scholarly journals Observer dependence for the phonon content of the sound field living on the effective curved space-time background of a Bose-Einstein condensate

2004 ◽  
Vol 69 (6) ◽  
Author(s):  
Petr O. Fedichev ◽  
Uwe R. Fischer
Keyword(s):  
Sound Field ◽  
Space Time ◽  
Einstein Condensate ◽  
Curved Space ◽  
Bose Einstein Condensate ◽  
Bose Einstein

A TRAPPED DIPOLAR BEC INTERFEROMETRY TEST OF E = mc2

2006 ◽  
Vol 15 (12) ◽  
pp. 2235-2240 ◽  
Author(s):  
FABRIZIO PINTO
Keyword(s):  
Quantum Mechanics ◽  
Potential Energy ◽  
Optical Lattice ◽  
Einstein Condensate ◽  
The Novel ◽  
Mass Energy ◽  
Curved Space ◽  
Bose Einstein Condensate ◽  
Effective Change ◽  
Bose Einstein

It is shown that, by arranging the atoms in a Bose–Einstein condensate gas within an optical lattice, it is possible to directly verify experimentally that the van der Waals potential energy contributes an effective change to the gravitational mass of the atoms trapped in the array sites equal to that predicted by Einstein's mass–energy equivalency equation, E = mgc2. Some original results of electrostatics and quantum mechanics in curved space are discussed, and strategies to amplify and observe these effects are quantitatively evaluated to illustrate the feasibility of the novel test proposed herein.

scholarly journals Dynamics of a space-time crystal in an atomic Bose-Einstein condensate

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
L. Liao ◽  
J. Smits ◽  
P. van der Straten ◽  
H. T. C. Stoof
Keyword(s):  
Space Time ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Josephson junction formed in the wormhole space-time from the analysis of the critical temperature of BEC

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Shingo Takeuchi
Keyword(s):  
Critical Temperature ◽  
Josephson Junction ◽  
Space Time ◽  
Einstein Condensate ◽  
Exotic Matter ◽  
Traversable Wormhole ◽  
Bose Einstein Condensate ◽  
Bose Einstein

AbstractIn this study, we consider a gas in the Morris–Thorne traversable wormhole space-time, and analyze the critical temperature of the Bose-Einstein condensate in the vicinity of its throat. Our results show that it is equal to zero. Then, from this result, we point out that a state analogous to the Josephson junction is always formed at any temperature in the vicinity of its throat. This is of interest as a gravitational phenomenology. Of course, there is the problem of the exotic matter, but we perform this work without treating it.

scholarly journals Transport of a Single Cold Ion Immersed in a Bose-Einstein Condensate

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
T. Dieterle ◽  
M. Berngruber ◽  
C. Hölzl ◽  
R. Löw ◽  
K. Jachymski ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Ultrafast electron cooling in an expanding ultracold plasma

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tobias Kroker ◽  
Mario Großmann ◽  
Klaus Sengstock ◽  
Markus Drescher ◽  
Philipp Wessels-Staarmann ◽  
...  
Keyword(s):  
Theoretical Models ◽  
Einstein Condensate ◽  
Direct Access ◽  
Electron Cooling ◽  
Plasma Dynamics ◽  
Strongly Coupled ◽  
Bose Einstein Condensate ◽  
Ultracold Plasma ◽  
Strongly Coupled Plasma ◽  
Bose Einstein

AbstractPlasma dynamics critically depends on density and temperature, thus well-controlled experimental realizations are essential benchmarks for theoretical models. The formation of an ultracold plasma can be triggered by ionizing a tunable number of atoms in a micrometer-sized volume of a 87Rb Bose-Einstein condensate (BEC) by a single femtosecond laser pulse. The large density combined with the low temperature of the BEC give rise to an initially strongly coupled plasma in a so far unexplored regime bridging ultracold neutral plasma and ionized nanoclusters. Here, we report on ultrafast cooling of electrons, trapped on orbital trajectories in the long-range Coulomb potential of the dense ionic core, with a cooling rate of 400 K ps−1. Furthermore, our experimental setup grants direct access to the electron temperature that relaxes from 5250 K to below 10 K in less than 500 ns.

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