initial experiments with an all-optical spinor BEC

Nathan E. Lundblad, Robert J. Thompson, David C. Aveline +1 more

We report on experiments performed with an all-optical spinor BEC, including gravity-aided evaporation, a novel atom laser and a measurement of the density dependence of the spinor dynamics.

Conference on Lasers and Electro-OpticsJan 1, 20060 citations

Collisional Transitory Enhancement of the High Momentum Components of a Quantum Wave Packet

S. Brouard, Juan Gonzalo Muga

A classically forbidden, transitory enhancement of the high positive momentum components of a quantum wave packet during its collision with a potential barrier is described. A quantity is defined to measure its importance; the universality of the effect is justified, and its main features are studied with the aid of an analytically solvable model. Its relation to other ``anomalously high velocities'' is also examined.

Physical Review LettersSep 28, 199816 citations

Matter wave bistability with a momentum chirped Bose-Einstein condensate

Mikhail Mamaev, Nicholas Mantella, Noah P. Baker +2 more

While a Fabry-Perot (FP) cavity interferometer is a standard tool in modern optics, analogous physics can also be observed with matter waves such as Bose-Einstein condensates (BECs). Interatomic collisions in BECs can induce nonlinear features such as multi-valued transmission spectra for interferometry experiments. Observation of interaction effects in the matter-wave analogue of FP interferometry has not yet been experimentally achieved, mostly due to broadening of transmission peaks by interaction-induced shifts of cavity resonances. In this work, we theoretically show that this limitation can be overcome by engineering a momentum chirp in a BEC wavepacket. By balancing this chirp against the dynamical mean-field energy shift of the cavity during transmission, we predict enhanced resonant spectra and bistability features due to interaction-assisted tunneling that would be otherwise inaccessible. We show that this physics is readily observable with quasi-one-dimensional BECs of cold atoms colliding with a pair of light-induced Gaussian potential barriers forming the cavity. We also benchmark the requisite optimum chirp needed and characterize the contrast of near-discontinuous FP transmission spectra at an interacting resonance. Our findings enable the realization of technologies like matter-wave switching protocols, and high-precision velocity measurements; estimates of achievable sensitivity for the latter are provided.While a Fabry-Perot (FP) cavity interferometer is a standard tool in modern optics, analogous physics can also be observed with matter waves such as Bose-Einstein condensates (BECs). Interatomic collisions in BECs can induce nonlinear features such as multi-valued transmission spectra for interferometry experiments. Observation of interaction effects in the matter-wave analogue of FP interferometry has not yet been experimentally achieved, mostly due to broadening of transmission peaks by interaction-induced shifts of cavity resonances. In this work, we theoretically show that this limitation can be overcome by engineering a momentum chirp in a BEC wavepacket. By balancing this chirp against the dynamical mean-field energy shift of the cavity during transmission, we predict enhanced resonant spectra and bistability features due to interaction-assisted tunneling that would be otherwise inaccessible. We show that this physics is readily observable with quasi-one-dimensional BECs of cold atoms colliding with a pair of light-induced Gaussian potential barriers forming the cavity. We also benchmark the requisite optimum chirp needed and characterize the contrast of near-discontinuous FP transmission spectra at an interacting resonance. Our findings enable the realization of technologies like matter-wave switching protocols, and high-precision velocity measurements; estimates of achievable sensitivity for the latter are provided.

cond-mat.quant-gasCross-listedarXiv:2610.08942Oct 8, 20260 citations

Modeling ion dynamics for BEC-ion interaction experiments

Andrew T. Cadotte, David Alexander Anderson, Georg A. Raithel

Bulletin of the American Physical SocietyJun 16, 20110 citations

Interaction of a BEC with Dipole Barriers

M. Siercke, Chris W. Ellenor, Fan Wang +3 more

Bulletin of the American Physical SocietyMay 18, 20050 citations

Dynamics of a BEC colliding with a time-dependent dipole barrier

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Dynamics of a BEC colliding with a time-dependent dipole barrier

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