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:1102.5188 · Physical Review A

Rapid nonadiabatic loading in an optical lattice

Xinxing Liu, Xiaoji Zhou, Wei Xiong, Thibault Vogt, Xuzong Chen

Published Jun 6, 2011• 24 citations
arXivHTMLPDF

Abstract

We present a scheme for nonadiabatically loading a Bose-Einstein condensate into the ground state of a one-dimensional optical lattice within a few tens of microseconds, i.e., typically in less than half the Talbot period. This technique of coherent control is based on sequences of pulsed perturbations, and the experimental results demonstrate its feasibility and effectiveness. As the loading process is much shorter than the traditional adiabatic loading time scale, this method may find many applications.

DOI
10.1103/physreva.83.063402

Related papers

High-Fidelity Rapid Ground-State Loading of an Ultracold Gas into an Optical Lattice

Shumpei Masuda, Katsuhiro Nakamura, Adolfo del Campo

A protocol is proposed for the rapid coherent loading of a Bose-Einstein condensate into the ground state of an optical lattice, without residual excitation associated with the breakdown of adiabaticity. The driving potential required to assist the rapid loading is derived using the fast-forward technique, and generates the ground state in any desired short time. We propose an experimentally feasible loading scheme using a bichromatic lattice potential, which approximates the fast-forward driving potential with high fidelity.

arXiv:1407.3212•Physical Review Letters•Aug 7, 2014•77 citations

Nonadiabatic loading of a Bose-Einstein condensate into the ground state of an optical lattice

Angela S. Mellish, G. Duffy, Callum R. McKenzie +2 more

We present a scheme for rapidly loading a Bose-Einstein condensate into a single Bloch state of a weak optical lattice at a quasimomentum of $q=\ensuremath{\Elzxh}k.$ Rabi cycling of the Bose-Einstein condensate between momentum states is modified by a phase shift applied to the lattice. By appropriately choosing the magnitude and timing of the phase shift, we demonstrate nearly perfect loading of the lattice ground state, the signature of which is an abrupt halt to the Rabi cycling.

arXiv:cond-mat/0305200•Physical Review A•Nov 5, 2003•25 citations

A Bose-Einstein condensate in an optical lattice

Johannes Hecker Denschlag, J. E. Simsarian, Hartmut Häffner +6 more

We have performed a number of experiments with a Bose-Einstein condensate (BEC) in a one-dimensional optical lattice. Making use of the small momentum spread of a BEC and standard atom optics techniques, a high level of coherent control over an artificial solid-state system is demonstrated. We are able to load the BEC into the lattice ground state with a very high efficiency by adiabatically turning on the optical lattice. We coherently transfer population between lattice states and observe their evolution. Methods are developed and used to perform band spectroscopy. We use these techniques to build a BEC accelerator and a novel, coherent, large-momentum-transfer beam-splitter.

arXiv:cond-mat/0206063•Journal of Physics B Atomic Molecular and Optical Physics•Jul 3, 2002•369 citations

Shortcut loading a Bose–Einstein condensate into an optical lattice

Xiaoji Zhou, Shengjie Jin, Jörg Schmiedmayer

We present an effective and fast (few microseconds) procedure for transferring a Bose–Einstein condensate from the ground state in a harmonic trap into the desired bands of an optical lattice. Our shortcut method is a designed pulse sequence where the time duration and the interval in each step are fully optimized in order to maximize robustness and fidelity of the final state with respect to the target state. The atoms can be prepared in a single band with even or odd parity, and superposition states of different bands can be prepared and manipulated. Furthermore, we extend this idea to the case of two-dimensional or three-dimensional optical lattices where the energies of excited states are degenerate. We experimentally demonstrate various examples and show very good agreement with the theoretical model. Efficient shortcut methods will find applications in the preparation of quantum systems, in quantum information processing, in precise measurement and as a starting point to investigate dynamics in excited bands.

arXiv:1802.08779•New Journal of Physics•Apr 30, 2018•54 citations

Fast momentum-selective transport of Bose–Einstein condensates via controlled nonadiabatic dynamics in optical lattices

R. Chamakhi, Dana Codruta Marinica, Naceur Gaaloul +2 more

We present a detailed numerical study of a protocol for momentum-selective transport of a Bose–Einstein condensate in a one-dimensional optical lattice, achieving narrow momentum distributions through controlled nonadiabatic dynamics. The protocol consists of nonadiabatic loading into the lattice, coherent acceleration using a symmetric trapezoidal acceleration profile, and nonadiabatic release into free space. Using the time-dependent Gross–Pitaevskii equation, we simulate the full sequence and analyze the role of nonadiabatic excitations on the final momentum distribution. We identify the intrasite breathing dynamics as the dominant mechanism governing spectral purity under fast loading conditions. By tracking the condensate's spatial width during the evolution, we demonstrate a direct correlation with the final momentum spread. A variational model based on a Gaussian ansatz quantitatively reproduces the observed dynamics and provides physical insight into the breathing mechanism. Our results reveal the existence of “magic” times, i.e., specific loading or acceleration durations synchronized with the breathing oscillation period, where quasimonochromatic momentum distributions can be achieved even with loading times as short as 100 μs. In the tight-binding regime, this approach offers speedup factors of 3 to 6 compared to adiabatic protocols while maintaining high transfer fidelities, providing a practical route to coherent transport for quantum sensors operating under stringent timing constraints.

