Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:cond-mat/0209024

Dynamics and phase evolution of Bose-Einstein condensates in one-dimensional optical lattices

O. Morsch, Matteo Cristiani, Jörg Helge Müller, D. Ciampini, E. Arimondo

Published Sep 2, 2002• 3 citations
arXivHTMLPDF

Abstract

We report experimental results on the dynamics and phase evolution of Bose-Einstein condensates in 1D optical lattices. The dynamical behaviour is studied by adiabatically loading the condensate into the lattice and subsequently switching off the magnetic trap. In this case, the condensate is free to expand inside the periodic structure of the optical lattice. The phase evolution of the condensate, on the other hand, can be studied by non-adiabatically switching on the periodic potential. We observe decays and revivals of the interference pattern after a time-of-flight.

DOI
10.48550/arxiv.cond-mat/0209024

Related papers

Free expansion of a Bose-Einstein condensate in a one-dimensional optical lattice

O. Morsch, Matteo Cristiani, Jörg Helge Müller +2 more

We have experimentally investigated the free expansion of a Bose-Einstein condensate in an array of two-dimensional traps created by a one-dimensional optical lattice. If the condensate held in a magnetic trap is loaded adiabatically into the lattice, the increase in chemical potential due to the additional periodic potential is reflected in the expansion of the condensate after switching off the magnetic trap. We have calculated the chemical potential from measurements of the transverse expansion of the condensate as a function of the lattice parameters.

arXiv:cond-mat/0204528•Physical Review A•Aug 8, 2002•52 citations

Phase diffusion of Bose–Einstein condensates in a one-dimensional optical lattice

Hongwei Xiong, Shujuan Liu, Guoxiang Huang +1 more

We investigate the phase diffusion of a Bose–Einstein condensate (BEC) confined in the combined potential of a magnetic trap and a one-dimensional optical lattice. We show that the phase diffusion of the condensate in the whole optical lattice is evident and can be measured from the interference pattern of expanding subcondensates after the optical lattice is switched off. The maximum density of the interference pattern decreases significantly due to the mixing of the phase diffusion that appears in different subcondensates. This suggests a way to detect experimentally the notable phase diffusion of BECs.

arXiv:cond-mat/0212087•Journal of Physics B Atomic Molecular and Optical Physics•Jul 18, 2003•7 citations

Decay and revival of phase coherence of a Bose-Einstein condensate in a one-dimensional lattice

O. Morsch, Jörg Helge Müller, D. Ciampini +5 more

The dynamics of a Bose-Einstein condensate nonadiabatically loaded into a one-dimensional optical lattice is studied by analyzing the phase coherence between sites along the lattice as well as the radial profile of the condensate after a time-of flight. A simple model is proposed that predicts the short-time dephasing as a function of the condensate parameters. In the radial direction, heavily damped oscillations are observed, as well as an increase in the condensate temperature. These findings are interpreted as a rethermalization due to dissipation of the initial condensate excitations into high-lying modes.

arXiv:cond-mat/0208162•Physical Review A•Mar 26, 2003•24 citations

SIGNATURES OF DYNAMICAL INSTABILITY OF BOSE–EINSTEIN CONDENSATES IN 1D OPTICAL LATTICES

D. Ciampini, O. Morsch, E. Arimondo

The onset of dynamical instabilities of Bose–Einstein condensates in optical lattices due to the dephasing of the condensate wavefunction is observed through the decay of the visibility of the interference pattern in time-of-flight and the growth of the radial width of the condensate.

Fluctuation and Noise Letters•Jun 1, 2013•0 citations

Adiabatic loading of a Bose–Einstein condensate in a 3D optical lattice

Tatjana Gericke, Fabrice Gerbier, Artur Widera +3 more

We experimentally investigate the adiabatic loading of a Bose–Einstein condensate into an optical lattice potential. The generation of excitations during the ramp is detected by a corresponding decrease in the visibility of the interference pattern observed after free expansion of the cloud. We focus on the superfluid regime, where we show that the limiting time scale is related to the redistribution of atoms across the lattice by single-particle tunnelling.

arXiv:cond-mat/0603590•Journal of Modern Optics•Aug 28, 2006•50 citations

Observation of Dynamical Instability for a Bose-Einstein Condensate in a Moving 1D Optical Lattice

L. Fallani, L. De Sarlo, Jessica Lye +4 more

We have experimentally studied the unstable dynamics of a harmonically trapped Bose-Einstein condensate loaded into a 1D moving optical lattice. The lifetime of the condensate in such a potential exhibits a dramatic dependence on the quasimomentum state. This is unambiguously attributed to the onset of dynamical instability, after a comparison with the predictions of the Gross-Pitaevskii theory. Deeply in the unstable region we observe the rapid appearance of complex structures in the atomic density profile, as a consequence of the condensate phase uniformity breakdown.

arXiv:cond-mat/0404045•Physical Review Letters•Sep 29, 2004•322 citations
We report experimental results on the dynamics and phase evolution of Bose-Einstein condensates in 1D optical lattices. The dynamical behaviour is studied by adiabatically loading the condensate into the lattice and subsequently switching off the magnetic trap. In this case, the condensate is free to expand inside the periodic structure of the optical lattice. The phase evolution of the condensate, on the other hand, can be studied by non-adiabatically switching on the periodic potential. We observe decays and revivals of the interference pattern after a time-of-flight.
We have experimentally investigated the free expansion of a Bose-Einstein condensate in an array of two-dimensional traps created by a one-dimensional optical lattice. If the condensate held in a magnetic trap is loaded adiabatically into the lattice, the increase in chemical potential due to the additional periodic potential is reflected in the expansion of the condensate after switching off the magnetic trap. We have calculated the chemical potential from measurements of the transverse expansion of the condensate as a function of the lattice parameters.
We investigate the phase diffusion of a Bose–Einstein condensate (BEC) confined in the combined potential of a magnetic trap and a one-dimensional optical lattice. We show that the phase diffusion of the condensate in the whole optical lattice is evident and can be measured from the interference pattern of expanding subcondensates after the optical lattice is switched off. The maximum density of the interference pattern decreases significantly due to the mixing of the phase diffusion that appears in different subcondensates. This suggests a way to detect experimentally the notable phase diffusion of BECs.
The dynamics of a Bose-Einstein condensate nonadiabatically loaded into a one-dimensional optical lattice is studied by analyzing the phase coherence between sites along the lattice as well as the radial profile of the condensate after a time-of flight. A simple model is proposed that predicts the short-time dephasing as a function of the condensate parameters. In the radial direction, heavily damped oscillations are observed, as well as an increase in the condensate temperature. These findings are interpreted as a rethermalization due to dissipation of the initial condensate excitations into high-lying modes.
We have experimentally studied the unstable dynamics of a harmonically trapped Bose-Einstein condensate loaded into a 1D moving optical lattice. The lifetime of the condensate in such a potential exhibits a dramatic dependence on the quasimomentum state. This is unambiguously attributed to the onset of dynamical instability, after a comparison with the predictions of the Gross-Pitaevskii theory. Deeply in the unstable region we observe the rapid appearance of complex structures in the atomic density profile, as a consequence of the condensate phase uniformity breakdown.