scholarly journals The Bose-Einstein Condensate and Cold Atom Laboratory

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Kai Frye ◽  
Sven Abend ◽  
Wolfgang Bartosch ◽  
Ahmad Bawamia ◽  
Dennis Becker ◽  
...  
Keyword(s):  
Space Station ◽  
Cold Atom ◽  
Einstein Condensate ◽  
Atom Interferometry ◽  
Microgravity Environment ◽  
Atom Optics ◽  
Trapped Atoms ◽  
Bose Einstein Condensate ◽  
Bose Einstein ◽  
Coherent Manipulation

AbstractMicrogravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension and eliminates the gravitational sag for trapped atoms. These advantages motivated numerous initiatives to adapt and operate experimental setups on microgravity platforms. We describe the design of the payload, motivations for design choices, and capabilities of the Bose-Einstein Condensate and Cold Atom Laboratory (BECCAL), a NASA-DLR collaboration. BECCAL builds on the heritage of previous devices operated in microgravity, features rubidium and potassium, multiple options for magnetic and optical trapping, different methods for coherent manipulation, and will offer new perspectives for experiments on quantum optics, atom optics, and atom interferometry in the unique microgravity environment on board the International Space Station.

scholarly journals Shell potentials for microgravity Bose–Einstein condensates

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
N. Lundblad ◽  
R. A. Carollo ◽  
C. Lannert ◽  
M. J. Gold ◽  
X. Jiang ◽  
...  
Keyword(s):  
Space Station ◽  
Cold Atom ◽  
Einstein Condensate ◽  
Quantum Gas ◽  
Ellipsoidal Shell ◽  
Magnetically Trapped ◽  
Bose Einstein Condensate ◽  
Bose Einstein ◽  
Shell Geometry ◽  
Insight Into

AbstractExtending the understanding of Bose–Einstein condensate (BEC) physics to new geometries and topologies has a long and varied history in ultracold atomic physics. One such new geometry is that of a bubble, where a condensate would be confined to the surface of an ellipsoidal shell. Study of this geometry would give insight into new collective modes, self-interference effects, topology-dependent vortex behavior, dimensionality crossovers from thick to thin shells, and the properties of condensates pushed into the ultradilute limit. Here we propose to implement a realistic experimental framework for generating shell-geometry BEC using radiofrequency dressing of magnetically trapped samples. Such a tantalizing state of matter is inaccessible terrestrially due to the distorting effect of gravity on experimentally feasible shell potentials. The debut of an orbital BEC machine (NASA Cold Atom Laboratory, aboard the International Space Station) has enabled the operation of quantum-gas experiments in a regime of perpetual freefall, and thus has permitted the planning of microgravity shell-geometry BEC experiments. We discuss specific experimental configurations, applicable inhomogeneities and other experimental challenges, and outline potential experiments.

scholarly journals ATOM INTERFEROMETRY WITH A WEAKLY INTERACTING BOSE-EINSTEIN CONDENSATE

2009 ◽  
Author(s):  
M. FATTORI ◽  
B. DEISSLER ◽  
C. D'ERRICO ◽  
M. JONA-LASINIO ◽  
M. MODUGNO ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Atom Interferometry ◽  
Bose Einstein Condensate ◽  
Weakly Interacting ◽  
Bose Einstein

scholarly journals A COLD-ATOM RATCHET INTERPOLATING BETWEEN CLASSICAL AND QUANTUM DYNAMICS

2013 ◽  
Vol 12 (02) ◽  
pp. 1340003 ◽  
Author(s):  
R. K. SHRESTHA ◽  
W. K. LAM ◽  
J. NI ◽  
G. S. SUMMY
Keyword(s):  
Classical Limit ◽  
Quantum Dynamics ◽  
Cold Atom ◽  
Einstein Condensate ◽  
Single Variable ◽  
Pulse Period ◽  
Short Pulses ◽  
Bose Einstein Condensate ◽  
Experimental Parameters ◽  
Bose Einstein

We use an atomic ratchet realized by applying short pulses of an optical standing-wave to a Bose–Einstein condensate to study the crossover between classical and quantum dynamics. The signature of the ratchet is the existence of a directed current of atoms, even though there is an absence of a net bias force. Provided that the pulse period is close to one of the resonances of the system, the ratchet behavior can be understood using a classical like theory which depends on a single variable containing many of the experimental parameters. Here we show that this theory is valid in both the true classical limit, when the pulse period is close to zero, as well as regimes when this period is close to other resonances where the usual scaled Planck's constant is nonzero. By smoothly changing the pulse period between these resonances we demonstrate how it is possible to tune the ratchet between quantum and classical types of behavior.

scholarly journals Cold-atom gravimetry with a Bose-Einstein condensate

2011 ◽  
Vol 84 (3) ◽  
Author(s):  
J. E. Debs ◽  
P. A. Altin ◽  
T. H. Barter ◽  
D. Döring ◽  
G. R. Dennis ◽  
...  
Keyword(s):  
Cold Atom ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein
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