arXiv:2509.16367•AVS Quantum Science•Mar 1, 2026•0 citations

Pulse loading87Rb Bose-Einstein condensation in optical lattice: the Kapitza-Dirac scattering and temporal matter-wave-dispersion Talbot ef fect

陈海霞 Haixia Chen, 熊德智 Dezhi Xiong, 王鹏军 Pengjun Wang +1 more

We study 87Rb Bose-Einstein condensation (BEC) loading into the pulse of the one-dimensional (1D) optical lattice experimentally. The lattice is turned on abruptly, held constant for a variable time, and then turned off abruptly. The measurement of the depth of the optical lattice is obtained by Kapitza-Dirac scattering. The temporal matter-wave-dispersion Talbot effect with 87Rb BEC is observed by applying a pair of pulsed standing waves (as pulsed phase gratings) with the separation of a variable delay.

Chinese Optics Letters•Jan 1, 2010•1 citation
We present a scheme for nonadiabatically loading a Bose-Einstein condensate into the ground state of a one-dimensional optical lattice within a few tens of microseconds, i.e., typically in less than half the Talbot period. This technique of coherent control is based on sequences of pulsed perturbations, and the experimental results demonstrate its feasibility and effectiveness. As the loading process is much shorter than the traditional adiabatic loading time scale, this method may find many applications.
A protocol is proposed for the rapid coherent loading of a Bose-Einstein condensate into the ground state of an optical lattice, without residual excitation associated with the breakdown of adiabaticity. The driving potential required to assist the rapid loading is derived using the fast-forward technique, and generates the ground state in any desired short time. We propose an experimentally feasible loading scheme using a bichromatic lattice potential, which approximates the fast-forward driving potential with high fidelity.
We present a scheme for rapidly loading a Bose-Einstein condensate into a single Bloch state of a weak optical lattice at a quasimomentum of $q=\ensuremath{\Elzxh}k.$ Rabi cycling of the Bose-Einstein condensate between momentum states is modified by a phase shift applied to the lattice. By appropriately choosing the magnitude and timing of the phase shift, we demonstrate nearly perfect loading of the lattice ground state, the signature of which is an abrupt halt to the Rabi cycling.
We have performed a number of experiments with a Bose-Einstein condensate (BEC) in a one-dimensional optical lattice. Making use of the small momentum spread of a BEC and standard atom optics techniques, a high level of coherent control over an artificial solid-state system is demonstrated. We are able to load the BEC into the lattice ground state with a very high efficiency by adiabatically turning on the optical lattice. We coherently transfer population between lattice states and observe their evolution. Methods are developed and used to perform band spectroscopy. We use these techniques to build a BEC accelerator and a novel, coherent, large-momentum-transfer beam-splitter.
We present an effective and fast (few microseconds) procedure for transferring a Bose–Einstein condensate from the ground state in a harmonic trap into the desired bands of an optical lattice. Our shortcut method is a designed pulse sequence where the time duration and the interval in each step are fully optimized in order to maximize robustness and fidelity of the final state with respect to the target state. The atoms can be prepared in a single band with even or odd parity, and superposition states of different bands can be prepared and manipulated. Furthermore, we extend this idea to the case of two-dimensional or three-dimensional optical lattices where the energies of excited states are degenerate. We experimentally demonstrate various examples and show very good agreement with the theoretical model. Efficient shortcut methods will find applications in the preparation of quantum systems, in quantum information processing, in precise measurement and as a starting point to investigate dynamics in excited bands.
We present a detailed numerical study of a protocol for momentum-selective transport of a Bose–Einstein condensate in a one-dimensional optical lattice, achieving narrow momentum distributions through controlled nonadiabatic dynamics. The protocol consists of nonadiabatic loading into the lattice, coherent acceleration using a symmetric trapezoidal acceleration profile, and nonadiabatic release into free space. Using the time-dependent Gross–Pitaevskii equation, we simulate the full sequence and analyze the role of nonadiabatic excitations on the final momentum distribution. We identify the intrasite breathing dynamics as the dominant mechanism governing spectral purity under fast loading conditions. By tracking the condensate's spatial width during the evolution, we demonstrate a direct correlation with the final momentum spread. A variational model based on a Gaussian ansatz quantitatively reproduces the observed dynamics and provides physical insight into the breathing mechanism. Our results reveal the existence of “magic” times, i.e., specific loading or acceleration durations synchronized with the breathing oscillation period, where quasimonochromatic momentum distributions can be achieved even with loading times as short as 100 μs. In the tight-binding regime, this approach offers speedup factors of 3 to 6 compared to adiabatic protocols while maintaining high transfer fidelities, providing a practical route to coherent transport for quantum sensors operating under stringent timing constraints.
We study 87Rb Bose-Einstein condensation (BEC) loading into the pulse of the one-dimensional (1D) optical lattice experimentally. The lattice is turned on abruptly, held constant for a variable time, and then turned off abruptly. The measurement of the depth of the optical lattice is obtained by Kapitza-Dirac scattering. The temporal matter-wave-dispersion Talbot effect with 87Rb BEC is observed by applying a pair of pulsed standing waves (as pulsed phase gratings) with the separation of a variable delay.